水稻群体特性与产量相关性的研究

Correlation Between Agronomic Properties of Population and Yield in Rice

用熟期和株高各不同的9个粳稻品种在沈阳田间进行2年试验。分析了产量因素、抽穗期、株高、叶片性状、干物重、群体生长率和净同化率与产量和产量因素间的相关。结果是饱满粒率和千粒重与产量有显著和极显著正相关;分蘖期的干物重和群体生长率及成熟期的群体生长率和净同化率与产量有显著的正相关。抽穗期、倒2片叶、倒3片叶面积和倒3片叶总面积与产量有极显著负相关,倒3片叶的长度与产量有显著或极显著的负相关,株高与千粒重有显著负相关。因此在沈阳地区的大面积主栽品种,应选用茎秆较粗的偏矮秆、叶片质量较好的穗粒兼顾型的中熟类型,比较容易获得高产。

A 2-year trial was conducted in Shenyang with 9 cultivars of Oriza eativa sp.Keng,which are different in maturity and plant height.Correlations between yield and heading stage,plant height,leaf char-acter,dry matter weight,crop growth rate,net assimilation rate was analysed.The result indicate that yield had a positive or negative correlations with these characters.It suggest that it will be easier to get a high yield if we plant semi-dwarf,mid-cultivars in Shenyang region which have thicker stem and quality leaves.