黄土丘陵区撂荒山地枣林土壤有机碳储量和土壤储水量耦合效应分析  

Coupling Effect Analysis of Soil Organic Carbon Storage and Soil Water Storage in Ziziphus jujuba Forests on Abandoned Barren Hills in Loess Hilly Region

作　　者：臧凯旋 强方方 刘登强[1] 刘广全[2] 刘盈斐[2] 古孟怡 刘长海[1] 艾宁[1] ZANG Kaixuan;QIANG Fangfang;LIU Dengqiang;LIU Guangquan;LIU Yingfei;GU Mengyi;LIU Changhai;AI Ning(College of Life Science,Yanan University,Yanan 716000,Shaanxi,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]延安大学生命科学学院,陕西延安716000 [2]中国水利水电科学研究院,北京100038

出　　处：《西北林学院学报》2024年第5期144-150,175,共8页Journal of Northwest Forestry University

基　　金：“十四五”国家重点研发计划(2023YFF130510401);国家自然科学基金(U2243601,32060297);大学生创新创业训练计划项目(S202210719133,S202210719031)。

摘　　要：土壤有机碳和土壤水分是黄土丘陵区陆地生态系统生产力可持续发展的重要驱动因素,土地撂荒对土壤有机碳储量和土壤储水量具有重要影响。为研究土壤有机碳储量和土壤储水量对撂荒年限的响应及其耦合关系,以陕北黄土丘陵区齐家山红枣试验示范基地不同撂荒年限山地枣林为对象进行研究,结果表明:1)研究区土壤表层(0~20 cm)土壤有机碳储量随撂荒年限延长呈明显增加趋势,SOCS和SWS在不同撂荒年限均呈正相关关系。2)综合权衡分析和均方根误差分析表明,撂荒10 a最适宜进行山地枣林改造,但综合考虑农户经济收入与改造投入力度,建议撂荒3~6 a后对山地枣林进行改造,但要考虑土壤氮、磷对枣林的影响。研究结果为研究区撂荒山地枣林改造提供了数据支撑与科学依据。Soil organic carbon and soil moisture are important driving factors for the sustainable development of terrestrial ecosystems in loess hilly region.Abandoned land has an important impact on soil organic carbon storage(SOCS)and soil water storage(SWS).In order to study the response of SOCS and SWS to the years of abandonment and their coupling relationship,we selected jujuba forests in the Qijiashan Jujube Experiment Demonstration Base as the research objects.The results showed 1)in the study area,SOCS showed a significant increase with the increase of abandonment years in the surface layer(0-20 cm)of the soil,and both SOCS and SWS showed positive correlations with different abandonment years.2)Comprehensive trade-off analysis and root-mean-square error calculation revealed that 10a of abandonment was the most suitable time for the transformation of mountainous jujube forests.However,considering the economic income of the farmers and investment in the transformation,it is recommended that the jujube forest should be transformed at 3-6 years after the forest was abandoned,and the effects of soil nitrogen and phosphorus on the jujube forests should be considered.The results of this study can provide data support and scientific basis for transformation of abandoned mountainous jujube forests in the future.

关 键 词：山地枣林 土壤有机碳储量 土壤储水量 耦合相互作用 权衡分析 

分 类 号：S714.7[农业科学—林学]