Position: Home > Articles > Effects of Freeze- thaw Cycles on Phosphorus Adsorption and Desorption Charaterstics in Brown Earth
Journal of Shenyang Agricultural University
2014,45
(3)
359-362
冻融循环对水土混合样磷吸附-解析特性的影响
作 者：
周丽丽;姜克文;郭成久
单 位：
沈阳农业大学水利学院
关键词：
吸附解析;冻融循环;外源磷;棕壤
摘 要：
为了探讨冻融环境下水土混合样磷的吸附-解析特性,人工模拟冻融环境,以棕壤土样与溶液混合后进行冻融循环试验,探讨冻融循环次数和外源磷含量对磷吸附解析机制的影响。结果表明:经过冻融循环的土样有更强的缓冲能力;外源磷含量越高其吸附量越大,随着冻融循环次数增多吸附量减少、吸附速率降低;不同外源磷含量土样均在未冻融时吸附量最大,1次冻融后吸附量减少最多;第3次冻融时吸附量再次增加;6次冻融循环后,不同外源磷含量土样的P吸附量均趋于动态平衡。外源磷含量对棕壤磷吸附的影响相对较大。解析量随着解析次数的增加而减少,最终趋于稳定,且经过冻融的水土混合样比单一土样的P吸附量、解析量大。
译 名：
Effects of Freeze- thaw Cycles on Phosphorus Adsorption and Desorption Charaterstics in Brown Earth
作 者：
ZHOU Li-li;JIANG Ke-wen;GUO Cheng-jiu;College of Water Conservancy,Shenyang Agricultural Univerticy;
关键词：
adsorption parsing;;the freeze-thaw cycle;;exogenous phosphorus;;brown earth
摘 要：
This experiment mainly discusses freeze-thaw environment soil adsorption of phosphorus compound sample- analytical characteristics. The experiment of artificial simulation of freezing and thawing environment to brown soil as the research object, the freeze-thaw cycle effect was discussed on phosphorus adsorption and preservation mechanisms. Phosphorus contents in different soil samples are not same when freezing and thawing adsorption quantity, adsorption amount after 1 time of freezing and thawing decreases most.The thired times of freezing and thawing, phosphorus adsorption quantity increased again; After the sixth times freeze-thaw cycles, the different concentrations of soil phosphorus adsorption quantity in dynamic balance. Parsing the amount as the increase and decrease the number of parsing was finally stabilized.
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