水分胁迫条件下不同氮磷组合对小麦产量的影响

Effect of different level of N and P on the yield of winter wheat under water stress

研究了在水分胁迫的条件下不同氮、磷组合对小麦生长发育的影响。结果表明 ,在 10 .8%～ 14 .4 %水分含量范围内 ,不同施肥处理的株高、小麦茎分蘖数、叶面积指数、成穗率以及小麦的子粒产量与生物产量均随水分含量的增加而增加。当水分含量为 10 .8%和 12 .5 %时 ,N1P1生物产量与子粒产量表现最高 ;水分含量为 14 .4 %时 ,N1P2处理的生物产与子粒产量最高。在所有施肥处理中 ,高氮高磷的处理均未表现出生物学效应的优势 ;低氮低磷组合和低氮高磷组合有利于小麦产量和其他产量因素的提高 ,在一定程度上提高了小麦的抗旱性。

The effect of different N and P levels on yield under water stress were studied. The result showed that the height, number of tillering, index of leaves and spike rate of wheat, biomass and economic yield of winter wheat were increased with increasing moisture content. The yield and factors of yield components of wheat in N1P1treatment was the highest under the content of water 10.8% and 12.5% and the yield of winter wheat with N1P2 treatment was the highest under the 14.4% water content. Among different NP treatments, the yield of winter wheat with N2P2 treatment did not attained the highest under tested arid condition. The results also showed that the N1P1 and N1P2 treatments had good effect on drought-resistance for winter wheat under arid condition.