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当前位置: 首页 > 文章 > 亚热带毛竹林土壤磷组分和微生物对施氮的响应 应用生态学报 2020 (3) 753-760
Position: Home > Articles > Responses of soil phosphorus fractions and microorganisms to nitrogen application in a subtropical Phyllostachys pubescen forest Chinese Journal of Applied Ecology 2020 (3) 753-760

亚热带毛竹林土壤磷组分和微生物对施氮的响应

作  者：
曾泉鑫;曾晓敏;林开淼;张秋芳;程蕾;周嘉聪;林巧玉;陈岳民;徐建国
单  位：
湿润亚热带山地生态国家重点实验室培训基地;福建戴云山国家级自然保护区管理局;福建师范大学地理科学学院
关键词：
施氮;磷组分;微生物生物量;磷酸酶活性
摘  要：
磷(P)是植物和微生物生长的重要营养元素,亚热带地区土壤P有效性较低,且长期高氮(N)沉降可能会造成土壤P有效性进一步降低。本试验开展于戴云山毛竹林,分析了施N 3年对土壤的基本理化性质、P组分、微生物生物量和酸性磷酸单酯酶活性的影响。结果表明:施N显著增加了土壤NO_3~--N含量,提高了土壤N有效性,但显著降低了易分解态有机磷占全磷的比例,且总有机碳与总有机P的比例>200。土壤微生物生物量碳、微生物生物量磷、酸性磷酸单酯酶活性、微生物生物量碳/微生物生物量磷和微生物生物量氮/微生物生物量磷随施N量的增加而增加。此外,易分解态有机磷占总磷比例与微生物生物量磷呈显著负相关关系。因此,施N加剧了土壤P有效性限制,提高了微生物对P的需求。
译  名：
Responses of soil phosphorus fractions and microorganisms to nitrogen application in a subtropical Phyllostachys pubescen forest
作  者：
ZENG Quan-xin;ZENG Xiao-min;LIN Kai-miao;ZHANG Qiu-fang;CHENG Lei;ZHOU Jia-cong;LIN Qiao-yu;CHEN Yueh-min;XU Jian-guo;School of Geographical Science, Fujian Normal University;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology;Daiyun Mountain National Nature Reserve Administration Bureau;
关键词：
nitrogen application;;phosphorus component;;microbial biomass;;phosphomonoesterase activity
摘  要：
Phosphorus(P) is an important nutrient for plant and microbial growth. Soil P availabi-lity is poor in subtropical areas. Long-term heavy nitrogen(N) deposition might further reduce P availability. The experiment was performed in a Phyllostachys pubescens forest in Daiyun Mountain. The effects of N application on soil basic physical and chemical properties, soil P fractions, microbial biomass, and acid phosphomonoesterase activity were analyzed after three years of N application. The results showed that N application significantly increased NO_3~--N content and thus soil N availability, while it significantly reduced the percentage of decomposable organic P to total P, with the ratio of carbon(C) to organic P being over 200. The soil microbial biomass C, microbial biomass P, acid phosphomonoesterase, and the ratio of microbial biomass N to microbial biomass P and microbial biomass C to microbial biomass P were increased as the N application rate increased. There was a significant negative correlation between the percentage of decomposable organic P to total P and microbial biomass P. Consequently, N application enhanced soil P limitation and increased microbial P demand.

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