不同培肥茶园土壤微生物量碳氮及相关参数的变化与敏感性分析  

Sensitivity analysis and dynamics of soil microbial biomass carbon,nitrogen and related parameters in red-yellow soil of tea garden with different fertilization practices

作　　者：王利民[1] 邱珊莲[1] 林新坚[1] 黄东风[1] 李卫华[1] 邱孝煊[1] 

机构地区：[1]福建省农业科学院土壤肥料研究所,福州350013

出　　处：《生态学报》2012年第18期5930-5936,共7页Acta Ecologica Sinica

基　　金：国家科技支撑计划项目(2006BAD25B08);国家科技支撑计划项目(2012BAD14B15-6);福建省自然科学基金(2011J05057);福建省属公益类基本科研专项(2010R1024-4)

摘　　要：通过闽东地区茶园培肥长期定位试验,研究了不同培肥模式下土壤微生物量碳、氮,微生物量碳占溶解有机碳的比值和微生物熵的动态变化及其与其他土壤参数、茶叶理化性状的相关性。试验设6个处理:全量化肥(C),半量化肥+半量有机肥((CO)1/2),全量有机肥(O),全量化肥+豆科绿肥(CL),半量化肥+半量有机肥+豆科绿肥((CO)1/2L)和不施肥(CK)。研究结果显示:(CO)1/2L、CL和O等处理下土壤微生物量碳含量分别比CK增加了1.87、1.26、1.49倍,微生物量氮增加了2.18、1.32、1.70倍,而处理C的土壤微生物量碳、氮分别减少了0.46、0.59倍;微生物量碳占溶解有机碳的比值大小顺序为O>(CO)1/2L>CL>(CO)1/2>CK>C。可见,该区处理O和(CO)1/2L的培肥效果较佳。相关分析发现,微生物量碳及其占溶解有机碳的比值分别和土壤脲酶、有机质、全氮、全磷、水解氮、有效磷、速效钾、含水量、阳离子交换量等均呈显著正相关(P<0.05),表明它们与土壤肥力关系密切,可作为评价茶园土肥力变化的敏感指标。Soil microbial biomass as an important parameters can function as sensitive indicators of c active component in global carbon and nitrogen cycle, and its relative hanges in soil quality. Our objective was to investigate effects of different fertilization practices on soil microbial biomass Carbon （SMBC）, Nitrogen （SMBN）, the microbial quotient （MQ） and the ratio of SMBC to dissolved organic carbon （ DOC）, and to analyze the correlations of these biological indices with other soil parameters, the physicochemical properties in tea leaves, respectively, through the long-term fertilizer experiment of the tea garden in east Fujian （ 119 °23 ＇- 119 ° 51＇ E, 26 °41 ＇-27 ° 24＇ N ）. Six fertilization treatments were designed in this study ： chemical fertilizers （ C ）, half-organic manure plus half-chemical fertilizers （ （ CO ） 1/2 ）, organic manure fertilizers （ O ）, leguminous green manure plus chemical fertilizers （CL） , half-organic manure, leguminous green manure plus half-chemical fertilizers （（CO）1/2L）, and without fertilizers （CK）. Results indicated that in comparison with CK, SMBC concentrations in（CO）1/2L, CL and O treatments increased by 1.87, 1.26, 1.49 times, SMBN increased by 2.18, 1.32 and 1.70times, respectively, whereas SMBC and SMBN concentrations in the C treatment decreased by 46%, 59%, individually. In terms of the ratio of SMBC to DOC, different fertilization treatments followed the orders of O〉 （CO）1/2L〉CL〉（CO）1/2 〉 CK〉C. Thus the fertilizing effect on soil fertility improvement in the O and （CO）1/2L treatments was better than those in other treaments. A correlation analysis revealed that the concentration of SMBC and the ratio of SMBC to DOC were significantly and positively correlated with soil urease activity, the contents of soil organic matter, total N and P, hydrolysable N, available P and K, soil water, CEC（P〈0.05 ）, respectively, further suggesting the concentration of SMBC and the ratio of SMBC

关 键 词：培肥模式 土壤微生物生物量碳 氮 微生物熵 相关参数 敏感性分析 

分 类 号：S571.1[农业科学—茶叶生产加工]