摘要
了解高泥沙洪水淤地治沙后土壤养分分布特征，对更好地改良风沙土和利用淤积土都是十分重要的。2005年，对内蒙古鄂尔多斯公乌素引洪灌区风沙地（对照）、新淤地、淤后耕地的0～100cm剖面分层取样，进行有机质、全量氮磷钾、有效氮磷钾的测定，以明确高泥沙洪水淤地治沙后土壤养分的分布特征。结果表明，从养分的水平分布来看，淤积上部养分含量高，改良效果好，但不同养分在淤积的上、中、下部之间的分布有一定的差别；从垂直分布看，新淤地除表层养分富集明显外，40cm土层内从质地到养分都受到了淤积作用的影响；淤后耕作土壤剖面具有明显的质地分层特征，有机质、全氮、碱解氮、速效磷、速效钾含量明显与质地层次相关。
Understanding the distribution characteristics of soil nutrients in silt land by flood with high content of sand is very important to improving blown-sand soil and utilizing alluvial soil. It sample the 0 - 100 cm section of blown- sand soil, new silt land and silted tilth in the flood irrigation area of Gongwusu, Erdos, Inner Mongolia, and the organic matter, total nitrogen and phosphorus and potassium, available nitrogen and phosphorus and potassium were mensurated, in order to analyze distribution characteristic of soil nutrient after silting up using the flood with high sand in 2005. The resuits showed that as far as the horizontal distribution of nutrient is concerned, the nutrient content was high in upper reaches of silted soil, and had good improved effect, but nutrients distribution is different among the upper, the middle and the lower reaches of an irrigated area. As far as the vertical distribution is concerned, other than the nutrient content was rich in topsoil of new silt land,the deeper soil（40 cm）were all influenced by silt. The texture layered characteristics of silted tilth was significant, and the content of organic matter, total nitrogen, alkali-hydrolysis nitrogen, rapidly available phosphor, rapidly available potassium were related to soil texture layered.
出处
《华北农学报》
CSCD
北大核心
2007年第5期134-137,共4页
Acta Agriculturae Boreali-Sinica
基金
国家自然科学基金项目(50469001)
内蒙古自然科学基金重点项目(200408020601)
教育部春晖计划项目(22004-5-1501)
关键词
风沙地
洪水
养分
分布
Blown-sand soil
Flood
Nutrient
Distribution
