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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。
The effects of different soil moistures before sowing on physiological characteristics and yield of summer maize were studied. The results showed that under the condition of extreme drought during the growth of summer maize, the yield of summer maize was the highest with irrigation of two water (100mm total) during the growth period of summer maize, reaching 7466.58 kg / hm2. Physiological indexes such as leaf area, photosynthetic rate and transpiration rate were higher than those of other treatments, and the physiological indexes such as stomatal resistance and leaf temperature were lower than those of the other treatments. The changes of the above physiological indices were due to the different growth periods Irrigated. This test also shows that the study of crop water problems should be combined with the specific planting system.