Laju Pengisian Biji pada Beberapa Varietas Kedelai dengan Berbagai Ukuran Biji
Nitrogen is an element affecting the growth and production of soybean plants. N available for plants affects leaf area, dry weight, and crop production. Soybean plant production is related to the accumulation rate of seed filling during the seed filling phase (R5-R7). The research aimed to evaluate the effect of N and seed size on the rate of seed filling. The experiment was conducted from July to November 2019 at the Cikabayan Experimental Station, Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor. The study used a randomized complete block design with two factors and three replications. The first factor was the urea doses of 0 and 50 kg urea ha-1. The second factor was soybean varieties with different seed sizes, namely Tanggamus, Anjasmoro, Grobogan, and Biosoy 1. The results showed that the application of N fertilizer to the plants did not significantly influence the rate of seed filling, but tended to increase the rate of seed filling at the end of the seed filling period. N fertilizer affected the amount of N remobilized and tended to increase the remobilized dry weight, even though not significant.
Keywords: dry weight, net assimilation rate, plant growth rate, seed filling rate, seed size