公顷产量13.7t～15.9t 春玉米干物质生产分配规律及其指标的研究

本研究探明了掖单13、中单2号等4个品种在公顷产量13.7t～15.9t条件下干物质累积分配规律.建立了不同品种群体和个体干物质累积的Logistic方程,提供了不同品种全株干物质累积的最大增长速率,平均增长速率及全株生物量的动态参考指标;阐明了茎叶、籽粒干重动态变化规律,提供了不同品种茎叶干重和籽粒增长速率等动态参考指标;查明了不同品种干物质分布、移动规律的共性和差异,掖单13等紧凑型品种是同化产物移动率高,经济系数也高的品种,中单2号则相反;分析了籽粒干物质的来源及不同品种之间的差异.

STUDIES ON THE REGULARITY OF DRY MATTER ACCUMULATION AND DISTRIBUTION AND ITS INDEXES OF SPRING MAIZE OF 13. 7-15.9 T/HA YIELD

The regularity of dry matter accumulation and distribution was studied with spring maize CV.Yedan No.13 and Zhundan No.2 and other four varieties under the condition of 13.7-15.9t/ha yield.The logistic equation of dry matter accumulation of individuality and group on different varieties was established.The maximal growing rate,average growing rate of dry matter accumulation of whole plant and the dynamic indexes of whole plant biological production was put forward on different varieties.We expounded the changing regularity of dry weight of stem,leaf and seed,and provided dynamic indexes of the growing rate of stem,leaf and seed dry matter on different varieties.The general character and differences of distribution and movement regularity of dry matter on different varietes were made clear.The movement ratio of assimilative matter and economic coefficient of CV.Yedan No.13 and other upright-leaf varieties are high,but CV.Zhundan No.2 is opposite.We also analyzed the dry matter source of seed and female tassel and the differences among different vareities.