紫色土坡耕地C、P与微生物生物量C、P对不同施肥的响应

应用生态学报

紫色土坡耕地C、P与微生物生物量C、P对不同施肥的响应

高扬^1,5**,徐亚娟²,彭焱^1,3,金晶^1,4,朱波⁵,于贵瑞¹

(¹中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室, 北京 100101; ^2中南林业科技大学, 长沙 410000; ³长江工程职业技术学院, 武汉 430212; ⁴北京高能时代环境技术股份有限公司, 北京 100095; ^5中国科学院成都山地灾害与环境保护研究所, 成都 610041)

出版日期:2015-01-18 发布日期:2015-01-18

Soil C, P and microbial biomass C, P response to different fertilizations in the hillslope cropland of purple soil.

GAO Yang^1,5, XU Ya-juan², PENG Yan^1,3, JIN Jin^1,4, ZHU Bo⁵, YU Gui-rui^1

(¹Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; ²Central South University of Forestry and Technology, Changsha 410000, China; ^3Changjiang Institute of Technology, Wuhan 430212, China; ⁴Beijing GeoEnviron Engineering & Technology Inc.， Beijing 100095, China; ⁵Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China)

Online:2015-01-18 Published:2015-01-18

摘要/Abstract

摘要：

分析了长期不同施肥处理下紫色土坡耕地土壤碳(C)、磷(P)与微生物生物量C(MBC)、P(MBP)的变化及其耦合特征.结果表明: 农家肥或秸秆配施无机肥(包括N、NP和NPK)处理下紫色土坡耕地土壤总有机碳(TOC)变化范围为90.8～100.8 g·kg^-1,高于单施氮肥处理的62.2 g·kg^-1;农家肥与无机肥配施处理下土壤总磷(TP)变化范围为0.65～0.84 g·kg^-1,而秸秆与无机肥配施处理下土壤TP仅为农家肥与无机肥配施的23%～38%;单施氮肥处理下MBP显著小于农家肥和秸秆与无机肥配施处理;农家肥和秸秆配施无机肥处理下MBC/MBP在5～26,TOC/TP分别在92～137和296～653,而单一氮肥处理下MBC/MBP和TOC/TP分别高达59和2000.表明农家肥和无机肥配施更有利于增加土壤P的有效性,提高土壤供P潜力.

Abstract: The aim of this study is to explore the changes and coupling characteristics of carbon (C), phosphorus (P) and microbial C, P in a hillslope cropland of purple soil. The results showed that total organic carbon (TOC) ranged from 90.8 to 100.8 g·kg^-1 under organic fertilizer or straw combined with inorganic fertilizer treatments (including N, NP and NPK) as compared with nitrogen (N) application only (62.2 g·kg^-1). Total phosphorus (TP) ranged from 0.65 to 0.84 g·kg^-1 in organic combined with inorganic fertilization treatments, and that under straw combined with inorganic fertilizer treatments was 23%-38% of organic fertilizer combined with inorganic fertilization treatments. The microbial biomass phosphorus (MBP) under N fertilizer was significantly decreased as compared with combined fertilization treatments. The ratios of microbial biomass carbon (MBC) to MBP under combined fertilization treatments were between 5 to 26, and the TOC/TP ratios under organic fertilizer and straw combined treatments were between 92 to 137 and 296 to 653, respectively, while those under N fertilizer treatment were 59 and 2000, respectively. The results indicated that combined organic and inorganic fertilizers would be helpful for enhancing P availability and increasing its potential capacity in purple soil.

高扬1,5**,徐亚娟2,彭焱1,3,金晶1,4,朱波5,于贵瑞1. 紫色土坡耕地C、P与微生物生物量C、P对不同施肥的响应[J]. 应用生态学报.

GAO Yang1,5, XU Ya-juan2, PENG Yan1,3, JIN Jin1,4, ZHU Bo5, YU Gui-rui1. Soil C, P and microbial biomass C, P response to different fertilizations in the hillslope cropland of purple soil.[J]. Chinese Journal of Applied Ecology.