摘要
试验结果表明,氮肥用量在0-200 kg/hm2的范围内,产量随氮肥用量的增加而提高,氮肥施用量40-240 kg/hm2比CK(无肥区)增产38.90%-169.45%,比只施用磷、钾肥的处理增产16.99%-129.94%。氮肥用量增加,单穴穗数、穗粒数增加;饱满千粒重、混合千粒重和饱满粒率下降。穗颈长、穗长、一次枝梗和二次枝梗数量、着粒密度增加;植株高度、单穴草重、生物产量、谷草比和经济系数提高。适宜的氮肥用量为160- 200 kg/hm2,不仅增产率高,而且其它性状也能得到改善。
The experiment showed that the yield of rice rose along with Nitrogen fertilizer increasing in the range of 0-200 kg/hm^2 and yield increased 38.90%-169.45% by using Nitrogen from 40 kg/hm^2 to 240 kg/hm^2, and that was 16.99%-129.94% higher than CK (no Nitrogen fertilizer and used phosphorus and potassium only) . If Nitrogen fertilizer applying amount increased, panicles, grains of panicle, neck culms length of panicle, length of panicle, thirst branch of panicle, second branch of panicle, grain density, height of plant, straw weight, biologic yield, grain/straw weight and economical coefficient increased, and full-1000-grain weight, mix-1000-grain weight and full grain percentage decreased. Feasible Nitrogen fertilizer amount is 160-200 kg/hm^2, and the yield will be increased and yield components and other components which related to yield will be also improved.
出处
《垦殖与稻作》
2005年第6期35-38,共4页
Reclaiming and Rice Cultivation
关键词
水稻
氮肥用量
产量
产量性状
穗部性状
rice
applying amount of fertilizer
yield
yield components
characteristic of panicle