摘要
为明确硫酸钾镁肥在水稻上的施用效果,采用大田试验的方法,分别设置5个不同施肥量处理和4个不同施肥时期与分配比例处理,研究了不同硫酸钾镁施用量、施用时期和分配比例对水稻生长、产量和品质的影响。结果表明:硫酸钾镁用量为1023.34 kg/hm2的处理水稻产量、粗蛋白质含量、粗淀粉含量和还原型维生素C含量最高。硫酸钾镁全部基施的水稻,其产量、粗淀粉含量和还原型维生素C含量最高。硫酸钾镁基施50%,拔节期追施20%,抽穗期追施30%的水稻,其粗蛋白质含量最高。从提高产量和改善稻米品质的角度综合考虑,硫酸钾镁的最佳施用量为1 023.34 kg/hm2,最佳施用方法为全部基施。硫酸钾镁基施50%,拔节期追施20%,抽穗期追施30%对改善水稻品质有明显作用。
In order to know the fertilizer efficiency of sulphate-potassium magnesium in rice, the effects of different applying amount （ 5 treatments） and period （4 treatments） of sulphate-potassium magnesium on growth, grain yield, and quality of rice were studied using the method of field experiment. The results showed that：the grain yield, crude proteincontent, crude starch content, reduction-type vitamin C content of rice with 1 023.34 kg/ha of sulphate-potassium magnesium application was higher than the other four treatments. The grain yield, crude starch content, reduction-type vitamin C content of rice with all base application of sulphate-potassium magnesium was the maximal. The crude protein content of rice with 50 % of base application, 20 % of applying at the jointing stage, 30 % of applying at the heading stage was the maximal. The optimal amount of sulphate-potassium magnesium for rice grain yield increasing and quality improving was 1 023.34 kg/ha, and the optimal method of sulphate-potassium magnesium application was at the all base application. The treatment of sulphate-potassium magnesium application with 50% of base applying, 20% of applying at the jointing stage 30% of applying at the heading stage, could also significantly improve the rice quality.
出处
《华北农学报》
CSCD
北大核心
2008年第3期194-197,共4页
Acta Agriculturae Boreali-Sinica
基金
广东省自然科学基金项目(33135)
韶关市技术创新项目(韶科(教)2007-08)
关键词
硫酸钾镁肥
水稻
生长
产量
Sulphate-potassium magnesium
Rice
Growth
Yield
