水分调控对冬小麦同化物分配与水分利用效率的影响研究

Effect of water control in combination of depth and amount on dry matter partition and water use efficiency of winter wheat

摘要: 试验研究12个灌溉组合方式对冬小麦干物质积累与分配、产量和水分利用效率的影响结果表明，地面灌水条件下不同处理的地上部干物质积累量由高至低依次为田间持水量65％的处理>50％的处理>80％的处理；地下30cm、50cm 和100cm 灌水条件下田问持水量80％的处理>65％的处理>50％的处理。产量以地下30cm 灌水×80％田问持水量处理最高，为6512．4kg／hm²，地下50cm 灌水×50％田间持水量处理产量最低，为3568．1kg／hm²

Abstract: A three years field tria1．under the water control experim ent with different soll depths and water contents，is cartled out to study the effects of water control on dry matter distribution， yield and water use efficiencies of winter wheat．The resUIts show that the dry matter accum ulation above the ground is 65％ FC> 50％ FC> 80％ FC in the treatment of surface irrigation and 80％ FC>65％ FC>50％FC in other three treatments of under surface irigation；the treatment of 30cm×80％ FC produces the highest yield of 6512．4kg／hm², the lowest yield of 3568．1 kg／hm² appears in the treatment of 50cm ×50％ FC．The crop water use efficiency gradually increases with the depths increasing．The optimum combinations would be 30cm × 80％ FC and 30cm × 65％ FC．