不同水肥处理对毛乌素沙地玉米根系土壤养分含量的影响  

Effects of different water and fertilizer treatments on soil nutrient content in the Maowusu sandy land

作　　者：彭龙[1] 郭克贞[2] 吕志远[1] 苏佩凤[2] 任杰[2] 

机构地区：[1]内蒙古农业大学,内蒙古呼和浩特010020 [2]水利部牧区水利科学研究所,内蒙古呼和浩特010010

出　　处：《北方农业学报》2018年第1期90-98,共9页Journal of Northern Agriculture

基　　金：内蒙古科技创新引导奖励资金计划项目(20140713)

摘　　要：以毛乌素沙地干旱半干旱区为背景,研究分析了不同水肥处理下玉米根系土壤养分含量的变化,通过对玉米主要根系0~60 cm土层进行取土检测,得出满足当地玉米生长的适宜施肥指标;分析了玉米在拔节至成熟阶段各生育期末0~60 cm土层中全氮、速效钾、有机质含量的分布变化,得出拔节期受旱和抽雄期受旱处理对玉米吸收养分影响较大,表现为与充分灌溉处理相比,土壤养分含量在不同程度上有所增加;从收获后土壤中的各养分含量与播前相比,得出中肥试验方案(N为240 kg/hm^2,K_2O为60 kg/hm^2)可以满足当地玉米正常生长对养分的需求。Abstract:Taking Maowusu sandy land as the background, the change of soil nutrient content of the corn root system were analyzed under different water and fertilizer treatments.Through 0 ~60 cm corn soil layer tests,it is concluded suitable fertilization indicators that meet local maize growth demand;the distribution changes of total nitrogen, available potassium,organic matter content of the corn final 0~60 cm soil layer were analyzed in jointing stage to the mature stage; drought in jointing stage and tasseling stage had a greater influence on the processing of corn absorbing nutrients;compared with full irrigation treatment, soil nutrient content increased in different degree; From all the nutrient content of the soil after harvest compared with before planting, it is concluded that the fertilizer experiment scheme(N is 240 kg/hm^2,K2 O is 60 kg/hm^2)can meet the needs of local maize normal growth of nutrients.

关 键 词：毛乌素沙地 玉米 土壤养分 

分 类 号：S513[农业科学—作物学]