Abstract:

Under the background of “zero growth” of fertilizers in the Ministry of Agriculture and Rural Affairs of PRC, light and simplified fertilization methods based on the requirements of nitrogen reduction, stable rice yield and reduced fertilization times have higher requirements for fertilizer products. In this experiment, the effects of different brands of slow-release fertilizers on the yield and fertility of hybrid rice were explored through the comparative test of nitrogen, such as Dao Jianqiang (N 26%、P₂O₅ 10%、K₂O 15%), Hao Legeng (N 18%、P₂O₅ 5%、K₂O 10%), Green Energy (N 26%、P₂O₅ 10%、K₂O 15%), Wei Si (N 26%、P₂O₅ 10%、K₂O 15%).The results showed that the application effects of the four brands of slow-release fertilizer on different fields and different rice varietiesare were slightly different. In Lihu field, Fenshui Town (rice variety Yongyou 12), the treatment with the highest dry grain yield was Wei Si, with a yield of 9 761.9 kg·hm^-2, which was 43.5% higher than no fertilizer (CK) and 1.6% higher than conventional fertilization (NPK).Similar rules were also observed in the test site of Leng Shui field (rice variety Yongyou 15) in Baijiang Town. The highest yield was also Wei Si, which was 9 542.7 kg·hm^-2, 44.5% higher than no fertilizer (CK) and 4.1% higher than conventional fertilizer (NPK). When other slow-release fertilizer brands were applied, there was no significant difference in rice yield compared with the conventional fertilization (NPK).

Key words: rice, slow-release fertilizer, yield