摘要
以代表性品种中粳武运粳 8号和杂交中稻汕优 6 3为材料 ,研究高产水稻株型和籽产量形成的关系。结果表明 ,高产水稻的株型应为 :株高在适宜范围内的上限 ,穗下节间较长、基部第 1、2节间粗短 ,穗下节间占秆长的32 %～ 35 % ,茎生 3叶叶角和弯曲度小 ,茎生 5叶叶长配置合理 ;高产株型植株抽穗后的势粒比为 4 5 .0～ 4 9.0cm2·粒 -1。此时 ,水稻植株节间茎鞘基础物质积累高 ,茎鞘输出物质多 ,而茎鞘输出相对比例小。
The relationship between plant type indices after heading stage and yield formation was studied systematically with the mid season rice japonica cv. Wuyunjing8 and the indica hybrid rice cv. Shanyou63 as material. The results showed as follows: Plant type indices of high yield were that the plant height was at the uppermost appropriate length, the length of basal two internodes were shorter and thicker, the ratio of the length of uppermost internodes to that of stem was 32%-35%, winidng angels and splay angels of upper three leaves were little, and the sequence of length in leaves was rational. Photosynthetic potential grain ratio was 45.0 49.0 cm 2 per spikelet would made the accumulation matter of the stem and sheath was higher, and exporting matter was more and comparatively ratio lower.
出处
《中国农业科学》
CAS
CSCD
北大核心
2003年第1期115-120,共6页
Scientia Agricultura Sinica
基金
江苏省科委"九五"应用基础研究项目 (BJ990 5 8)
关键词
抽穗后株型
产量形成
水稻
势粒比
茎鞘物质运转
Rice
Plant type
Photosynthetic potential grain ratio
Exporting matter of culm and sheath
Yield
