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Browsing by Author "Fatonah, Siti"

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AKTIVITAS ANTIOKSIDAN EKSTRAK PUCUK DAUN DAN DAUN MUDA PEREPAT (Sonneratia alba) DI DESA SAPAT
(Elfitra, 2022-06) Haryanti, Windy Teguh; Fatonah, Siti
Perepat plant (Sonneratia alba) is one of the mangrove species that has the potential as a source of antioxidants that is used by the people of Sapat Village, Indragiri Hilir Regency, Riau Province. The purpose of this study was to determine the antioxidant activity of the perepat leaf extract at different leaf maturity. Testing of antioxidant activity was carried out using the DPPH radical scavenging method. The results showed that the antioxidant activity of extracts of perepat leaf shoots and young leaves perepat with IC50 were 56,89 ppm and 33,83 ppm respectively.
APLIKASI MULSA ORGANIK Pueraria javanica DAN KOMPOS PELEPAH KELAPA SAWIT(Elaeis guineensis) TERHADAP PERKECAMBAHAN DAN PERTUMBUHAN ANAKAN GULMA Borreria alata (Aublet) DC
(2013-03-21) Indraheni, Rina; Fatonah, Siti; Herman
One of the alternative methods for weed control is soil mulching. Mulches influence weed germination and growth by blocking the daylight. Soil surface can be mulched by different materials. Such as organic materials. The objectives of this experiment were to evaluate the effect two organic mulches Pueraria javanica and the palm oil stem compost (Elaeis guenensis) on Borreria alata. In this study with thicknesses (2.5, 7.5 and 12.5 cm) and an unmulched. The observed data was analyzed using Analysis of Variance (ANOVA) and the significant differences among the treatment means were determined using Duncan’s Multiple Range test with probability level of P=0.05. The results showed that all organic mulches lessen weed germination and growth. Mulch of Pueraria javanica with thickness 2.5 cm reduced weed germination as 76.29% and growth as 44.26%. Palm oil stem compost (Elaeis guenensis) with thickness 2.5 cm had the strongest influence on the decrease of weed germination i.e 86.60% and growth i.e 32.79%. The 7.5 cm and 12.5 cm thickness mulching with Pueraria javanica and Palm oil stem compost (Elaeis guenensis) didnot germinate weeds
EFEKTIVITAS SKARIFIKASI DAN KONSENTRASI AIR KELAPA MUDA TERHADAP PERKECAMBAHAN BIJI NYAMPLUNG (Calophyllum inophyllum L.)
(2013-06-17) Oknasari, Leni; Fatonah, Siti; Iriani, Dyah
The Seed of nyamplung (Calophyllum inophyllum L.) has long germination time due to the physical and mechanical dormancy in fruit skin, therefore a pretreatment is necessary before seed planting. This study aimed to determine the effect of scarification and concentration of young coconut water on seed germination of nyamplung. The study had been carried out in the green house, Department of Biology, Faculty of Mathematics and Natural Sciences, University of Riau, from August to November 2012. The design used was factorial Randomized Block Design (RBD) with two factors. The first factor was scarification with two treatments i.e. without scarification (S0) and with cracking scarification (S1). The second factor was without immersion (K0) and the concentration of young coconut water with five treatments i.e. immersion in water 0% (K1), 25% (K2), 50% (K3), 75% (K4), 100% (K5). Data were analyzed using Analysis of variace (ANOVA), if there was a significant effect then followed by Duncan's Multiple Range Test (DMRT) at the level of 5%. Scarification treatment increases the germination, while the coconut water treatment does not increase the germination and also there is no interaction between treatments scarification and coconut water concentration on the germination. The results showed that scarification treatments gave better results as follow: 44th emergence day of sprout; 100% percentage of germination; 0.10 germination rate.
