【摘要】 通过试验和观测,分析了云南春夏秋冬四季玉米的叶面积指数、干物质生产、干物质在不同器官中的分配、不同发育期的光能利用率及四季光温分布与各季玉米生长发育的对应关系。结果表明:(1)四季玉米不同发育期生产的干物质量与日照时数和叶面积指数的乘积呈显著正相关;(2)籽粒干重占总干物重的比例与各季播种玉米灌浆期≥10℃积温呈正相关;(3)春玉米的产量受制于灌浆期的光合产物,而其它播期的玉米产量则受库容小或运输不畅的限制;(4)播种期的安排应因地制宜,只有将灌浆期安排在光、热条件较好的时段,才能获得高产。更多还原

【Abstract】 The field experiments on maize date of planting in the different seasons were conducted from 1996 to 1997 to determine the relationship between growth and development of maize and the climate conditions in the different seasons. The results showed that the dry matter in the different growing periods of maize and in the different seasons increased significantly as the sunshine duration and LAI increased. The proportion of seed dry matter was positive relative with the accumulated temperature(≥10℃)during the filling stage. The yield of maize planted in the spring depended on the photosynthetic products during the filling stage, while the yield of maize planted in other seasons was limited by bad stored conditions and transport. The filling stage should be arranged in the time of the best light and heat conditions in order to get high yield.更多还原