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利用改进了的产量生态学模型SUCROS ,对黄淮海平原林网保护区夏玉米的生长过程进行了数值模拟 ,并与田间监测资料做了比较 ,分析了影响夏玉米生长的各种生理、生态学因子 .结果表明 ,改进后的模型能成功模拟夏玉米的生长过程 ,考虑病虫害、杂草影响后 ,模型输出的叶面积指数、器官生物量与生长监测资料十分一致 .与单作农田比较 ,由于林网地区小气候条件的改善 ,夏玉米单产提高 6 8%左右 .播种密度、播种日期与籽粒产量关系的数值试验显示该区高产密度标准为 6 75～ 7 5 0 (高肥水田块可达 9 0 0 )株·m-2 ,最佳播种期为5月 2 1日～ 6月 5日 .模拟“凉夏”天气对黄淮海平原南部地区夏玉米生长的影响时发现 ,气温每降低 1℃ ,生育期延长 3～ 4d ,与“低温”伴随的“寡照”是减产的直接原因 .
The improved yield ecology model SUCROS was used to simulate the growth of summer maize in the forest-hibiscus shum in the Huang-Huai-Hai Plain and to compare with field monitoring data. The effects of various physiological and ecological factors affecting the growth of summer maize The results showed that the improved model could successfully simulate the growth of summer maize and the leaf area index and organ biomass output of the model were in good agreement with the growth monitoring after considering the influence of pests and weeds.Compared with monoculture farmland, The improvement of microclimate conditions in Linlin area increased the yield of summer maize by 68%, and the numerical test of the relationship between sowing density, seeding date and grain yield showed that the high yield density standard in this area was 6 75 ~ 75 0 (up to 9 0 0) strain · m-2, and the optimum sowing date was from May 21 to June 5. The effects of “cool summer” weather on summer maize growth in the southern Huang-Huai-Hai Plain were studied. , Prolong the growth period of 3 ~ 4d, with the “low temperature” accompanied by “oligospermia” is the direct cause of yield reduction.