INDUKSI KALUS DARI EKSPLAN DAUN IN VITRO KELADI TIKUS (Typhonium sp.) DENGAN PERLAKUAN 2,4-D DAN KINETIN
(2016-01-26) Sitinjak, Marlina Agustina; Isda, Mayta Novaliza; Fatonah, Siti
Rodent tuber (Typhonium sp.) belongs to Araceae that has a potential as medicinal plant. The propagation of rodent tuber was conducted using vegetative propagation from bulbs. This procedure takes a long periode to produce a large quantity of plant. Therefore, an in vitro propagation using callus culture is necessary to solve this problem. This research aimed to determine the best concentration of 2,4-D and kinetin to induce callus of in vitro leaf rodent tuber explants. The research was conducted at the Laboratory Terpadu of Biology, Faculty of Math and Natural Sciences UR from August 2014 to January 2015. This research used in vitro leaft explants of rodent tuber with MS medium. The design used is Randomize Group Design with 10 treatment i.e. (A) Without treatment (Control), (B) 0.5 mg / L 2.4-D, (C) 1 mg / L 2.4-D, (D) 1.5 mg / L 2.4-D, (E) 0.5 mg / L 2.4-D + 0.3 mg / L kinetin, (F) 1 mg / L 2.4-D + 0.3 mg / L kinetin, (G) of 1.5 mg / L 2,4-D + 0.3 mg / L kinetin, (H) 0.5 mg / L 2.4-D + 0.5 mg / L kinetin, (I) 1 mg / L 2.4-D + 0.5 mg / L kinetin, (J) 1.5 mg / l 2,4-D + 0.5 mg / L kinetin. The results showed that explants could not produce callus, the explants response just a swelling leaf explants and browning in leaf margin because of an injuries. The treatment that could give up to 100% swelling response was 2.4-D mg / L single (0.5 mg / L and 1 mg / L) and the combination treatment (0.5 mg / L 2.4-D + 0.3 mg /L kinetin, 0.5 mg / L 2.4-D + 0.5 mg / L kinetin and 1.5 mg / L 2.4-D + 0.5 mg / L kinetin). The treatments that could maintain 66.67% explants growth was the combination 0.5 mg / L 2.4-D + 0.5 mg / L kinetin and 1 mg /L 2.4-D + 0.5 mg / L kinetin
Induksi Tunas Dan Pembentukan Akar Dari Eksplan Kotiledon Jeruk Siam (Citrus Nobilis Lour.) Asal Kampar Secara In Vitro
(2017-02-10) Isda, Mayta Novaliza; Fatonah, Siti; Lestari, Wahyu
Tissue culture was an alternative way in micropropagation of siam orange (Citrus nobilis Lour.) from Kampar one of the main commodity in Riau province. Shoot induction as an early stage propagation and the rooting stage were very important parts to produce plantlet in vitro technique. The aim of this study was to determine the best BAP and NAA concentration for shoot induction and rooting of siam orange from Kampar. This study using a randomized block design with faktorial treatment. The results of this study show that the best shoot induction was obtained from cotyledon explant grown on MS medium without BAP. The percentage and the average number of shoot were 91,67% and 1,50 respectively. The combination of MS medium with 1 mg/L NAA was the most optimum concentration in rooting induction of siam orange from Kampar, with the percentage of root growth and the highest average number of root 90% and 6.3 roots respectively.
