高产水稻生育前期株型指标的研究

Study on Index of Plant Type in Early Stage of High Yield Rice

试验于 1999～ 2 0 0 0年在扬州大学农学院试验场进行 ,以两个代表性品种 (组合 )为材料。采用不同的栽培措施 ,研究高产水稻生育前期的株型指标及其与产量的关系 ,结果表明 :有效分蘖期 (N- n期 )植株叶片松散度适宜 ,顶部三叶松散度之和 7.7～ 7.8度 ,叶鞘载叶量较小。拔节期汕优 6 3叶片松散度宜小 ,顶部 3叶松散度之和 7.7度左右 ,叶鞘载叶量 0 .36～ 0 .38cm2 / m g;武运粳 8号叶片松散度宜大 ,顶部 3叶松散度之和 6 .0度左右 ,叶鞘载叶量在 0 .2 7～ 0 .34cm2 / mg。

The experiments were carried out in the experimental field of Crop cultivation in Yangzhou University 1999~2000,and the relationship between indice of plant type in critical stage of effective tiller emergence, shooting stage, heading stage and yield was studied in population of different yield with mid season rice hybrid, cv. Shanyou 63 and Japonica, cv. Wuyunjing 8 as material. The results were as follows: Leaf angel and length of plant were large and leaf loose degree was moderate. The sum of loose degree in top 3 leaves of Shanyou 63 and Wuyunjing 8 was 7.7~7.9, espectively, Jointing stage the leaf length was moderate. The leaf angle and loose degree of Shanyou 63 were smaller, and the sum of loose degree in top 3 leaves was 7.7 and the leaf area per leaf sheath weight was 0.36 to 0.38 cm 2/mg. The leaf loose degree of Wuyunjing 8 was large, and the sum of loose degree in top 3 leaves was about 6.0 and the leaf area per leaf sheath weight was 0.27 to 0.34 cm 2/mg.