底墒差异对夏玉米生理特性及产量的影响

研究了底墒差异对夏玉米生理特性及产量的影响。试验结果表明,在夏玉米生育期间极度干旱的条件下,以冬小麦生育期间灌拔节水和抽穗水(各40mm),夏玉米生育期间灌两水(共计100mm)的处理夏玉米产量最高,达7466.58kg/hm2。而且该处理的叶面积、光合速率、蒸腾速率等生理指标高于其余各处理,气孔阻力和叶温等生理指标则低于其余各处理,以上各生理指标的变化是由于前茬冬小麦不同生育期灌溉而造成的。本试验同时表明,研究作物的水分问题应与特定的种植制度相结合。

Effects of Different Soil Moisture Before Sowing on Physiologic Character and Yield of Summer Maize

The experiment was conducted at YuCheng Comprehensive Experimental Station to study the effect of different soil moisture before sowing on physiologic character and yield of summer maize. The experiment showed that in the condition of very droughty, the treatment which irrigated at jointing and heading stage in growth period of wheat and 100mm water in growth period of summer maize gained maize kernel 7466.58kg/hm2. The leaf area, photosynthetic rate and transpiration rate of the treatment were much higher than the others, but stomata resistance and leaf temperature were much lower. The variety of above physiologic index were caused by irrigation in growth period of winter wheat, so caused the difference of soil moisture before sowing. Because the difference of soil moisture before sowing, the yield of every treatment were also different. The experiment also showed study water problems of crops should be combined with specific planting system.