Effects of Water and Air Interaction on Physiological Growth and Yield of Maize Under Mulched Drip Irrigation
In order to investigate the effects of water and air interaction on physiological growth and yield of maize under mulched drip irrigation and to explore the suitable water and air combination mode of maize under mulched drip irrigation,a field experiment was conducted with'Xinyu 66'as material.4 irrigation levels including 3 375(W1),4 500(W2),5 625(W3),6 750 m3∙hm-2(W4)and 2 irrigation methods including aerated drip irrigation(A)and non-aerated drip irrigation(C)were set up,and the changes of physiological growth and yield of drip irrigation maize under different water and air interaction treatments were analyzed.The results showed that with the increase of irrigation amount,the net photosynthetic rate,stomatal conductance,transpiration rate,aboveground dry matter mass and yield of maize increased first and then decreased,the intercellular CO2 concentration and irrigation water use efficiency decreased,and the yield was the highest under W3 level.The aerated drip irrigation increased the plant height,stem diameter and leaf area index of maize compared with the non-aerated drip irrigation.Under aerated drip irrigation,the net photosynthetic rate was significantly increased by 5.39%～10.09%(P<0.05),stomatal conductance was significantly increased by 10.64%～18.40%(P<0.05),transpiration rate was significantly increased by 7.07%～15.27%(P<0.05),dry matter weight was significantly increased by 5.53%～7.76%(P<0.05),with the highest growth rate under W3 irrigation.Aerated drip irrigation increased maize yield and irrigation water use efficiency by 3.58%～6.64%and 3.36%～6.63%on average,and the effect was more significant under W3 irrigation level(P<0.05).The maximum yield of AW3 treatment was 14 629 kg∙hm-2.Above results showed that AW3 treatment could promote the growth of maize and increase the yield when the irrigation amount was 5 625 m3∙hm-2 under aerated drip irrigation.Above results provided theoretical basis and technical guidance for maize production in arid oasis of Xinjiang.
国家科技期刊平台
NSTL
万方数据
