| 华北山前平原农田土壤养分循环的酶学调控 |
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| 引用本文： | 秦树平,胡春胜,张玉铭,王玉英,董文旭,李晓欣.华北山前平原农田土壤养分循环的酶学调控[J].中国生态农业学报,2011,19(5):1129-1133. |
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| 作者姓名： | 秦树平 胡春胜 张玉铭 王玉英 董文旭 李晓欣 |
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| 作者单位： | 1. 中国科学院遗传与发育生物学研究所农业资源研究中心 石家庄 050022;中国科学院研究生院 北京 100049
2. 中国科学院遗传与发育生物学研究所农业资源研究中心 石家庄 050022 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目(KZXX2-YW-Q02-02)、中国科学院战略性先导科技专项(XDA0505050202)和中国科学院知识创新工程重要方向项目(KZCX2-YW-Q1-07)资助 |
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| 摘 要： | 土壤酶是推动土壤养分循环的生物催化剂, 研究华北山前平原农田养分循环的酶学调控机制将有助于评价该地区土壤养分状况。试验用土壤取自中国科学院栾城农业生态系统试验站, 分析了土壤脲酶与碱性磷酸酶活性在0~10 cm、10~20 cm、20~30 cm 和30~40 cm 4 个土层中的分布, 研究了土壤粗砂(2 000~200 μm)、粉砂(200~63 μm)、粉粒(63~2 μm)和黏粒(2~0.1 μm) 4 个颗粒组中土壤酶活性与土壤养分之间的相关性。研究结果表明: 土壤脲酶活性与碱性磷酸酶活性均随土壤深度增加而降低, 土壤酶活性随土壤粒径减小而升高。在土壤粗砂和粉砂组分中, 土壤酶活性与养分含量显著相关, 而在土壤粉粒和黏粒组分中, 土壤酶活性与土壤养分含量并不总是显著相关。这些结果说明: 土壤酶活性在土壤养分循环中起到重要的调控作用, 土壤粗砂和粉砂中的土壤酶具有较高的田间实际催化活性, 对土壤养分循环的贡献较大; 与此相反, 土壤粉粒和黏粒中的土壤酶由于土壤无机矿物的吸附作用而失去部分田间催化能力, 降低了其对土壤养分循环的贡献。
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| 关 键 词： | 土壤酶 脲酶 磷酸酶 土壤养分循环 速效磷 华北平原 |
| 收稿时间： | 2011/4/15 0:00:00 |
| 修稿时间： | 6/3/2011 12:00:00 AM |
Enzymological regulation of soil nutrient cycle in the piedmont region of North China Plain |
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| QIN Shu-Ping,HU Chun-Sheng,ZHANG Yu-Ming,WANG Yu-Ying,DONG Wen-Xu and LI Xiao-Xin.Enzymological regulation of soil nutrient cycle in the piedmont region of North China Plain[J].Chinese Journal of Eco-Agriculture,2011,19(5):1129-1133. |
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| Authors: | QIN Shu-Ping HU Chun-Sheng ZHANG Yu-Ming WANG Yu-Ying DONG Wen-Xu and LI Xiao-Xin |
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| Institution: | Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China;Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China |
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| Abstract: | Soil enzymes are the biochemical catalysts of soil nutrient cycle.Research efforts on enzymological mechanisms of soil nutrient cycle are vital in evaluating the state of soil nutrients in the piedmont region of North China Plain(NCP).The objectives of the study were to investigate: i) the distributions of soil enzyme activity in the soil profile and ii) the correlations between soil en-zyme activity and nutrient content of different particle-size fractions.The soils were collected from long-term field expe... |
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| Keywords: | Soil enzyme Urease Phosphatase Soil nutrient cycle Available phosphorus North China Plain |
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