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当前位置: 首页 > 文章 > 施肥制度与养分循环对稻田土壤微生物生物量碳氮磷的影响 农业环境科学学报 2005,24 (06) 1094-1099
Position: Home > Articles > Effects of Fertilization Systems and Nutrient Recycling on Microbial Biomass C,N and P in a Reddish Paddy Soil Journal of Agro-Environment Science 2005,24 (06) 1094-1099

施肥制度与养分循环对稻田土壤微生物生物量碳氮磷的影响

作  者：
陈安磊;王凯荣;谢小立
单  位：
中国科学院亚热带农业生态研究所
关键词：
施肥制度;养分循环;红壤性水稻土;微生物生物量C;微生物生物量N;微生物生物量P
摘  要：
以红壤性稻田土壤为对象,采用田间试验方法,研究了在不同化肥配施条件下,有机养分循环利用对土壤微生物量C(MB-C)、N(MB-N)、P(MB-P)的影响。结果表明:①稻田土壤能维持较高的土壤微生物生物量。②化肥N、P、K先后引入农田生态系统对土壤MB-C、MB-N、MB-P没有显著的影响;有机养分循环利用能显著提高土壤MB-C;在施化肥NP或NPK基础上实行有机养分循环利用能显著提高土壤MB-N和MB-P,而在不施化肥或只施化肥N的基础上,有机养分循环利用虽也能提高土壤MB-N和MB-P含量,但提高的幅度没有达到统计学显著水平。随着NPK肥配合程度的提高,有机养分循环利用土壤MB-C、MB-N、MB-P的提高幅度有上升的趋势。③土壤MB-C与有机C的年际投入量有极显著的正相关关系,另外土壤微生物生物量C、N、P分别与土壤有机C、土壤全N、速效P有显著的正相关关系。通过有机养分循环利用可大幅度提高微生物对N素和P素的固持量,提高土壤MB-C、MB-N、MB-P占土壤全量C、N、P的比例。
译  名：
Effects of Fertilization Systems and Nutrient Recycling on Microbial Biomass C,N and P in a Reddish Paddy Soil
作  者：
CHEN An-lei1,2,WANG Kai-rong1,XIE Xiao-li1(1.Institute of Subtropical Agriculture,the Chinese Academy of Sciences,Changsha 410125,China;2.Graduate School of the Chinese Academy of Sciences,Beijing 100039,China)
关键词：
fertilization systems;reddish paddy soil;organic nutrient recycling;MB-C;MB-N;MB-P
摘  要：
Based on a 14-year long term experiment,the effects of fertilization systems and nutrient recycling on microbial biomass C,N and P in a reddish paddy soil were studied.The main results were as followings:⑴ The paddy soil has a strong ability on maintaining a high level of microbial biomass.⑵ The amounts of microbial biomass C,N and P in the soil were not significantly affected by application of fertilizer N,NP or NPK,while the amount of MB-C was significantly increased by organic nutrient recycling use in the rice ecosystem.Under application of fertilizer NP or NPK,the amount of microbial biomass N and P were significantly improved with the recycling of organic nutrient.However,microbial biomass N and P were not significantly increased by the recycling use of organic nutrient based on zero fertilizer or application of fertilizer N alone.With increasing the combinative degree of fertilizer N,P and K application,the recycling use of organic nutrient had more benefit in increasing microbial biomass C,N and P in the soil.⑶ There was a very strong relationship between the amount of organic carbon input and the concentration of soil MB-C.Moreover,the microbial biomass C,N and P had a significant relationship with soil total C and N,and available P,respectively.Therefore,the recycling use of organic nutrient improved the rate of soil MB-C to soil total C,MB-N to total N and MB-P to total P,and also enhanced the fixation of microbial to N and P nutrients.

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