摘要
采用不同生态类型的6个主栽品种和组合,分别在热带(IRRI)和亚热带(云南涛源)不同生态区研究了高产水稻对氮的吸收、分配、运转和生理效率。结果表明,涛源比IRRI平均产量高49%,总氮量高25%,吸氮量差异主要在营养生长期。在涛源水稻营养生长期吸氮量高达62%,而IRRI较低,仅42%。在涛源开花期叶氮的运转率高达71.0%。涛源的氮生理效率比IRRI高20%。每100 kg产量需氮量,涛源为1.80 kg,而IRRI为2.15 kg。产量与氮生理效率呈正相关。
In 1995 and 1996, six different high-yielding rice varieties were separately planted in subtropical （Taoyuan Township in Yongsheng County in Yunnan province） and tropical （IRRI） area, to investigate the difference and physiological efficiency in absortion, distribution and utility of nitrogen in rice plant. Results indicated that, 49 % more grain yield was harvested at Taoyuan than that at IRRI correspondingly, 25 % more nitrogen was absorbed. The difference of nitrogen absorption was mainly shown in vegetative stages, during which period 62 % of total nitrogen was absorbed at Taoyuan, but only42% at IRRI, and in flowering stage 71% nitrogen in leaf was transferred to panicle at Taoyuan. At IRRI, 2.15 kg nitrogen was required to produce every 100 kg grain rice, but at Taoyuan only 1.8 kg required,which indicated that the nitrogen physiological efficiency at Taoyuan was 20 % higher than that at IRRI.
出处
《西南农业学报》
CSCD
2006年第3期400-403,共4页
Southwest China Journal of Agricultural Sciences
基金
国际水稻所和云南省科技厅国际合作项目
中国水稻所水稻基金项目的资助
关键词
高产水稻
氮
运转率
氮生理效率
high-yielding riee
nitrogen
transferring ratio
physiological efficiency
