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不同土地管理方式对黑土土壤微生物量碳和酶活性的影响
引用本文:王光华,金剑,韩晓增,刘居东,刘晓冰. 不同土地管理方式对黑土土壤微生物量碳和酶活性的影响[J]. 应用生态学报, 2007, 18(6): 1275-1280
作者姓名:王光华  金剑  韩晓增  刘居东  刘晓冰
作者单位:中国科学院东北地理与农业生态研究所黑土生态重点实验室,哈尔滨,150081
基金项目:中国科学院前沿领域研究基金;国家自然科学基金
摘    要:在中国科学院海伦农业生态实验站长期定位试验区,对比研究了黑土自然恢复、休闲裸地和种植作物3种管理方式对0~10、20~30和40~50cm深度土壤的微生物量碳和脲酶、磷酸酶、过氧化氢酶和转化酶活性的影响.结果表明:0~10cm表层土壤的微生物量碳和土壤酶活性均表现为自然恢复〉种植作物〉休闲裸地处理,而20~30cm和40~50cm深度土壤的微生物量碳和土壤酶活性虽也存在差异,但不如表层土壤变化显著.自然恢复和种植作物处理的土壤微生物量碳和土壤酶活性均随土层深度增加而降低,而休闲裸地处理的土壤微生物量碳和脲酶、磷酸酶、过氧化氢酶活性却以20~30cm土层为高.相关分析表明,土壤全碳和全氮、土壤全碳和微生物量碳、土壤微生物量碳和4种土壤酶活性之间都存在极显著的正相关关系.土壤酶活性和土壤微生物量碳两项指标表明在自然恢复条件下黑土土壤质量较好.

关 键 词:PROSAIL模型  毛竹林  叶面积指数  遥感  查找表  
文章编号:1001-9332(2007)06-1275-06
修稿时间:2006-07-152007-03-21

Effects of different land management practices on black soil microbial biomass C and enzyme activities
WANG Guang-hua,JIN Jian,HAN Xiao-zeng,LIU Ju-dong,LIU Xiao-bing. Effects of different land management practices on black soil microbial biomass C and enzyme activities[J]. The journal of applied ecology, 2007, 18(6): 1275-1280
Authors:WANG Guang-hua  JIN Jian  HAN Xiao-zeng  LIU Ju-dong  LIU Xiao-bing
Affiliation:Key Laboratory of Black Soil Ecology, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Scienees, Harbin 150081, China
Abstract:In a long-term experimental plot at the Hailun Agricultural Ecology Station of Chinese Academy of Sciences in Heilongjiang Province, Northeast China, the effects of three land management practices including natural restoration, fallowing and cropping on black soil microbial biomass C and enzyme activities at the depths of 0-10, 20-30 and 40-50 cm were investigated. The results showed that at 0-10 cm, soil microbial biomass C and soil urease, phosphatase, catalase and invertase activities were in the sequence of natural restoration > cropping > fallowing, while at 20-30 cm and 40-50 cm, they had less significant differences as those at 0-10 cm. Under natural restoration and cropping, soil microbial biomass C and soil urease, phosphatase and catalase activities decreased with increasing soil depth, while under fallowing, they were higher at 20-30 cm. Correlation analysis showed that there existed significant positive correlations between soil total C and total N, soil total C and microbial biomass C, and soil microbial biomass C and test enzyme activities. The indices soil microbial biomass C and soil enzyme activities showed that black soil under long-term natural restoration had better soil quality.
Keywords:black soil   natural restoration   fallowed bare land   cropping   soil depth.
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