包膜控释氮肥与普通氮肥配施对小站稻产量的影响

Effectsof Coated Controlled-release Urea Combined with Conventional Urea on Yield Formation of Xiaozhan Rice

为研究包膜控释氮肥(CRU-N)与普通氮肥(CK-N)不同配施比例对小站稻产量的影响,为小站稻高产高效施肥技术提供理论基础。本研究设置5个处理,分别为:CK(不施氮肥)、T1(CRU-N∶CK-N 80%∶20%)、T2(CRU-N∶CK-N 70%∶30%)、T3(CRU-N∶CK-N 60%∶40%)和T4(CRU-N∶CK-N 50%∶50%)处理,测定成熟期剑叶SPAD值、干物质质量(DM)和产量(GY)及其构成因素。结果表明:与CK相比,不同配施比例处理SPAD值显著提高43.49%~57.86%;显著提高DM和GY幅度为37.3%~86.86%和14.86%~52.14%,T2处理DM和GY最高达12397.33 kg·hm^(-2)和5478.00 kg·hm^(-2),比CK提高86.86%和52.14%;与CK相比,不同配施比例显著提高穗数、每穗粒数、千粒质量,T2处理穗粒数和千粒质量最高。综上,在本试验条件下,包膜控释氮肥(CRU-N)与普通氮肥(CK-N)配比为70%∶30%时,小站稻品种金稻919能够获得最高产量。

The research on the effect of different application ratios of coated controlled-release nitrogen fertilizer(CRU-N)and common nitrogen fertilizer(CK-N)on the yield of Xiaozhan rice was carried out to provide a theoretical basis for the development of fertilization technology for increasing yield of Xiaozhan rice.A total of 5 treatments were set up in this study,including:CK(no nitrogen fertilizer),T1(CRU-N∶CK-N 80%∶20%),T2(CRU-N∶CK-N 70%∶30%),T3(CRU-N∶CK-N 60%∶40%)and T4(CRU-N∶CK-N 50%∶50%)treatments.The effects of different application ratios on the SPAD,dry matter weight(DM),yield(GY)were determined.The results showed that compared with CK,the treatments with different application ratios all significantly increased the SPAD,the increase rate was 43.49%-57.86%;DM and GY increase were 37.3%-86.86% and 14.86%-52.14%,T2 treatment achieved the highest DM and GY,with 12397.33 kg·hm^(-2) and 5478.00 kg·hm^(-2),compared to CK,increased by 86.86% and 52.14% respectively.Compared with CK,the number of spikes,the number of grains per spike and the thousand-grain weight were significantly increased by different application ratios,and the number of grains per spike and the thousand-grain weight of T2 treatment were the highest.In summary,the optimal ratio of coated controlled-release nitrogen fertilizer(CRU-N)and common nitrogen fertilizer(CK-N)is 70%:30%,which is the most effective for improving the yield of Xiaozhan rice'Jindao 919'.