INDUKSI TUNAS DARI EKSPLAN BIJI MANGGIS (Garcinia mangostana L.) DIBELAH EMPAT PADA MEDIA MS (MURASHIGE-SKOOG) DENGAN PENAMBAHAN BAP DAN MADU SECARA IN VITRO
(2016-01-28) Amin, Nur Aisyah; Isda, Mayta Novaliza; Fatonah, Siti
Mangosteen (Garcinia mangostana L.) is a tropical plant that has export value because it has a rich of antioxidant, xanthone, alpha and beta, that can be used for medicine as an anti-cancer agent. One of the alternative method to produce large number and uniform mangosteen seedlings inshort period can be done using in vitro culture technique. The purpose of this research was to determine the optimal concentration of BAP and honey in inducing shoot from of mangosteen explants from seed that had been divided into four parts and also to determine the best combination to induce mangosteen shoot uisngin vitromethod. The research was conducted at Integrated Biology Laboratory Department of Biologi, Faculty of Mathematics and Natural Sciences, Riau University from January until April 2015. This research used a Completely Randomized Design (CRD) with the concentration of BAP (3; 7 mg/l) and honey (3; 6; 9 ml/l), or in combination on MS medium with 5 replications.The result showed that the treatment on medium supplemented with each BAP and honeyor in combination gave the highest percentage of explant growthand shoot formation (100%)while the medium supplement with 7 mg/l BAP + 6 ml/l honey only need six days for shoot induction
INDUKSI TUNAS DARI EKSPLAN BIJI TANAMAN NYAMPLUNG (Calophyllum inophyllum L.) DENGAN PENAMBAHAN Benzylaminopurine (BAP) SECARA In Vitro
(2014-03-28) Imaniah, Muthia Rahmatul; Fatonah, Siti; Isda, Mayta Novaliza
Nyamplung (Calophyllum inophyllum) is economicaly and ecologicaly multifunctional useful plants, which has the potential to produce biofuels. This study aims to determine the optimum concentration of BAP in promoting the formation of shoot from nyamplung seed explants. This study uses the BAP treatment arranged in a randomized (RAK) which are 0, 0.5, 1, 2, 4 and 8 mg/l. Data was analyzed using ANOVA (Analysis of Variance) and if significant followed by DMRT (Duncan's Multiple Range Test) with a level of 5%. The results showed that the best shoot induction is seed explant planted on MS medium in addition of 8 mg/l BAP, with the percentage of shoots at 100% and resulted in the highest number of shoot 4.8
INDUKSI TUNAS EKSPLAN BIJI TEMBESU (Fagraea fragrans Roxb.) PADA MEDIA WPM DENGAN PENAMBAHAN BAP SECARA IN VITRO
(2016-01-28) Haryono, Noto; Isda, Mayta Novaliza; Fatonah, Siti
One of the forest crop that has high prospect to be developed as quality for strong wood is tembesu (Fagraea fragrans Roxb.). Its wood can be used for a heavy construction and home construction. The seedlings produced from seeds of tembesu in natural stands are rarely found seedlings causing problems in propagation. The aim of this research was to determine the effect of BAP and the best concentration in inducing shoots from seed tembesu explants using in vitro method. This research was conducted at the Laboratory of Integrated Biology Department of Biology Faculty of Mathematics and Natural Sciences University of Riau from December to April 2015. This research used a Completely Randomized Design (CRD) with the concentration of BAP (0; 0,5; 1; 1,5; 2; 2,5; 3; 3,5; 4 mg/l) with 5 replications. Seeds the were planted in the media WPM for 120 days. The results of this research showed the highest percentage of shoot formation is 100% contained in the control treatment. The highest number of shoots produced in treatment of 1 mg/l BAP was 5,93 shoots. The highest average of shoot length was in control treatment 3,14 cm
INDUKSI TUNAS IN VITRO DARI EKSPLAN TUNAS BUAH ( SLIP) TANAMAN NANAS (Ananas comosus (L.) Merr.) ASAL KAMPAR DENGAN PENAMBAHAN 6-BENZYLAMINOPURINE (BAP)
(2014-03-28) Susiyani; Lestari, Wahyu; Fatonah, Siti
Pineapple ( Ananas comosus (L.) Merr.) is widely cultivated. One of pineapple plantation centers in Riau Province is the Kampar district. The vegetative seedling technique of pineapple is done using tissue culture techniques. Pineapple plant part that used as explants in this s tudy is fruit buds. Explants were cut into whole bud and bud sectioned longitudinally . The growth regulator used was BAP with different concentration, i.e.0.0, 0.5, 1.0, 1.5, 2.0, 2.5 mg/l in Murashige and Skoog (MS )medium. This study aims to determine the optimum concentration of BAP as well as the best explant part and to get the best combination between treatments in shoot induction. The study design used randomized block design ( RBD) factorial. The concentration of 1.0 mg/l BAP on whole bud explants induced 3 buds, while t he bud sectioned longitu dinally induced on ly one shoot on control, and concentration at 0.5 and 1.0 mg/l. Whole bud explants induced shoots in all of the treatments except the control. The interaction between treatment and the combination that could induced the greatest number of shoo t was the whole bud explants with the addition of 1.0 mg/l BAP.
