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为了研究叶面积指数(Leaf area index,LAI)与产量的关系,以水稻合美占、粤晶丝苗2号品种为试验材料,采取比叶质量法对叶面积指数进行了测定,并对水稻不同生育期LAI与产量及其产量因素的关系进行了研究.结果表明:不同生育期LAI与产量、单位面积穗数和每穗粒数呈正相关,与千粒质量和结实率呈负相关,决定系数平均达0.4~0.9以上,且粤晶丝苗2号决定系数整体高于合美占;提高不同生育期LAI,不能同步提高产量4因素.
In order to study the relationship between leaf area index (LAI) and grain yield, leaf area index (LAI) was measured by using specific leaf mass ratio The results showed that there was a positive correlation between LAI at different growth stages and grain yield per unit area, spikelets per panicle and grain weight per spike, negatively correlated with grain weight and seed setting rate The coefficient averaged over 0.4 ~ 0.9, and the coefficient of determination of Yuejing Si Miao No. 2 was higher than that of Hemaiu. The improvement of LAI at different growth stages could not simultaneously increase the yield by 4 factors.