摘要
四川东部地区,长期施用有机肥后,土壤全N量和有机质增加,水稻产量提高。杂交水稻的产量主要取决于有效穗数,相关系数达0.96。分蘖期土壤NH_4^+—N如能保持在1.50～1.70mg/100g土以上,功能叶片游离氨基酸不低于80mg/100g鲜样,每公顷有效穗即可达到225万,产量可超7500kg。土壤NH_4^+—N与植株功能叶片游离氨基酸和叶绿素的变化规律相似,与功能叶片可溶性糖的变化规律相反。说明功能叶片游离氨基酸、叶绿素和可溶性糖的含量能指示土壤氮素水平,反应水稻的氮素营养生理,可用于指导施肥。
A field experiment was conducted on a red brown soil to study the effect of N nutrient physiology on the yield formation of rice crop in the east part of Sichan, China. The application of organic matter for a long time did not only increase both of nitrogen content and organic matterials in paddy soils, but also increase the yields of rice crop. The correlation coefficient for rice yield vs ears was 0.96. It suggests that the maximum yield of rice may exceed 7500kg/ha in need of about 225 hundred thousand ears of the crop. The content of NH_4^+-N in the soil should be 1.5～1.7mg/100g. soil, while the rate of free amino acid in the first fullyexpanded leaves is above 80ng/100g·FW in the tillering stage. The variation of free amino acid and chlorophyl in the leaves is in the same way as NH_4^+-N in the soil, except for the soluble sugar. The content of free amino acid, chlorophyl and soluble sugar can indicate the level of NH_4^+-N in the soil. They can also be used as the indexes for fertilizer application.
出处
《西南农业大学学报（自然科学版）》
CSCD
1989年第2期164-168,共5页
Journal of Southwest Agricultural University
关键词
水稻
氨基酸
土壤
氮素
产量
paddy
amino acid
yield
soil nitrogen
Sichuan.
