冻融期可溶性植物养分的运移规律研究  

Transport Rules of Soluble Plant-nutrition Elements During Freezing and Thawing Period

作　　者：宋迪[1] 陈晓飞[1] 张磊[1] 刘畅[1] 张鸿亮[1] 胡宇祥[1] 李彩霞[2] 

机构地区：[1]沈阳农业大学水利学院,沈阳110161 [2]中国农业科学院农田灌溉研究所,河南新乡453003

出　　处：《灌溉排水学报》2009年第3期89-92,共4页Journal of Irrigation and Drainage

基　　金：国家自然科学基金资助项目(40272102)

摘　　要：通过现场试验与室内测定分析,对可溶性植物营养成分SO42-、NO3-、Ca2+及K+在冻结融化过程中的运移过程进行了研究。结果表明,冻结初期土壤中含有离子浓度越大,融化末期其降低幅度也越大。同时高浓度陪补离子NO3-和Ca2+促使SO42-淋失,高浓度陪补离子SO42-促进土壤Ca2+的吸附使Ca2+增加。而Ca2+的存在并未使土壤的固钾能力因冻结初期K+浓度的增加而增强。Today, with continuously increasing of using fertilizer, study on transport rules of plant-nutrition elements in tilled soil during freezing and thawing period is more and more important, whether in frozen soil field or in water and soil environmental protection and the controlling aspect of soil secondary salinization. The author developed field test and the indoor determination for this point. It reveals the transport rules of SO4^2- .NO3^-.Ca^2＋ and K^＋ during freezing and thawing period. The results show that the higher ion concentration during freezing initial period, the higher lowered range of it during melting end period. And high-concentration of simultaneous existence NO3^- and Ca^2＋ , makes concentration of SO4^2- lower. High-concentration of simultaneous existence SO4^2- , promotes concentration of Ca^2＋ to increase. The existence of Ca^2＋ couldn＇t increase the K fixation capacity, even though concentration of K^＋ is big during freezing initial period.

关 键 词：冻融过程 可溶性植物养分 运移规律 

分 类 号：S158.3[农业科学—土壤学]