灌水对不同小麦品种产量和水分利用效率的影响

利用6个当地主推小麦品种在节水灌溉条件下的表现,研究豫北地区小麦节水高效栽培技术,筛选节水条件下的高产品种.结果表明:最佳节水灌溉模式为底墒水+拔节水+开花水.在不同灌溉模式下品种的产量潜力有差别,在只灌底墒水模式下,可选种周麦22,产量达7351.65kg/hm2;在底墒水+拔节水模式下,选种周麦22,其次是洛麦22...

Effects of Different Irrigation Patterns on Yield and Water Use Efficiency of Different Wheat Cultivars

Six main wheat varieties locally promoted were studied to explore the water saving cultivation of wheat in northern Henan and to select the outstanding varieties according to their yields under water saving irrigation.The results indicated that the optimal irrigation regime was irrigation at pre-sowing,jointing and flowering stages.The yields of varieties differed betweenirrigation patterns.In the pre-sowing water pattern(A),the optimum variety was Zhoumai 22,with the yield of 7351.65kg/ha.In the pre-sowing water and jointing water pattern(B),the optimum variety was Zhoumai 22,followed by Luomai 22 and Aikang 58.Their yields were 7720.95kg/ha and 7677.30kg/ha and 7664.55kg/ha,respectively.In the pre-sowing water,jointing water and flowering water pattern(C),the yields of Luomai 22,Zhoumai 22 and Aikang 58 were 8190.15kg/ha,7984.95kg/ha and 7910.70kg/ha,respectively.The pattern C generated the highest yield and efficiency of using irrigation water,precipitation water and soil water.The ave-rage index values of three varieties were increased by 4.4% and 17.0%,24.8% and 51.5%,4.5% and 16.8%,75.1% and 150.9%,compared to the patterns B and A.The greatest irrigation water use efficiency was found in the pattern A,and the average values of three varieties was 161.2% and 262.3% higher than the patterns B and C,which showed that with the increasing of irrigation quantity,the irrigation water use efficiency was decreased.