摘要
以杂交水稻冈优527为材料,研究了水稻在三角形强化栽培、正方形强化栽培、抛秧栽培和常规高产栽培等不同栽培方式下的生理指标、灌浆特性及产量。结果表明,在三角形强化栽培技术体系下适宜密度的水稻群体具有独特的优势:在关键生育时期叶面积指数(LAI)较大,齐穗后剑叶衰老减缓,光合速率较高,能够充分发挥个体生长优势,贮存积累并向穗部转运较多的光合同化产物,不仅保证了强势粒的灌浆,而且弱势粒灌浆也较为顺畅,产量构成因素得到优化配置,从而获得高产。
With the hybrid rice Gangyou 527 as the material, physiological indices, grain filling features and grain yield were studied among different cultivation methods, including planting method of triangle of system of rice intensification （TSRI）, system of rice intensification （SRI）, broadcasting rice seedling and traditional cultivation. The results showed that TSRI with suitable planting density had the unique superiority in population quality with bigger leaf area index in the key growth stages, delayed aging of flag leaf after heading, and higher photosynthetic rate. TSRI could also give full play to the growth of every individual plant and more photosynthetic assimilates were produced, accumulated and transported into panicles, which not only ensured the grain filling of superior grains but also improved greatly the grain filling of inferior grains on a panicle. Consequently, a higher grain yield was achieved through the optimization of structure of yield components.
出处
《杂交水稻》
CSCD
北大核心
2006年第6期60-65,共6页
Hybrid Rice
基金
国家粮食丰产科技工程(2004BA520A05)
四川省科技厅重点项目资助
关键词
水稻
三角形强化栽培
光合特性
物质积累与转运
籽粒灌浆
产量形成
rice
TSRI
photosynthetic characteristics
accumulation and transportation of dry matter
grain filling
yield formation