INDUKSI TUNAS IN VITRO DARI TUNAS BATANG (Sucker ) TANAMAN NANAS (Ananas comosus (L .) Merr.) ASAL KAMPAR DENGAN PENAMBAHAN 6-BENZYLAMINOPURINE (BAP)
(2014-03-28) Sari, Risna Manda; Lestari, Wahyu; Fatonah, Siti
Pineapple (Ananas comosus (L.) Merr.) is a fruit plant that is like d most people . Fruit production and seedling availability have to be balance d in order to provide consumer’s need . This problem can be solved using an in vitro technique . This research used Group Randomized Design ( GRD) Factorial with two factors which are concentration of BAP and explant section. The concentrations of BAP used in this study were 0,0; 0,5; 1,0; 1,5; 2,0; 2,5 mg/l on MS medium. Explant source was collected from sucker , with two different parts whole bud and bud sectioned longitudinally. The obje ctive s of this research were to get the optimal concentration, the best explant's cut part, and to get the best treatment interaction and combination for in vitro shoot induction. The r esult showed that the whole bud that could give response to BAP was indicated by shoot formation. The shoot was formed in the percentage of 25% with concentration 1,0 mg/l on 12 th day.
INDUKSI TUNAS JERUK SIAM (Citrus nobilis Lour.) ASAL KAMPAR DENGAN PEMBERIAN BENZIL AMINO PURIN (BAP) SECARA IN VITRO
(2013-05-13) Purba, Lamtiur; Fatonah, Siti; Lestari, Wahyu
Shoot induction is an early stage in plant propagation in vitro. The aim this of study was to determine the best BAP concentration and type of explants for shoot induction of siam orange (Citrus nobilis Lour.) from Kampar using in vitro technique. The study had been conducted in the Laboratory of Integrated Biology, Department of Biology, Faculty of Mathematics and Natural Science, University of Riau from May to June 2012, using randomized block design with factorial treatment. This experiment used two factors, the first factor was BAP concentration consisted of five levels: 0, 1, 2, 3, 4, 5 mg/l and the second factor was the type of explant (whole seed and cotyledon). The explants were cultured in MS medium with 12 replications. The data was analyzed using Analysis Of Variance (ANOVA) and if the result was significant, this analysis was continued using Duncan Multiple Range Test (DMRT) at the level of 5%. The results of this study showed that the best shoot induction was obtained from whole seed and cotyledon explant grown that on MS medium without BAP. The percentage and the average number of shoot from whole seed explants were 100% and 4,08, respectively. While the percentage and the average number of shoot from cotyledon explants were 91,67% and 1,50, respectively. Therefore the shoot induction from whole seed explant better than cotyledon explant.
Karakteristik Durian (Durio zibethinus Murr.) Tahan Simpan Asal Pulau Bengkalis
(2013-03-04) Sukoco; Fatonah, Siti; Fitmawati
Bengkalis island is one of island in Riau that has the highest durian (Durio zibethinus Murr.) diversity. Storage life time is an importance characteristic in agribusiness. The aim of this research is to characterize the storage life time of durian cultivars and to recomend the superior candidate parents in Bengkalis Island, Riau Province based on morphologies and post harvest characters. Data was analyzed using analysis of varians (ANOVA) and correlated between characters using pearson corelation analysis. Storage life time of durian is between 0.33 to 5 day. Result from Pearson correlation showed that there are 7 characters in positive and 4 characters in negative correlation. The longest storage life time was found at BT11 cultivar 5 days and 0.33 day respectively SB4 and had negative correlation with aril texture about 0.581%
KEANEKARAGAMAN PLASMA NUTFAH JERUK SIAM (Citrus nobilis Lour.) DI KABUPATEN KAMPAR PROPINSI RIAU BERDASARKAN KARAKTER MORFOLOGI
(2012-11-12) NihayatuI Wahibah, Ninik; Fatonah, Siti; Irayuni
The objective of this study was to analyze the germplasm variation and relationship among 30 individuals of citrus {Citrus nobilis Lour.) from Kabupaten Kampar (kecamatan Tambang and Bangkinang Barat) based on morphological traits. A total of 39 both of vegetative and generative traits were observed and scored, Manhattan dissimilarity among 30 citrus trees ranged from 19% to 86%. The dendogram indicated that the classification of citrus by morfologicai data was not reflected their geographic origin. Meanwhile, based on fruit traits (taste, size, weight, bitter taste and water content), there were four individuals considered as potential trees for citrus breedin program.
