新疆农业科学2017，Vol.54Issue(5)：961-968,8.DOI:10.6048/j.issn.1001-4330.2017.05.022
禁牧年限对退化伊犁绢蒿荒漠土壤有机碳库和微生物碳、氮的影响
Effects of Grazing Exclusion Times on Soil Organic Carbon Storage and Microbial Biomass Carbon and Nitrogen in Degraded Seriphidium transiliense Desert
摘要
Abstract
[Objective] This project aims to reveal the response of desert organic carbon storage and microbial biomass carbon and nitrogen to grazing exclusion times in order to provide scientific basis for restoration, management and utilization of degraded desert.[Method]The method of spatial sequence instead of the time series was used, and the soil organic carbon storage (SOC), microbial biomass carbon (MBC) and nitrogen (MBN) under different grazing exclusion times (1 a, 4 a and 11 a) in degraded desert of Seriphidium transiliense were studied.[Result]The results showed that: (1) The SOC in grazing exclusion area in 0-30 cm layer decreased by 13.3%-24.3% compared with the freely grazing area, but the SOC in 0-10 cm layer decreased at first and then increased with grazing exclusion times increased.(2) With the increase of grazing exclusion times, the MBC storage in 0-30 cm layer decreased at first and then increased, but the MBN storage was not significantly different for grazing exclusion (P>0.05), and the MBC could be used as an early indicator to measure the recovery of degraded desert.[Conclusion]Short-term grazing exclusion is not effective to recover the soil of S.transiliense desert but the long-term grazing exclusion can effectively improve soil quality.In a word, grazing exclusion was the most economical and convenient way to recover the degraded desert.关键词
围栏封育/土壤碳库/微生物量碳/微生物量氮Key words
grazing exclusion/fencing/soil organic carbon/microbial biomass carbon/microbial biomass nitrogen分类
农业科技引用本文复制引用
董乙强,安沙舟,孙宗玖,杨静..禁牧年限对退化伊犁绢蒿荒漠土壤有机碳库和微生物碳、氮的影响[J].新疆农业科学,2017,54(5):961-968,8.基金项目
国家自然科学基金项目"不同退化蒿类荒漠土壤有机碳组及其碳氮特征对禁牧的响应"(31160477) （31160477）
国家自然科学基金项目"基于高光谱遥感的退化伊犁绢蒿荒漠草地围栏恢复特征的研究"(31360571) （31360571）
Supported by the National Natural Science Foundation of China "The Fractions of Soil Organic Carbon for Different Degraded Artemisia Desert Grasslands Response to Grazing Exclusion" (31160477) （31160477）
Supported by the National Natural Science Foundation of China "Study on the Recovery Characteristics by Hyperspectral Remote Sensing to the Degraded Seriphidium transiliense Desert Grassland (31360571) （31360571）
