不同淋溶过程下土壤酶活性变化特征研究
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摘要
为了研究不同降雨淋溶过程中土壤酶活性变化趋势,利用模拟土柱装置,设计了300、600、900和1200mm的模拟雨量水平,共进行12次淋溶实验,分析淋溶后土柱内土壤酶活性。结果表明:淋溶作用与土壤脲酶、酸性磷酸酶和蔗糖酶之间存在极显著负相关关系(P<0.01),随着设计淋溶水量的增加,三者活性均表现降低趋势。但是增加淋溶水量时,脲酶和蔗糖酶的活性变化减小,酸性磷酸酶受影响仍非常明显,各组内均有显著性差异(P<0.05)。实验中土壤过氧化氢酶的活性没有受到淋溶作用影响,在各处理组间基本没有变化。
In order to study the trend of soil enzyme activities during different rainfall leaching processes,a soil column device was used to simulate leaching experiments with rainfall of 300,600,900 and 1200 mm. A total of 12 leaching experiments were carried out to analyze the soil enzyme activities in the soil column after leaching. The results showed that:There was a significant negative correlation between the activities of soil urease,acid phosphatase and invertase in leaching(P<0.01). As the amount of leaching water increases,the activities of these three decreases. However,when the amount of leaching water was increased,the changes of soil urease and invertase activities were gradually reduced,but the effect to soil acid phosphatase was still very obvious. There were significant differences among the groups in acid phosphatase(P<0.05). The soil catalase activity in the experiment was not affected by leaching,and the enzyme activities of each group were basically unchanged.
In order to study the trend of soil enzyme activities during different rainfall leaching processes,a soil column device was used to simulate leaching experiments with rainfall of 300,600,900 and 1200 mm. A total of 12 leaching experiments were carried out to analyze the soil enzyme activities in the soil column after leaching. The results showed that:There was a significant negative correlation between the activities of soil urease,acid phosphatase and invertase in leaching(P<0.01). As the amount of leaching water increases,the activities of these three decreases. However,when the amount of leaching water was increased,the changes of soil urease and invertase activities were gradually reduced,but the effect to soil acid phosphatase was still very obvious. There were significant differences among the groups in acid phosphatase(P<0.05). The soil catalase activity in the experiment was not affected by leaching,and the enzyme activities of each group were basically unchanged.
引文
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[2]Badiane N N Y,Chotte J,Pate E,et al.Use of soil enzyme activities to monitor soil quality in natural and improved fallows in semi-arid tropical regions[J].Applied Soil Ecology,2001,18(3):229-238.
[3]曹慧,孙辉,杨浩,等.土壤酶活性及其对土壤质量的指示研究进展[J].应用与环境生物学报,2003,01:105-109.
[4]鲍士旦.土壤农化分析[M].北京:中国农业出版社,2001.
[5]韩亚萍,马耀光,吉鸿敏.酸雨对黄土磷的淋溶效应[J].水土保持通报,2013,33(02):66-71.
[6]关松阴.土壤酶及其研究法[M].北京:农业出版社,1986.
[7]Baldrian P.Microbial enzyme-catalyzed processes in soils and their analysis[J].Plant Soil and Environment,2018,55(9):370-378.
[8]Kivlin S N,Treseder K K.Soil extracellular enzyme activities correspond with abiotic factors more than fungal community composition[J].Biogeochemistry,2014,117(1):23-37.
[9]Gutknecht J L M,Henry H A L,Balser T C.Inter-annual variation in soil extra-cellular enzyme activity in response to simulated global change and fire disturbance[J].Pedobiologia,2010,53(5):283-293.
[10]许华,何明珠,孙岩.干旱荒漠区土壤酶活性对降水调控的响应[J].兰州大学学报(自然科学版),2018,54(06):790-797.
[11]张静茹,张雷一,刘方,等.降雨对干旱半干旱地区土壤微生物影响研究进展[J].世界林业研究,2014,27(04):6-12.