水土保持通报2011，Vol.31Issue(5)：59-64,162,7.
不同土地利用方式下石灰土土壤团聚体与土壤酶活性的关系
Relationship Between Soil Enzyme Activity and Aggregates in Calcareous Soils Under Different Land Uses
摘要
Abstract
Four soil samples were collected from Huajiang distract to represent four different types of land management,including in forest,abandoned land,cultivated land and Zanthoxylum bungeanum forest.Soil aggregates were obtained with dry sieving method for soil enzyme activity analysis.The results show that in the forest,the large soil aggregates（5 mm） had the strongest soil enzyme activity,and the micro-aggregates（0.25 mm） had the lowest.The aggregates from the abandoned land showed an opposite trend,and the aggregates the farmland and Zanthoxylum bungeanum forest were the intermediate.The sucrose,amylase,urease,protease,and phosphatase of the aggregates of all the three sizes showed the highest activity in the forest,and the lowest in the cultivated land.The catalase activity of the aggregates from the abandoned land sample was the lowest.The amylase activity of micro-aggregates（0.25 mm） was the highest.The aggregates showed the order of decreasing amylase,protease,acid phosphatase,and catalase activities as： micro-aggergats 2~1 mm aggregateslarge aggregats.With increase of aggregate size,the enzyme activity decreased.The aggregates also showed the order of decreasing polyphenol oxidase and urease activities as： micro-aggregatslarge aggregats2~1 mm aggregates.The enzyme activity of soil micro-aggregates of was the highest.The forest had the least content of micro-aggregate.The results indicate that the soil enzyme activity in the forest was relatively low,resulting a slow release rate of available nutrients.On the contrary,the nutrients in the cultivated land were released quickly.关键词
土地利用方式/团聚体/土壤酶Key words
land management types/aggregation/soil enzyme分类
农业科技引用本文复制引用
周玮,周运超,鲁秦安..不同土地利用方式下石灰土土壤团聚体与土壤酶活性的关系[J].水土保持通报,2011,31(5):59-64,162,7.基金项目
贵州省自然科学基金项目“不同碳酸盐岩石对土壤侵蚀影响的研究” （）
