大豆不同群体叶面积指数及干物质积累与产量的关系

以垦农4号和垦鉴21号大豆为试验材料,研究了大豆在3种不同密度条件下的叶面积指数及干物质积累动态与产量的关系。结果表明:各品种在不同群体条件下叶面积指数的变化趋势大致呈一抛物线,叶面积指数与产量的相关性在V3和R1达显著水平,R3、R5和R6达极显著水平;不同种植密度、品种间的干物质积累动态均存在差异;各阶段干物质积累量与产量的关系,在R3呈显著正相关,R5呈极显著正相关;KJ21后期群体发育在高密度下仍能维持较高的叶面积指数和干物质积累量,适合密植。

Studies on the Relationship Between Yield and Leaf area Indexand their dry Matter Accumulation Dynamic on the different Population

The relationship between Yield and leaf area index and their dry matter accumulation were studied by using two soybean cuhivars which have high yield potency, under different population. This experiment raked Kennong No.4 and Kenjian No.21, a variety of soybean, as the experimental material The result showed that the leaf area index changed on parabola under different population densities and the corre lation coefficients of yield with the leaf area index were tending to positive correlation on V3andR1, and was significant on R3,R5andR6. The dry matter accumulation were various in different growing period and the correlation coefficients of yield with the dry matter accumulation were tending to positive correlation on R3, and was significant on R5.The experiment also indicated that the later population of KJ21 still maintained high leaf area index and dry matter accumulation, which benefit for high population densities.