摘要
研究表明，１．亚种间杂交稻与汕优６３比较，在产量形成上有如下特点：一是分蘖力弱；二是抽穗前的干物质生产量多，而抽穗后的干物质生产量少；三是库容量大，但叶面积系数不高，高效叶面积率低，抽穗期单位叶面积负担的库容量高；四是每穗粒数多，结实率低，秧数少。２．亚种间杂交稻高产组合选配的主要指标有：分蘖力强、干物质生产能力强、库容量和叶面积均大，但库容量／叶面积比较低。３．亚种间杂交稻高产栽培的对策是增加穗数，减少粒数，在保持较高的库容量的情况下，尽可能扩大叶面积，增加干物质生产量，抽穗后加强田间管理，防止早衰。
Rearch Sbowed:1.Inter-subspecific hybrid rice,compared with Shanyou 63,hadthe following characteristics in yield formation:(1)Weaker tillering ability;(2 )More dry matterproduction before heading, but less after heading;(3)tuger sink capacity,but no higher leaf areaindes (LAI),’lower rate of high effective leaf area and large sink capacity born by unit leaf area athading;(4) More spikelets per panicle, lower setting percentage and less panicles. 2.The mainindexes breeding with yielding combination of inter-subepoific hybrid rice were:strong tilleringability,strogn dry matter preduction ability, lar8e sink capacity and leaf area, but lower rate betweensink capacity and leaf area. 3. The cultural countermeasures for high yield in the inter-subspoifichybrid rice were:Increasing the number of panicles,decreasing the number of spikelets per panlcle,while larger sink capacity was maintained, increase leaf area as large as possible to promote dry matterproduction,giving more attention to field management to prevent early senescence after heading.
出处
《江西农业学报》
CAS
1995年第2期77-82,共6页
Acta Agriculturae Jiangxi
基金
江西省科委和江西省自然科学基金
