小麦/玉米间作和氮肥对水分利用的影响

Effect of wheat/maize intercropping and nitrogen fertilizer on water use

以甘肃河西灌区为试验地点,探讨了在两个氮水平下6个小麦品种与玉米间作对水分的利用情况,结果表明：不同品种小麦与玉米间作,小麦收获后,间作小麦土壤含水量都高于单作,间作玉米土壤含水量低于单作;玉米收获后,与6个小麦品种间作的玉米土壤含水量都高于单作;但不同小麦品种在土层深度上又有差异。不施氮条件下,6个小麦品种与玉米间作相对于单作水分消耗量（WU）减少4.82%-8.79%,小麦品种171与玉米间作相对于单作水分利用效率（WUE）增加9.25%,而其余5个品种与玉米间作较单作减少2.30%-15.06%。在300kg/hm^2氮水平下,6个小麦品种与玉米间作较单作WU减少1.09%-6.96%,WUE增加10.76%-29.56%。

Effect of 6 varieties of wheat intercropped with maize at two nitrogen rate in Hexi corridor of Gansu province on water use were discussed, the results showed that soil water content of intercropped wheat were higher than that of solecropped, and soil water content of intercropped maize were lower than that of solecropped after wheat harvest, soil water content of intercropped maize were higher than that of solecropped after maize harvest, but soil depth were different with various wheat varieties. With no nitrogen application, water use （WU） by 6 varieties of wheat/maize intercrops relative to sole crops were decreased by 4.82% - 8.79%. Water use efficiency （WUE） by wheat of 171/maize intercrops relative to sole crops were increased by 9.25 %, yet the other varieties of wheat/maize intercrops relative to sole crops were decreased by 2.30 % - 15.06 %. At 300 kg/hm^2 nitrogen rate,WU by 6 varieties of wheat/maize intercrops relative to sole crops were decreased by 1.09% - 6.96%, WUE by 6 varieties of wheat/maize intercrops relative to sole crops were increased by 10.76 % - 29.56 %.