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对渭北旱塬地膜小麦的品种、播期、密度和施肥方式进行了研究。结果表明 ,旱地地膜小麦应选用耐寒耐旱、分蘖力强、大穗大粒、冬性或半冬性的中矮秆或矮秆品种 ;播期应该与露地同期或稍偏晚 ,最佳播期为0 9- 2 5～ 0 9- 2 7;播量以 2 4 0～ 2 5 5万粒 / hm2最佳 ;等量的氮肥分施与否不影响产量。全生育期的耗水量为 370 .7～391.3m m,水分利用效率达 10 .35～ 13.6 3kg/ (m m· hm2 ) ,均高于露地条播 ,不同处理间的日均耗水量差异很小 ,但水分利用效率差异较大 ,水分利用效率最大时的农艺措施 ,所获得的产量也最高
The variety, sowing date, density and fertilization mode of plastic film wheat in Weibei arid highland were studied. The results showed that dry land mulched wheat should be medium-dwarf or dwarf with cold-tolerant and drought-tolerant, strong tillering ability, big spike and large grain, winter or semi-winter. Sowing date should be the same as or slightly later than open field, 0 9-2 25-0 9-2 7; sowing rate was 240-25500 / hm2; the same amount of nitrogen fertilization did not affect the yield. The water consumption during the whole growth period was 370.7 ~ 391.3mm, and the water use efficiency was 10.35 ~ 13.6 3kg / (mm · hm2), which was higher than that of open field. The average daily water consumption of different treatments was very small, The water use efficiency is quite different, the maximum water use efficiency when the agronomic measures, the highest yield