Pertumbuhan Tanaman Kedelai (Glycine max L.) Akibat Penambahan Sumber N-organik dan Perbedaan Lama Fermentasi Pupuk Kandang Sapi

Soybean is leguminous plant whose productivity has decreased due to the carrying capacity of the land which is not productive. Organic fertilizers function to improve soil structureand make it easier for nutrients to be absorbed by plants. This study aimed to examine the effect of adding N-organic sources and differences in manure fermentation time on soybean growth. The research was carried out in February – June 2022 at the greenhouse and Plant Ecology and Production Laboratory, Diponegoro University. The study used a factorial experiment 3x3 Completely Randomized Design (CRD) with 4 replicates. The first factor is the addition of N-organic sources, namely A1 = manure, A2 = manure – gamal, and A3 = manure – lamtoro. The second factor was the fermentation time, namely B1 = 7 days, B2 = 14 days, and B3 = 21 days. The addition of N-organic sources had a significant effect on the number of leaves but had no effect on plant height, time of flower emergence, fresh root weight, and dry root weight. The difference in fermentation time had a significant effect on the number of leaves, wet root weight, and dry root weight but had no effect on plant height and time of flower appearance. There is an interaction between the addition of N-organic sources and the fermentation time of manure on wet root weight.Keywords: Incubation period; Manure; N-organic; Soybea