干旱区生态环境知识资源中心(Arid): 持续棉秆还田对新疆棉田土壤可矿化碳库的影响

Arid

	持续棉秆还田对新疆棉田土壤可矿化碳库的影响
其他题名	Effect of Continuous Straw Returning on Soil Mineralizable Carbon Pool of Long-term Cotton-cropping Field in Oasis of Xinjiang
	魏飞 1; 黄金花 2; 马芳霞 1; 景峰 1; 刘建国 1
来源期刊	土壤
ISSN	0253-9829
出版年	2017
卷号	49 期号:2 页码:295-301
中文摘要	依据新疆绿洲棉花长期连作的微区定位试验,研究了在秸秆还田和不还田处理下,棉田土壤有机碳矿化特征,以及土壤有机碳释放随棉花秸秆还田年限的变化规律.结果表明:秸秆还田与不还田处理相比增加了0 ~ 60 cm土层土壤的总有机碳(TOC)、可矿化碳(MC)的含量和矿化速率(MR),并且随着秸秆还田年限的加长呈上升趋势,但随土层的加深而下降.持续秸秆还田后棉田随着秸秆还田时间增加土壤有机碳矿化速率、累积矿化排放量(CO_2-C排放量)增加,但矿化强度呈降低趋势,而棉花连作但秸秆不还田的棉田变化趋势与之相反.说明棉花秸秆还田措施增加了新疆绿洲棉田土壤有机碳含量,土壤中有机碳虽然不断得到补充,但尚未达到饱和状态,随着秸秆还田时间延长棉田固碳能力下降.
英文摘要	Based on the long-term experiment in long-term cotton-cropping field, this paper analyzed the characteristics of soil organic carbon mineralization and the change patterns of soil organic carbon release under the conditions with and without straw returning. The results showed that straw returning increased soil total organic carbon (TOC) and mineralizable carbon (MC) contents and mineralization rate (MR) in 0 - 60 cm soil layer, and trended to increase with the increase of cropping year but to decease with the increase of soil depth. With the increase of continuous cropping years, soil organic carbon MC and cumulative mineralized emissions (CO_2-C emissions) showed an increasing tendency, however, mineralization intensity showed a decreasing tendency with straw returning, while showed opposite tendencies without straw returning. It demonstrates that straw returning promotes soil biological activity, compensates soil organic carbon but not enough to stabilize or increase carbon sequestration capacity of long-term continuous cotton-cropping field of Xinjiang Oasis.
中文关键词	秸秆还田 ; 棉田 ; 土壤可矿化碳 ; 碳库特征
英文关键词	Straw returning to soil Cotton field Soil mineralizable carbon Characteristics of carbon pool
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5973864
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236753
作者单位	1.石河子大学, 新疆兵团绿洲生态农业重点实验室, 石河子, 新疆 832003, 中国; 2.克拉玛依市克拉玛依区农林水牧局, 克拉玛依, 新疆 834000, 中国
推荐引用方式 GB/T 7714	魏飞,黄金花,马芳霞,等. 持续棉秆还田对新疆棉田土壤可矿化碳库的影响[J]. 石河子大学,2017,49(2):295-301.
APA	魏飞,黄金花,马芳霞,景峰,&刘建国.(2017).持续棉秆还田对新疆棉田土壤可矿化碳库的影响.土壤,49(2),295-301.
MLA	魏飞,et al."持续棉秆还田对新疆棉田土壤可矿化碳库的影响".土壤 49.2(2017):295-301.