The study was conducted to find out the effects of slow-released fertilizer(SRF) on the growth and yield of soybeans and in the soil. The plant height of soybeans was showed the higher in the SRF than in urea at early growth stage, but that showed the...
The study was conducted to find out the effects of slow-released fertilizer(SRF) on the growth and yield of soybeans and in the soil. The plant height of soybeans was showed the higher in the SRF than in urea at early growth stage, but that showed the very similar results in both of SRF and urea at late growth stage. The chlorophyll content and photosynthetic activity of soybeans were higher in the SRF than in urea at 40days after sowing. Grain yield was not significantly different between in the SRF and in urea. Total nitrogen content in the grain and shoot of soybeans was showed higher in the SRF than urea. Nitrogen uptake in the grains of soybeans was similar results in both of the SRF and urea, but that of SRF in the shoot was higher than in urea. Efficiency of nitrogen in the SRF of soybeans was higher than in urea by 13.1%. Nitrogen content in the soil after experiment of SRF was lower than in urea.