Abstract:

To clarify the application effect of controlled-release fertilizer on different soybean varieties under local production conditions, and to change the rough and indiscriminate traditional fertilization mode, 7 soybean varieties were used as materials, and the effects of three fertilization treatments [no fertilizer (CK), traditional compound fertilizer (FH) and special controlled-release fertilizer (KS)] on agronomic traits, dry matter accumulation, yield, fertilizer contribution rate and fertilizer agronomic efficiency of soybean were studied. The results showed that compared with compound fertilizer, the plant height, pod number per plant and grain number of per plant under controlled-release fertilizer treatment increased by 2.68-4.35cm, 3.82-6.45 and 5.20-14.94, respectively. And the total dry weight of root, stem, pod and plant increased by 0.26-0.39, 0.68-1.24, 4.61-7.52 and 5.55-8.76g, respectively. The yield increased by 5.54%-9.47%. Fertilizer contribution rate and fertilizer agronomic efficiency were 4.56%-7.00% and 0.37-0.67 higher than those of compound fertilizer treatment, respectively. Controlled-release fertilizer could improve the agronomic characters of soybean and increase the soybean yield. Varieties and fertilization mode had significant effects on soybean yield, especially the fertilization mode. ‘Qihuang 34’, ‘Weidou 1897’ and ‘Jidou 12’ had higher fertilizer contribution rate and fertilizer agronomic efficiency, and relatively high yield, which are suitable for planting in this region.

Key words: summer soybean, controlled-release fertilizer, agronomic traits, yield, fertilizer agronomic efficiency