摘要
以粳稻品种武香粳 9号为材料 ,研究了 SRI(system of rice intensification)下植株生理特性、群体发育特点及高产栽培技术。结果表明 ,在 SRI方式下 ,水稻根系活力增强 ,叶片可溶性糖、非蛋白氮、丙二醛和脯氨酸含量增加 ,营养器官的物质转运率提高 ,群体质量明显改善 ;但群体茎蘖数和穗数不足 ,限制了 SRI的产量。在 SRI条件下 ,双本栽插能显著提高水稻群体茎蘖数 ,改善营养器官物质的运转和群体质量 ,有助于提高 SRI的产量 ;增施氮肥在提高水稻群体茎蘖数的同时降低了营养器官物质的转运 ,因此不宜过分依赖增加氮肥来提高
Rice physiological characteristics and population development under SRI (system of rice intensification) condition were studied by using japonica cultivar Wuxiangjing 9. Results showed that SRI significantly enhanced root activity, increased soluble sugar, non protein nitrogen, proline and malondialdehyde (MDA) contents in leaf, dry matter translocation percentage from vegetative organs to grains, and improved population quality remarkably. Rice yield, however, was limited by lower tiller number and panicle number of plant population. Under SRI condition, planting two seedlings per hill could increase tiller number of plant population, dry matter translocation percentage from vegetative organs to grains and improve population quality, which was in favor of yield increase. With increasing nitrogen rate,tiller number of plant population increased,whereas dry matter translocation percentage from vegetative organs to grains decreased, suggesting yield increase under SRI should not rely on the excess nitrogen rate.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2003年第1期31-36,共6页
Chinese Journal of Rice Science
基金
国家杰出青年科学基金资助项目(3972 50 2 1 )
中荷国际合作资助项目
关键词
强化栽培
植株生理
群体发育
水稻
节水栽培
高产栽培
产量形成
rice
system of rice intensification
physiological characteristics
water saving management
high yield cultivation
