沟谷地春玉米干物质积累、分配与转移规律的研究

Study on Law of Biomass Accumulation, Distribution and Transference of Spring Corn in the Gully Region

1996～ 1998年在山西省隰县黄土高原残垣沟壑区进行了沟谷地春玉米干物质积累、分配与转移规律的研究。结果表明 :春玉米植株个体干物质积累与生育进程间的关系呈S形曲线变化。春玉米干物质在各器官的分配随生长中心的转移而发生变化 ,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 ,各器官干物质开始向子粒转移 ,果穗成为光合产物的分配中心。在栽培上 ,应使各器官向子粒转移的干物质总量控制在 2 0

Experiment on biomass accumulation, distribution and transference of spring corn was carried out in the gully region at Xixian, Shanxi. Results showed that biomass accumulation of spring corn plants accords with the S-shaped curve as the plant grows and develops. Biomass distribution among all of the organs changes as the growth center transfers. Biomass mainly transfers to the leaves before the ear bearing stage, and to the stems and leaves afterwards. The biomass of all of the other organs begins to transfer to the grains after flowering stage and the ears become the center to which the photosynthetic products mainly transfer. As for crop cultivation practices, the proportion of the total biomass distrubuted to the grains should be limited under 20%.