摘要
在野外调查和室内分析的基础上,探讨了0、10、22、26和30a时间序列柠条林地土壤物理、化学及酶活性的动态变化。结果表明:柠条林可提高土壤粘粒、粉粒含量,10-26a土壤容重显著降低;除全磷表现为减少趋势外,随生长年限延长,柠条林地有机质、全氮、硝态氮、铵态氮、速效磷和速效钾含量均呈现增加趋势;土壤蔗糖酶、碱性磷酸酶、脲酶和过氧化氢酶活性随柠条生长年限增加呈增加趋势,但各种酶表现最佳状态的时间不同,且蔗糖酶和碱性磷酸酶对柠条林地土壤变化的敏感性高于脲酶和过氧化氢酶。
Based on a field investigation and an indoor analysis, physical characters, nutrition and enzyme activity of soils collected from a loess hilly area were studied in the presence of 0,10,22,26 and 30 years Caragana korshinskii, in order to assess effects of soil quality by an age sequence of 0-30 years C. The results showed that the shrub ( C. korshinskii) could improve contents of both soil clay and soil silt, and lower bulk density by the grown plant with 10 to 26 years. It could also increase contents of soil organic matter, total nitrogen, nitrate, ammonium, rapidly available phosphorus and potassium, improve soil enzyme activity as years. However, optimal condition for soil enzymes activity was discovered at different periods, h was also found that sucrase and alkaline phosphate activities were more sensitive than either catalase or urease.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2007年第B03期136-140,共5页
Journal of Agro-Environment Science
基金
国家自然科学基金(40371076)
西北农林科技大学科研创新团队
研究骨干支持和研究生教育创新科研资助项目
关键词
柠条
土壤物理性质
土壤养分
土壤酶活性
caragana korshinskii
physical characters
soil nutrition
soil enzyme activity