KOMPOSISI FLORISTIK GULMA DI PERKEBUNAN KELAPA SAWIT YANG BERBEDA UMUR TEGAKAN DAN METODE PENGENDALIANNYA DI DESA TAMBANG, KAMPAR
(2014-03-05) Fatonah, Siti; Herman
Penelitian ini bertujuan untuk menginventarisasi jenis-jenis gulma yang terdapat di dua lahan perkebunan kelapa sawit yang berbeda umur dan metode pengendalian gulmanya serta mengetahui jenis-jenis gulma yang mendominasi di kedua lahan tersebut. Penelitian ini dilaksanakan di perkebunan kelapa sawit Desa Tambang Kecamatan Tambang Kabupaten Kampar pada bulan Juni sampai Juli 2010. Dari hasil penelitian menunjukkan adanya perbedaan komposisi floristic gulma pada dua lahan tersebut. Pada lahan dengan umur tegakan 1,5 tahun keanekaragaman gulma lebih rendah namun kerapatan gulma lebih tinggi dibandingkan pada lahan di bawah tegakan kelapa sawit umur 13 tahun. Gulma yang mendominasi di lahan umur tanaman kelapa sawit 1,5 tahun antara lain Imperata Cylindrica, Digitaria sanguinalis, Cyperus rotundus, Borreria alata, Paspalum conjugatum, eupatorium odoratum, Glechenia lenaralis, Mikania michranhta, dan Ageratum conyzoides. Pada lahan di bawah tanaman kelapa sawit umur 13 tahun gulma yang dominan antara lain Stenochlaena palustri, Souropus sp, Nephrolepis bustoniensis, Melastoma affine, Dicranopteris linearis dan Cyperus rotundus
LAJU DEKOMPOSISI SERASAH DALAM DUA SISTEM BUDIDAYA KARET PADA LAHAN GAMBUT DI KAWASAN RIMBO PANJANG, RIAU
(2013-03-04) Anggrini, Maimona; Muhammad, Ahmad; Fatonah, Siti
This study focused on two smallholder rubber systems in Riau, i.e. “rubber jungle” and “rubber garden,” which have contrasting vegetative structure. Owing to the absence of weeding, rubber jungle may become as dense as 1100-1200 trees/ha, consisting of around 28.80% non-rubber trees. In rubber garden, stand density is retained at usually 500-600 trees/ha and as monospecific stands. Such differences have been suspected to affect decomposition process beneath each system. The purpose of this study was to determine and compare the rate of litter decomposition and nutrient changes in rubber forest and rubber garden. This research has been done throughout the period of February-August 2012 (180 days) on a peatland area situated at Rimbo Panjang, Kampar Regency, Riau. Dried naturally-fallen rubber leaves were used as litter, which was exposed to field conditions in nylon litter bags. In both rubber growing systems, litter rapidly lost substantial amount of its mass (averagely 34.59%) during the first 30 days, but the decomposition slowed down thereafter until the end of the experiment on the 180th day, where the average remaining litter mass was 43.13% of the initial mass. Litter decomposition rate in earlier phase was 1.16%/day and slowed down to 0.32%/day to the 180th day. C/N ratio declined through time, starting from 40.41 to 27.42. P content did not change much through time, while K fluctuated slightly. In contrast, Ca increased in earlier phase to the middle of decomposition process and decreased afterwards. Mg decreased though time
LAJU PRODUKSI SERASAH DALAM DUA SISTEM BUDIDAYA KARET PADA LAHAN GAMBUT DI KAWASAN RIMBO PANJANG, RIAU
(2013-03-04) Nanda, Fristya; Muhammad, Ahmad; Fatonah, Siti
