干旱区生态环境知识资源中心(Arid): 凋落物添加条件下咸水灌溉对风沙土CO

Arid

	凋落物添加条件下咸水灌溉对风沙土CO_2排放及化学性质的影响
其他题名	Effects of saline irrigation on CO_2 emission and chemical properties of aeolian sandy soil under litter addition
	张少磊; 张建国; 常闻谦; 吴路遥; 张阿凤
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2020
卷号	31 期号:11
中文摘要	沙拐枣作为塔克拉玛干沙漠公路防护林主要优势物种之一,其凋落物在该区域的碳循环过程中具有重要作用。采用室内培养试验测定了沙拐枣凋落物添加后,在25 %、50%、 75%、100%田间持水量的咸水(SW)和淡水(FW)灌溉条件下,风沙土CO_2排放、土壤有机碳(SOC) 、可溶性有机碳(DOC) 、pH和电导率(EC)的动态变化。结果表明:咸水灌溉对土壤CO_2排放具有抑制作用,在4种土壤含水量处理下,淡水灌溉比咸水灌溉的CO_2累积排放量增加1.9%~29.1%;土壤CO_2累积排放量随土壤含水量的增加而升高;在沙拐枣凋落物添加条件下,SOC在前期迅速下降,但后期所有处理SOC 均逐渐升高后趋于稳定;培养结束时,各处理DOC含量比培养前提高了41.3% ~ 92.4%;在培养结束时各处理与培养前相比pH升高了0.20~0.35; EC随土壤含水量的增加而升高,培养结束时在4种含水量条件下,咸水灌溉下EC比培养前增加了0.11~0.79 mS·cm~(-1),而淡水灌溉下EC比培养前有增有减。土壤CO_2累积排放量与SOC、DOC、pH呈显著正相关,但与土壤含水量相关性不显著。凋落物添加条件下咸水灌溉以及较低的含水量条件均能抑制风沙土CO_2的排放,EC受灌溉水质和土壤含水量的影响较大。
英文摘要	Calligonum mongolicum is one of the dominant species in the Taklimakan Desert highway shelterbelt,the litter of which plays an important role in carbon cycling. After litter addition,we carried out a laboratory incubation experiment to investigate the dynamics of soil CO_2 emission,soil organic carbon (SOC),soluble organic carbon (DOC),pH,and electrical conductivity (EC) under the condition of salt water (SW) and fresh water (FW) with field water holding capacity of 25%,50%,75%,and 100%. The results showed that saline water irrigation had an inhibitory effect on soil CO_2 emission. Under the four soil water content treatments,the cumulative CO_2 emission of freshwater irrigation increased by 1.9%-29.1% compared with that of saline irrigation. Cumulative soil CO_2 emissions increased with increasing soil water content. With litter addition,SOC decreased rapidly in the early stage,then gradually increased,and finally tended to be stable. The DOC contents of each treatment following the incubation increased by 41.3%-92.4% compared with that before the incubation. At the end of incubation,soil pH of each treatment increased by 0.20-0.35. The EC increased with the increases of soil water content. Under the four water content conditions and compared with the situation before the incubation,the EC values irrigated with SW increased by 0.11-0.79 mS·cm~(-1),while those with FW increased or decreased at the end of incubation. Cumulative soil CO_2 emission was positively correlated with SOC,DOC,and pH,but not with soil water content. Both saline irrigation and lower water content could inhibit CO_2 emission of aeolian sandy soil under litter addition,while EC was significantly affected by the quality of irrigation water and soil water content.
中文关键词	凋落物添加 ; 土壤含水量 ; 咸水灌溉 ; CO_2排放
英文关键词	litter addition soil water content saline irrigation CO_2 emission
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:6846865
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/2XILL650/353978
作者单位	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, 陕西 712100, 中国. 张建国, 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, 陕西 712100, 中国. 常闻谦, 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, 陕西 712100, 中国. 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, 陕西 712100, 中国. 张阿凤, 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, 陕西 712100, 中国.
推荐引用方式 GB/T 7714	张少磊,张建国,常闻谦,等. 凋落物添加条件下咸水灌溉对风沙土CO_2排放及化学性质的影响[J]. 西北农林科技大学,2020,31(11).
APA	张少磊,张建国,常闻谦,吴路遥,&张阿凤.(2020).凋落物添加条件下咸水灌溉对风沙土CO_2排放及化学性质的影响.应用生态学报,31(11).
MLA	张少磊,et al."凋落物添加条件下咸水灌溉对风沙土CO_2排放及化学性质的影响".应用生态学报 31.11(2020).