春玉米干物质积累、分配与转移规律的研究

本文阐明了掖单４号春玉米，在不同施肥处理下，干物质积累。分配及转移规律。结果表明，干物质积累与生育进程间的关系表现为Ｓ形曲线变化，根据干物质增长曲线可将春玉米植株生长过程划分为指数增长期、直线增长期和缓慢增长期，干物质增长速度表现为单峰曲线。春玉米干物质在各器官的分配是随生长中心的转移而发生变化的：小喇叭口以前干物质主要分配在叶片中，之后转为茎、叶，散粉后生长中心向果穗转移，果穗成为光合产物分配中心，春玉米干物质积累与分配的变化是自身的生理变化所决定的，外界环境因素能影响其数量的大小。散粉后，各器官干物质开始向籽粒转移，在栽培上，应使各器官向籽粒转移的干物质总量控制在２０％以下。

A Study on the Regularity of Accumulation ,Distribution and Translation of Dry Matter in Spring Maize

his article clarified the regularity or accumulation,distribution and translation of dry matterwith Yedan No. 4 of Spring maize in four different fertilzer application treatinents. The main resultsare as follow. It shows a slow-fast-slow carve to the whole process of dry matter accumulation ofspring maize. The process can be divided into three grow stagges,they are exponential growing period ,linear-growing period. and slow-growing period. Speed of dry matter accumulation shows,a singlepeak cu rve. Distribution of dry matter in different organs changed with the growth centre change.Before floet diferentiation period in male ear,dry matter mainly distributed into leaf blade, later, intostem and leaf blade. After flowering period,the organ of growth centre was female car,and as drymatter distribution cetre,The chan ges of accumulation and distribution of dry matter are decided byphysiological effect of maize plant,environmental factor only fluences its quantity. After flowering,thedry matter in organ s are tran slated to kernels,We consider total translated amount of the dry matterneed to be controlled under 2 0%on cutural practices.