The contrasting difference in the vegetation structure of two smallholder rubber growing systems, namely “rubber jungle” and “rubber garden,” has been suspected to affect nutrient cycling in both systems. In this study, we focused on litter production, which roughly reflects the rate of nutrient return to the soil. The objective of the present study has been to assess litter production and composition in both types of rubber growing systems. Our study sites were situated in a peatland area at Rimbo Panjang, Kampar Regency, Riau, where we selected four rubber jungle plots and four rubber garden. Three litter traps (each 1 x 1 x 1 m) were systematically set up beneath rubber stands in a regular interval of 30 m within each selected plot. Trapped litter was collected weekly for 26 consecutive weeks between February and August 2012. Litter samples were dried up to their constant dry weight before weighing and analyzed after their components (leaves, flower and fruits, others). They were also analyzed on a monthly basis for their contents of C, N, P, K Ca, and Mg. In both systems, litter production was strongly correlated with monthly rainfall volume (r2= 0.91 and 0.95in rubber jungle and rubber garden, respectively). Litter production rate was 71.56 g/m2/month or 8587,2 kg/ha/yr in rubber jungle and 65.36 g/m2/month or 7843,2 kg/ha/yr in rubber garden. There was, however, no significant difference between them. Litter averagely consisted of about 60% leaves, 7% flowers and fruits, and 33% other components. Leaf mass varied significantly between rubber jungle and rubber garden, while the mass of flowers and fruits and other components did not. Leaf mass also fluctuated following rainfall, which peaking in March and July. Flower and fruit mass increased from February to August, while the mass of other components decreased during the same period. C/N ratio in litter of both systems influenced by rainfall, in which litter produced during wetter months had slightly smaller C/N ratio, but the correlation between both variables was insignificant. Through litter production trees in both rubber growing systems returned N, P, K, Ca and Mg with the average rate of 125.05 kg/ha/yr, 9.94 kg/ha/yr, 29.71 kg/ha/yr, 77.99 kg/ha/yr and 29.88 kg/ha/yr, respectively
Mulsa Organik Imperata cylindrica (L.), Mucuna Bracteata DC. Dan Kompos Pelepah Kelapa Sawit (Elaeis guineensis Jacq.) Terhadap Penghambatan Perkecambahan Dan Pertumbuhan Gulma Mikania micrantha H.B.K.
(2017-10-10) Fatonah, Siti; Malinda, Sari; Herman; Isda, Mayta Novaliza
Penelitian ini bertujuan untuk menentukan pengaruh ketebalan dan jenis mulsa (mulsa Imperata cylindrica, Mucuna bracteata dan kompos pelepah kelapa sawit) terhadap perkecambahan dan pertumbuhan gulma Mikania micrantha dalam polibag di kebun. Percobaan menggunakan Rancangan Acak Kelompok, dengan berbagai perlakuan tiga jenis mulsa baik tunggal maupun kombinasinya dengan ketebalan 2,5 dan 5 cm, yang terdiri dari 11 perlakuan. Masing-masing perlakuan diulang sebanyak tujuh ulangan. Hasil penelitian menunjukkan bahwa pemberian mulsa I. cylindrica, M. bracteata dan kompos pelepah kelapa sawit serta kombinasinya mampu menghambat perkecambahan dan pertumbuhan gulma M. micrantha. Hampir semua perlakuan mulsa mampu menghambat perkecambahan dan pertumbuhan gulma M. micrantha dengan penghambatan sebesar 100 %, kecuali perlakuan mulsa M. bracteata dengan penghambatan perkecambahan sebesar 97 %.
