Dynamic changes in soil chemical properties and microbial community structure in response to different nitrogen fertilizers in an acidified celery soil  

作　　者：Yuping Wu Jiangxing Wu Yongjun Ma Ying Lian Hui Sun Danchao Xie Yaying Li Philip C.Brookes Huaiying Yao 

机构地区：[1]Key Laboratory of Urban Environment and Health,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China [2]Ningbo Agriculture Bureau,Ningbo 315012,China [3]Ningbo Institute of Standardization,Ningbo 315040,China [4]Ningbo Urban Environment Observation and Research Station,Chinese Academic Sciences,Ningbo 315830,China [5]College of Environmental and Natural Resource Sciences,Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition,Zhejiang University,Hangzhou 310058,China

出　　处：《Soil Ecology Letters》2019年第3期105-113,共9页土壤生态学快报（英文）

基　　金：financially supported by the Ningbo Agricultural Science and Education Project(2013NK29);the National Natural Science Foundation of China(41301251).

摘　　要：To determine the effects of different kinds of nitrogen fertilizer,especially high-efficiency slowrelease fertilizers,on soil pH,nitrogen(N)and microbial community structures in an acidic celery soil,four treatments(CK,no N fertilizer;NR,urea;PE,calcium cyanamide fertilizer;and SK,controlled-release N fertilizer)were applied,and soil pH,total soil N,inorganic N,and soil microbial biomass C were analyzed.Phospholipid fatty acids(PLFAs)were extracted and detected using the MIDI Sherlock microbial identification system.The PE treatment significantly improved soil pH,from 4.80 to>6.00,during the whole growth period of the celery,and resulted in the highest celery yield among the four treatments.After 14 d application of calcium cyanamide,the soil nitrate content significantly decreased,but the ammonium content significantly increased.The PE treatment also significantly increased soil microbial biomass C during the whole celery growth period.Canonical variate analysis of the PLFA data indicated that the soil microbial community structure in the CK treatment was significantly different from those in the N applied treatments after 49 d fertilization.However,there was a significant difference(P<0.05)in soil microbial community structure between the PE treatment and the other three treatments at the end of the experiment.Calcium cyanamide is a good choice for farmers to use on acidic celery land because it supplies sufficient N,and increases soil pH,microbial biomass and the yield of celery.

关 键 词：Acidified Calcium cyanamide CELERY Phospholipid fatty acid Soil nitrogen 

分 类 号：S15[农业科学—土壤学]