干旱区不同灌溉量下棉田土壤碱解氮剖面分布  

Sectional Distribution of Alkaline-hydroluzale Nitrogen of Cotton Field Soil under Different Irrigation Water Supply in Arid Area

作　　者：朱靖蓉[1] 杨涛[2] 王斌[2] 陈宝燕[3] 牛新湘[2] 许咏梅[2] 刘骅[2] 马兴旺[2] 

机构地区：[1]新疆农业科学院中心实验室,乌鲁木齐830091 [2]新疆农业科学院土壤肥料与农业节水研究所,乌鲁木齐830091 [3]新疆农业大学草业与环境科学学院,乌鲁木齐830052

出　　处：《新疆农业科学》2011年第4期696-701,共6页Xinjiang Agricultural Sciences

基　　金：新疆重大专项课题(200731133-2);公益性行业(农业)科研专项(20100314)

摘　　要：【目的】明确水分如何影响肥料效应的发挥对于制定强调恰当的水肥调控技术非常重要。【方法】在新疆阿瓦提县进行田间试验,研究地面灌溉不同灌溉量下棉田土壤剖面上碱解氮时空分布特点。【结果】地面灌溉明显的影响100 cm深度土壤碱解氮含量变化,尤其0～40 cm土壤碱解氮含量变幅很大;基本上是灌水量越大,碱解氮被淋溶到下层的量就越大。【结论】"以水促肥"效应的一部分原因是灌水扩大肥料在土壤垂直方向分布范围,使更多的棉花根系可以吸收养分。【Objective】To reveal how water affects fertilizer is important to make decision to regulate and control water and fertilizer use.【Method】The paper discribed temporal-spatial character of soil N extracted by alkaline affected by different irrigation water usage in Awati County,Xinjiang.【Result】Irrigation resulted in change of soil N content in depth from 0 cm to 100 cm obviously,especially from 0 cm to 40 cm;generally the more water irrigated,the more nitrogen dissolved and moved down.【Conclusion】One reason that water promoted fertilizer use efficiency was to enlarge distribution area of nitrogen in soil profile,then more cotton roots could adsorb nutrients.

关 键 词：棉花 干旱区 灌溉 碱解氮 时空分布 

分 类 号：S152.4[农业科学—土壤学]