首页|不同类型土壤引黄灌溉固碳效应的对比研究

不同类型土壤引黄灌溉固碳效应的对比研究

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  • 国家科技期刊平台
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通过在宁夏引黄灌区实地调查、采样与分析,研究5种类型土壤在不同灌溉耕作时间序列下土壤有机碳含量及碳密度的变化特征,对比分析不同类型土壤对引黄灌溉耕作固碳效应的差异.结果表明:灌溉耕作引起的土壤有机碳含量的变化因土壤类型的不同而存在差异；在相同的灌溉耕作时间下,5种类型土壤的有机碳密度大小顺序为:灌淤土＞潮土＞新积土＞风沙土＞淡灰钙土；与同类型未灌溉耕作的土壤比较,灌溉耕作使各类型土壤有机碳密度均有不同程度的增加,相同的灌溉耕作时间下土壤有机碳密度增幅排列次序为:风沙土＞潮土＞灌淤土＞淡灰钙土＞新积土.宁夏引黄灌区的土壤固碳效应因土壤类型的不同存在明显差异.
EFFECT OF IRRIGATION WITH WATER DIVERTED FROM THE YELLOW RIVER ON CARBON SEQUESTRATION IN SOILS OF DIFFERENT TYPES IN NINGXIA IRRIGATION ZONE
Irrigation and cultivation are two important driving forces of variation of soil organic carbon density (SOCD). The Ningxia Irrigation Zone using water diverted from the Yellow River in irrigation was selected as a case for study, and 48 sampling points were set up in five types of soils to study characteristics of soil organic carbon (SOC) and SOCD in these soils under different cultivation and irrigation time series, and analyze differences among the soils in effect of irrigation and cultivation on carbon sequestration. Results show that the effect of irrigation and cultivation on carbon sequestration varied with the soil. The same in irrigation and cultivation history, the five types of soils followed a decreasing order of Irrigated-alluvial soils > Fluvo-aquic soils > Fluvent soils > Aeolian sandy soil > Sierozem soil in SOCD. Irrigation and cultivation increased SOCD to a varying degree in these soils, which followed Aeolian sandy soil > Fluvo-aquic soils > Irrigated-alluvial soils > Sierozem soil > Fluvent soil. The differences among the soils in effect of irrigation and cultivation on carbon sequestration are significant in the Ningxia Irrigation Zone.

Irrigation with water diverted from the Yellow RiverSoil organic carbonSoil organic carbon densityDifference

董林林、杨浩、于东升、张海东、刘杨、史学正

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南京师范大学地理科学学院,南京210097

南京师范大学地理科学学院南京210097

土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008

引黄灌溉 土壤有机碳含量 土壤有机碳密度 差异性

国家重点基础研究发展计划“973”项目中国科学院知识创新工程项目中国科学院知识创新工程项目

2010CB950702KZCX2-YW-Q1-07KSCXl-YW-09-01&02

2011

土壤学报
中国土壤学会

土壤学报

CSTPCDCSCD北大核心
影响因子：2
ISSN：0564-3929
年,卷(期)：2011.48(5)
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