干旱区生态环境知识资源中心(Arid): 极端干旱区咸水灌溉人工防护林土壤可溶性碳的垂直分布及其影响因素

Arid

	极端干旱区咸水灌溉人工防护林土壤可溶性碳的垂直分布及其影响因素
其他题名	Vertical Distribution of Soil Dissolved Carbon and Its Influencing Factors in the Artificial Shelterbelt Irrigated with Saline Water in an Extreme Drought Desert
	孟天歌; 吴路遥; 张少磊; 徐燕莹; 李雄; 张建国
来源期刊	环境科学
ISSN	0250-3301
出版年	2020
卷号	41 期号:4 页码:1950-1959
中文摘要	可溶性碳( DC)是土壤中最活跃的碳组分,植被恢复与重建加速了干旱荒漠区的碳循环过程.研究咸水灌溉下沙漠人工防护林地土壤剖面DC的分布,可为干旱荒漠区人工林的管理和开发利用提供理论支撑和决策依据.本研究选取塔克拉玛干沙漠公路沿线5个不同矿化度咸水滴灌林地作为研究样地,流沙地为对照( CK), 分析并讨论了0 ~ 1 m剖面土壤可溶性有机碳( SDOC)和可溶性无机碳( SDIC)的垂直分布特征及其与各因子间的相关关系.结果表明,CK与2.82 g·L~(-1)矿化度滴灌处理SDOC、SDIC呈I 型分布,其分布满足线性函数关系,其他各样地SDOC和SDIC均呈Gamma型分布,分布满足幂函数关系;所有处理表层SDOC、SDIC波动能力及贡献度均高于下层土壤,且SDOC波动及贡献度均大于SDIC,2.82 g·L~(-1)之外的各林地SDOC平均含量是SDIC的2 ~ 4倍; 2.82 g·L~(-1)样地SDOC平均含量低于CK,其他各样地SDOC是CK的3 ~ 5倍,各样地SDIC含量较CK增加了15.0%~ 57.9%;矿化度高于2.82 g·L~(-1)的样地0 ~ 5 cm土层SDOC含量随灌溉水矿化度的增加而增加,各样地SDIC含量随矿化度的升高呈先增加后下降低趋势,4.82 g·L~(-1)样地达到最大. SDOC和SDIC与灌溉水矿化度、EC、SOC、 SIC及土壤含水量均呈正相关关系,其中与土壤含水量表现出弱正相关,SDOC和SDIC与土层深度呈负相关关系; SDOC和SDIC与pH分别呈微弱的负相关和微弱的正相关.总之,灌溉水矿化度对SDOC和SDIC的垂直分布具有重要影响,同时与土壤含水量、土层深度、EC、SOC和SIC等因素紧密相关,这对极端干旱区人工林建设及管护具有重要意义.
英文摘要	Dissolved carbon ( DC) is the most active carbon fraction in soils. Vegetation restoration and reconstruction accelerate the carbon cycle in arid desert regions. Studying the DC distribution in soil profiles of artificial shelterbelt under saline irrigation can provide theoretical support and decision-making basis for artificial shelterbelt management,development,and utilization in arid desert areas. In this study,we took the artificial shelterbelts drip-irrigated with five different mineralization and one shifting sandy land ( CK) along the Taklimakan Desert Highway as sampling plots,analyzed and discussed the vertical distribution characteristics of soil dissolved organic carbon ( SDOC) and dissolved inorganic carbon ( SDIC) in the 0-1 m profiles,and further analyzed their relationships among different factors. The results showed that SDOC and SDIC of CK and shelterbelts under 2.82 g·L~(-1) irrigation showed anItype distribution with a linear function relationship. The SDOC and SDIC of four other treatments showed aGammatype distribution with power function relationships. The fluctuation ability and contribution degree of SDOC and SDIC of different treatments in the surface layer were higher than those in the lower layers,and the fluctuation and contribution intensity of SDOC were higher than those of SDIC. Except for 2.82 g·L~(-1) treatment,the average SDOC contents of other treatments were 2-4 times those of SDIC. The average SDOC content of 2.82 g·L~(-1) treatment was lower than CK; other treatments were 3-5 times that of CK; and the average SDIC content of all treatments increased 15.0%-57.9% than CK. For the 0-5 cm layer,SDOC content increased with the irrigation water mineralization except the 2.82 g·L~(-1) treatment,but SDIC content firstly increased and then decreased with increasing mineralization,and that for the 4.82 g·L~(-1) treatment was highest. The SDOC and SDIC were positively correlated with EC,SOC,irrigation water mineralization,SIC, and soil moisture,for which they both showed a weak positive correlation with soil moisture; they were negatively correlated with soil depth. The SDOC and SDIC showed a weak negative correlation and a weak positive correlation with pH,respectively. In summary, the mineralization of irrigation water has an important impact on the vertical distribution of SDOC and SDIC,and their distribution also has close relationships with EC,SOC,SIC,soil moisture,and soil depth,which is of great significance for plantations in extremely drought deserts.
中文关键词	土壤可溶性有机碳( SDOC) ; 土壤可溶性无机碳( SDIC) ; 土壤可溶性碳( SDC) ; 咸水灌溉 ; 沙漠公路防护林
英文关键词	soil dissolved organic carbon ( SDOC) soil dissolved inorganic carbon ( SDIC) soil dissolved carbon ( SDC) saline irrigation desert highway shelterbelt
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6710754
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336411
作者单位	孟天歌, 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 杨凌, 712100.; 吴路遥, 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 杨凌, 712100.; 张少磊, 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 杨凌, 712100.; 徐燕莹, 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 杨凌, 712100.; 李雄, 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 杨凌, 712100.; 张建国, 西北农林科技大学资源环境学院;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 农业部西北植物营养与农业环境重点实验室;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌;;杨凌, ;; 712100;;712100.
推荐引用方式 GB/T 7714	孟天歌,吴路遥,张少磊,等. 极端干旱区咸水灌溉人工防护林土壤可溶性碳的垂直分布及其影响因素[J]. 西北农林科技大学,2020,41(4):1950-1959.
APA	孟天歌,吴路遥,张少磊,徐燕莹,李雄,&张建国.(2020).极端干旱区咸水灌溉人工防护林土壤可溶性碳的垂直分布及其影响因素.环境科学,41(4),1950-1959.
MLA	孟天歌,et al."极端干旱区咸水灌溉人工防护林土壤可溶性碳的垂直分布及其影响因素".环境科学 41.4(2020):1950-1959.