【摘要】 通过模拟计算得到一级生产水平下冬小麦和夏玉米的累积干物质动态曲线 .两年的计算结果和实测值都比较吻合 .研究表明 ,在黄淮海平原 ,可以把亩产吨粮作为冬小麦 夏玉米一年两茬平作粮田达到一级生产水平的指标 .若用中熟夏玉米套作代替早熟夏玉米平作 ,籽粒的年产量可增加一成 .通过对不同叶面积指数下干物质产量的模拟计算 ,得到一年两茬平作的干物质产量最大可达 46t·hm- 2 ,籽粒产量 1 9.1t·hm- 2 .更多还原

【Abstract】 By means of simulation models, the dynamic change of dry matter production by winter wheat and summer maize at production level 1 is obtained. The results show that the simulated values match well with the measured ones in 1990/1991 and 1991/1992. The grain yield 1000 kg·mu -1 ·yr -1 can be considered as a target yield for winter wheat followed by summer maize in the Huanghuaihai Plain without intercropping at the production level 1. If winter wheat followed by intercropped medium maturity summer maize is adapted, instead of the winter wheat followed by early maturity summer maize without intercropping, the total grain yield of the both crops is increased by more than 10%. The simulations for various LAIs show that the dry matter production and the grain yield of the two crops within a year without intercropping can reach up to 46 and 19.1 t·hm -2 , respectively.更多还原