MULTIPLIKASI TUNAS IN VITRO DARI EKSPLAN NODUS JERUK SIAM (Citrus nobilis LOUR.) ASAL KAMPAR DENGAN PENAMBAHAN BENZYLAMINOPURINE (BAP) DAN EKSTRAK MALT
(2016-01-30) Rohmawati, Siti; Fatonah, Siti; Isda, Mayta Novaliza
Citrus nobilis Lour. from Kampar is a famous citrus plant in Riau province, that is highly demanded by many people in Riau. However, the plantation area of citrus decrease due to disease attack. In order to recover this condition, it is necessary to provide citrus seedlings in large quantities. The conventional propagation requires a lot of plants and takes a long time, therefore the in vitro propagation is necessary. This study aimed to find the effects and to determine best concentration BAP alone or in combination with malt extract to shoot multiplication nodal explants in vitro Citrus nobilis Lour. This experiment was designed using a randomized block design (RBD). The treatment was giving BAP alone or in combination with malt extract. The results showed that the best treatment for shoot multiplication was in MS medium suplemented with 0.5 mg / l BAP that produced the highest number of shoots (5 shoots per explant) with number of leaves was (2 leaves per eksplan). Supply malt extract was not goot to increase number of shoot.
PEMANFAATAN SERPIHAN KAYU, RUMPUT ALANG-ALANG (IMPERATA CYLINDRICAL (L). BEAUV.) DAN DAUN ACACIA MANGIUM WILLD. SEBAGAI MULSA ORGANIK UNTUK PENGENDALIAN GULMA
(2014-03-05) Herman; Fatonah, Siti
Penelitian ini bertujuan untuk mengetahui pengaruh mulsa serbuk gergaji, rumput alang-alang dan serasah daun akasia terhadap kerapatan dan komposisi anakan gulma yang tumbuh, menentukan mulsa yang paling efektif mengendalikan gulma, dan menentukan komposisi gulma penyusunnya. Penelitian dilaksanakan pada bulan maret sampai mei 2012, di kebun biologi Jurusan Biologi FMIPA Universitas Riau. Perlakuan terdiri dari lagan tanpa mulsa, lahan dengan mulsa serpihan kayu, rumput alang-alang dan daun Acacia mangium. Masing-masing perlakuan diulang lima kali. Masing-masing bahan organic tersebut disebarkan di atas permukaan tanah dengan ketebalan 5 cm pada tiap plot ukuran 1 cm2. Pengamatan dilakukan setiap 4 minggu sekali, yaitu 4 minggu 8 minggu, dan 12 minggu setelah pemberian mulsa. Hasil penelitian menunjukkan mulsa organic yang paling efektif mengendalikan gulma adalah daun akasia, dengan persentase penghambatan sebaran 54,22%. Gulma yang paling terhambat kemunculannya oleh mulsa daun akasia adalah gulma berdaun lebar. Pemberian mulsa daun akasia mampu mengubah komposisi gulma, dengan proporsi paling sedikit adalah gulma berdaun lebar, dan proporsi gulma berdaun sempit meningkat.
PEMBIBITAN STEK KELOR (Moringa oleifera Lam.) DENGAN TIGA TINGKAT NAUNGAN YANG BERBEDA
(2020-10) Siahaan, Mawarita Br; Fatonah, Siti
Kelor (Moringa oleifera Lam.) is a plant that grows well under tropical and subtropical climates. Moringa has many benefits resulting in higher demand. Therefore it is necessary to do moringa nurseries to maintain existence of the germplasm. The purpose of this study was to determine the effect of shade on the growth of Moringa cuttings and to determine the best shade treatment in the nursery of Moringa stem cuttings. This study used a randomized block design (RBD) with 0% shade (control), 25% shade, and 75% shade treatment. Each treatment was repeated 3 times. The data observed were analyzed using Duncan's Multiple Range Test (DMRT) level of 5%. The results showed that shade treatment affected the growth of cuttings, and 25% shade with a light intensity of 29.934 Lux and an air temperature of 33.7oC significantly increased the number of leaves and cuttings diameter.

Browsing by Author "Fatonah, Siti"

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