调亏灌溉对绿洲麦田氮磷生态化学计量比的影响  

Effect of Regulated Deficit Irrigation on N∶P Ratio of Ecological Stoichiometry in Oasis Wheat Field

作　　者：郭松年[1] 张恒嘉[1] 

机构地区：[1]甘肃农业大学工学院水利系,兰州730070

出　　处：《灌溉排水学报》2009年第4期111-113,共3页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(40801044);甘肃省高等学校研究生导师科研计划项目(0602-05);临泽县玉米制种标准化示范及产业开发项目

摘　　要：小麦收获时调亏灌溉处理及对照0～20，20-40及O～40cm土层N：P比2008年均显著高于2007年，说明调亏灌溉能显著提高土壤N：P比，改变土壤N、P平衡。方差分析表明，0～20cm土层所有处理及对照间二个年度N：P比均无显著差异，20-40cm则差异显著，0～40cm土层2007年所有处理及对照间N：P比无显著差异，而2008年则差异显著。In this paper the N ： P ratio of ecological stoiehiometry and balance of soil total nitrogen and available phosphorus at harvest in oasis wheat field under regulated deficit irrigation were analyzed. The result indicated that the N ： P ratios in all the treatments and check in 0-20, 20-40, and 0-40 cm soil layers at wheat harvest were significantly higher in 2008 than in 2007, revealing that regulated deficit irrigation could significantly improve the soil N ： P ratio and change the balance of nitrogen and phosphorus. The ANOVA suggested that no significant differences were found in N ： P ratios in all the treatments and check at harvest in both years in 0-20 cm soil layer, while significances were found in 20-40 cm layer. Additionally, no significant differences occurred in N ： P ratios at harvest in 2007 in 0-40 cm layer, but significances did occur in 2008.

关 键 词：N:P生态化学计量比 氮磷平衡 调亏灌溉 绿洲麦田 

分 类 号：S512.1[农业科学—作物学]