灌水与非灌水对不同基因型小麦群体动态及其产量相关性的影响

在灌水和非灌水条件下,研究了5个不同基因型小麦群体动态的变化及其与产量的相关性表现。 结果表明,不同基因型小麦在灌水小区的群体指标明显高于非灌水小区;叶面积指数(LAI)变化呈“S”形曲线,且与 产量有很大的相关关系;在干旱条件下全生育期的LAI变化幅度较灌水条件下小,且拔节以后的LAI对产量影响 较大;不同处理下各基因型小麦群体变化对产量的贡献不同。因此,在旱作农业生产中,小麦除了选用大穗型品种 外,还要力求保持小麦生育后期有较高的绿叶面积,并使各因素协调发展,以获得较高的经济产量。

Effect of different irrigations on dynamic population and the correlation with yield of different genetic wheats

The article studied the changing condition of dynamic population and the relation with yields of five different genetic varieties under different irrigations. The results showed that the population of different genetic variety under irrigation was higher than ones under no irrigation;The change of LAI appeared "S "curve, and had high correlation coefficient with yield;The change trend of LAI of all growing stages were smaller than those under irrigation,and LAI after jointing had larger effect. But the population of different genetic varieties had different contributions to winter yield. So besides choosing big ear,larger green area at later growing stages should be maintained,and every aspect should be developed harmoniously in order to get higher economic yield.