郑州市夏玉米生物量积累与增长分配规律分析

根据郑州市1994—2006年夏玉米生物量观测资料分析了不同生育期单株各器官的生物量变化和增长分配规律，得出：在玉米整个生长期，单株各器官的重量变化在不同生育阶段不同，结果导致各部分干重占全株干重百分比的差异。总体上看，拔节前叶片增长较快，占比率最高，达68％～88％；叶鞘增长也快但所占比例一直不大，最高时占20％；茎在拔节一抽雄期增长较快，最高时占41％；果穗在抽雄后直线增长，最高时占63％。同时，通过定量分析得到了各器官在整个生育期增长分配率的变化过程，模拟取得不同气候年型生物量积累曲线，研究结果可为当地玉米生长的定量化模拟提供参考。

A Study on Accumulation and Increment Distribution of Biomass of Summer Maize in Zhengzhou

Based on the data of the observed biomass of summer maize in 1994-2006 in Zhengzhou City, the accumulation and increment distribution of the dry matter from different organs of the single plant in different growth stages were analyzed. The results showed that the dry matter of leaves increased quickly before jointing stage. The ratio of the leaf dry matter took 68%- 88% of the total dry matter of the plant. The dry matter of leaf sheath increased quickly as well with the highest ratio of 20% of the total dry matter of the plant in the jointing stage. The dry matter of the stem reached at the peak in the heading stage with 41% of the total dry matter of the plant. After heading, the dry matter of the ear increased dramatically with 63% of the total dry matter of the plant.