杂交水稻不同品种的产量及相关性状分析

Yields of Different Hybrid Rice Varieties and their Correlated Characters

2004年在贵州省三都县普安镇进行了4个杂交水稻品种比较试验，对其产量及相关性状进行了分析。结果表明：冈优527产量最高，为609．2kg／667m^2。比其它品种增产9．4％～16．6％；Ⅱ优多系1号次之，具有较理想的分蘖，较高的成穗率和较适宜的叶面积系数；冈优527、Ⅱ优多系1号的实粒与顶3叶比适中，产量稳定，可作为贵州省三都县普安镇的主推品种。4个品种有效分蘖与各阶段分蘖呈正相关，不同品种叶序、长、宽闻存在不同程度正相关系，选择适宜叶面积系数，能够提高成穗率、粒叶比,提高产量。

The field test of four hybrid rice varieties were conducted to compare their yields and correlated characters in Pu-an town, Sandu county, Guizhou in 2004. The results showed that the yield of Gangyou 527 was the highest （609. 2kg/667m2）, 9.4%- 16.6% higher than yields of other three hybrids and the yield of Ⅱ Youduoxi 1 with the good tillering ability, higher spiking rate and proper leaf area coefficient was the second. Gangyou 527 and Ⅱ Youduoxi 1 possess proper ratio between the setting number and last three leaves, and stable yield so it should be mainly popularlsed in Pu-an town, Sandu county. There was the positive correlation between the effective tiller and the tiller in different growth stage of four tested varieties, and there existed certain positive correlation between length and width of different position leaf in different varieties. The yield and setting rate can be improved by selecting proper leaf area coefficient.