集雨补灌冬小麦套作玉米复合群体生理生态特性研究

Eco-physiological characteristics of winter wheat-corn intercropping systems under rainfall catchment and supplementary irrigation

摘要: 试验研究表明补充灌溉可加大复合群体冠层一大气温差。冬小麦和玉米套作全生育期叶片平均光合速率较单作分别提高2．77％和24．85％，且与产量呈显著正相关。关键期补充灌溉可提高复合群体内相对湿度，进而提高光合速率和作物产量，实施适量分次补灌技术可挖掘组分潜力。

Abstract: The field experiments show that supplementary irrigation can enhance the difference between the temperatures of leaf and atmosphere．The average photosynthesis rate of intercroppcd wheat and corn can be improved by 2．77％ and 24．85％ respectively than that of single planting in the whole growth stage．and it is positively correlated to the yield．Supplementary irrigation in critical stages can enhance the relative humidity in the canopy，and improve the photosynthesis rate and yield.