Effects of Soil Properties on CH4 absorption Under Different Cultivation Years of Grassland Reclamation

doi:10.11733/j.issn.1007-0435.2010.02.002

›› 2010, Vol. 18 ›› Issue (2): 148-153.DOI: 10.11733/j.issn.1007-0435.2010.02.002

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Effects of Soil Properties on CH₄ absorption Under Different Cultivation Years of Grassland Reclamation

ZHAO Jiang-hong¹, JIAO Yan¹, XU Zhu², NA Ri-su²

1. College of Chemistry and Environmental Sciences, Inner Mongolia Normal University, Huhhot, Inner Mongolia Autonomous Region 010022, China;
2. Institute of Grassland Sciences, Chinese Academy of Agricultural Sciences, Huhhot, Inner Mongolia Autonomous Region 010022, China

Received:2009-10-10 Revised:2010-01-04 Online:2010-04-15 Published:2010-04-15

不同天然草地开垦年限下土壤特性对CH₄吸收的影响

赵江红¹, 焦燕¹, 徐柱², 那日苏²

1. 内蒙古师范大学化学与环境科学学院, 呼和浩特, 010022;
2. 中国农业科学院草原研究所, 呼和浩特, 010022

通讯作者: 焦燕,E-mail:jiaoyan@imnu.edu.cn
作者简介:赵江红(1980- ),女,河南三门峡人,硕士研究生,研究方向为环境生态学,E-mail:jianghong-308@163.com
基金资助:
国家重点基础研究发展计划973项目(2007CB106806);中央级公益性科研院所基本科研业务费专项基金;国家重点实验室开放课题(LAPC-KF-2008-3)资助

Abstract

Abstract: The effects of reclamation years(5,10,50 years)on CH₄ absorption of the cropland converted from natural grassland were studied using a laboratory incubation method in Taipusi County of the Inner Mongolia Autonomous Region.The CH₄ uptake was reduced significantly after grassland was changed into cropland.Reclamation years influence significantly soil CH₄ absorption(F=20.998,P<0.001),the longer the reclamation years,the less the absorption.Soil CH₄ uptake was the highest in grassland and the lowest in 50 years cropland.With natural grassland as control,soil CH₄ uptake of five years cropland,ten years cropland,fifty years cropland decreased by 17.1%,44.1%,and 50.1%,respectively.Cumulative CH₄ uptake decreased with soil organic carbon(SOC),total nitrogen(TN),microbial biomass carbon(BC) and microbial biomass nitrogen(BN).Correlation analysis indicated that the main influencing factors of soil CH₄ absorption were SOC,TN,BC and BN.

Key words: Natural grassland, Reclamation years, Soil properties, CH₄ uptake

摘要： 通过培养实验,称取过2mm筛的风干土样50g于300mL的培养瓶中,调节含水量至25%(W/W)后密封,在(25±1)℃条件下恒温培养一周,探讨内蒙古锡盟太仆寺旗典型草原天然草地转变为农田后,在相同的水分温度条件下,不同开垦年限(5、10、50年)农田的土壤特性对CH₄吸收的影响。结果表明:天然草地转变为农田后降低了土壤吸收CH₄的能力,开垦年限对CH₄吸收有显著影响(F=20.998,P<0.001),CH₄的吸收量随开垦年限的增加而逐渐降低,4个样地土壤CH₄的吸收量按大小顺序为:天然草地>开垦5年的农田>开垦10年的农田>开垦50年的农田,以天然草地为对照,开垦5年、10年、50年后农田土壤CH₄的吸收量分别降低了17.1%、44.1%、50.1%;CH₄的累积吸收量随土壤有机碳、全氮含量和微生物生物量碳、氮的降低而降低,单因子相关分析表明,土壤有机碳含量、全氮含量、土壤微生物量碳、氮是影响土壤CH₄吸收的主要因子。

关键词: 天然草地, 开垦年限, 土壤性质, CH₄吸收

CLC Number:

S151.9

ZHAO Jiang-hong, JIAO Yan, XU Zhu, NA Ri-su. Effects of Soil Properties on CH₄ absorption Under Different Cultivation Years of Grassland Reclamation[J]. , 2010, 18(2): 148-153.

赵江红, 焦燕, 徐柱, 那日苏. 不同天然草地开垦年限下土壤特性对CH₄吸收的影响[J]. , 2010, 18(2): 148-153.

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Effects of Soil Properties on CH₄ absorption Under Different Cultivation Years of Grassland Reclamation

不同天然草地开垦年限下土壤特性对CH₄吸收的影响

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