Impact of Different Irrigation Amounts on Annual Water Utilization of Winter Wheat and Summer Maize Under Drip Irrigation
In order to investigate the effect of irrigation rate on annual water utilization of winter wheat and summer maize under drip irrigation,the influence of different irrigation amounts(wheat season,W1-W6:0,20,40,60,80 and 100 mm/time;maize season,M1-M6:0,15,30,45,45,60 and 75 mm/time)on growth,leaf SPAD value and photosynthetic physiological characteristics of wheat,and yield and water use of wheat and maize were studied by the field experiment.The results showed that drip irrigation improved the SPAD value and the photosynthetic physiological characteristics,and the yield of wheat and maize and their yield components were increased accordingly.With the increase of irrigation amounts,the SPAD value,photosynthetic rate,transpiration rate,yield of wheat and maize and the annual total yield of wheat and maize all increased first and then decreased.The total water consumption of wheat and maize increased with the increase of irrigation amounts,and the leaf water use efficiency gradually decreased with the increase of irrigation amounts.Grain water use efficiency and irrigation water use efficiency of wheat and maize showed the trend of first decreasing,then increasing and then decreasing with the increase of irrigation amounts.In different irrigation treatments,treatment W3 and treatment W4 were more conducive to improving the SPAD value of wheat leaves,and treatment W5 increased the photosynthetic rate more significantly.Treatment W4 improved the wheat yield,and treatment W3 was more beneficial to improve the water utilization efficiency of wheat.Treatment M5 significantly improved the yield and irrigation water use efficiency of maize,and the grain water use efficiency was also relatively high compared with other treatments.For wheat and maize annual yield,treatment W5+M5 showed the best effect on yield increase.
Drip irrigationIrrigation amountPhotosynthesis characteristicsWheatMaizeWater use
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NSTL
万方数据
维普
