PAL肥料缓释剂对陇东黄土旱塬冬小麦水氮效率的影响

Effects of PAL on Water Use Efficiency and Nitrogen Utilization Efficiency of Winter Wheat in East of Gansu,Loess Plateau

为研究PAL肥料缓释剂对冬小麦产量、水分利用效率(WUE)及氮肥利用效率(NUE)的影响,于2008—2010年度在陇东黄土旱塬进行了冬小麦田间试验。结果表明,在施氮量相同的情况下,较高PAL肥料缓释剂用量增产效果显著,在施氮量0～105kg/hm2、施PAL肥料缓释剂90～150kg/hm2范围内,随施氮量和PAL肥料缓释剂用量的增加,冬小麦产量增加,产量性状优,水分利用效率高;而在同等氮用量条件下,配施PAL肥料缓释剂的氮肥利用效率均高于非配施处理;而在同等PAL肥料缓释剂用量条件下,高用氮量较低用氮量的氮肥效率高。

The effect of PAL on the yield of winter wheat, water use efficiency（WUE） and nitrogen utilization efficiency（NUE） were investigated from 2008 to 2010 in Loess Plateau East of Gansu. The results showed that the yield of winter wheat increased significantly with applying higher amount of PAL under the same amount of N, and improved winter wheat yield and water use efficiency with increasing N and PAL in the experimental design of N 0-105 kg/hme and PAL 90-150 kg/hm^2 range; NUE of applying PAL treatment were higher than that of non-PAL treatment in the same amount of N, NUE of high N application amount treatment is higher than that of low N application amount treatment at the same amount of PAL.