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以夏玉米 (ZeamaysL .) (陕单 9号 )为供试材料 ,采用置于遮雨棚下的模拟土柱的方法 ,进行了不同灌溉施肥深度对夏玉米生长发育、地上与地下部分同化物分配、产量及水分利用效率的影响的试验研究。灌溉施肥深度分 4个处理 :表面灌施 ;2 0cm深度灌水施肥 ;30cm深度灌水施肥和 40cm深度灌水施肥。后 3个处理为土表下灌施处理。 4个重复。试验结果表明 :土表下灌施抑制了玉米生育早期的地上部分生长 ,使根系向土壤中下层的分布加强 ,从而保证了作物中后期对水分养分的吸收利用 ,提高了水分利用效率。在本试验条件下 ,玉米生长的最佳灌施深度为 30cm。
Using summer maize (Zea mays L.) (Shandan 9) as test material, simulated soil columns placed under canopy were used to study the effects of different irrigation rates on the growth and development of summer maize and the assimilation of aboveground and underground parts , Yield and water use efficiency of the experimental study. The depth of irrigation and fertilization is divided into four treatments: surface irrigation; 20 cm depth irrigation and fertilization; 30 cm depth irrigation and 40 cm depth irrigation and fertilization. After the three treatments were soil surface irrigation treatment. 4 repetitions. The results showed that soil subsurface irrigation inhibited the growth of above-ground part of maize in early growth stage and strengthened the distribution of root system to the middle and lower layers of soil, thus assuring the absorption and utilization of water and nutrients and improving the water use efficiency. Under the experimental conditions, the optimal depth of maize growth is 30 cm.