RESPONS OF THREE VARIETIES AT UPLAND RICE (Oryza sativa L.) TO THE RATIO OF VERMICOMPOST AND CHEMICAL FERTILIZERS

Abstract

Abstrak Rice is the staple food for most of the world’s population. Increasing rice production still very depends on the use of chemical fertilizers very much. The use of organic fertilizer is needed to replace the role of chemical fertilizer, preserving the environment and for sustainable agriculture. The research used a randomized block design with two factors. The first factor is about varieties (V), which include Situ Patenggng(V1), Situ Bagendit (V2), and Limboto (V3). The sesond factors is the ratio of vermicompost and chemical fertilizers, which include: vermicompost 100% (K1), vermicompost 75% + chemical fertilizer 25% (K2), vermicompost 50% + chemical fertilizer 50% (K3), vermicompost 25% + chemical fertilizer 75% (K4) and chenical fertilizer 100% (K5). The result obtained that varieties significantly affected the parameters of plant height 8 weeks after planting, the number of tillers are 8 weeks after planting, the number of productive tillers, length of panicle, the number of grains per hill, number of grains contain per cluster, the percentage of grains contain per clump, and 1000 grain weight. The ratio of vermicompost and chemical fertilizers significantly affected the parameters of plant height 8 week after planting, the number of riller week after planting, number of productive tillers, number of grains per hill, percentage of grains contain per clump, and 1000 grain weight. The interaction between varieties and ratio of vermicompost and chemical fertilizers only affect the parameters of grain content per hill and percentage of grain contains per clump. The best variety is Situ Patenggang and the ratio of vermicompost and chemical fertilizer are vermicompost 75% +25% chemical fertilizers.