干旱区生态环境知识资源中心(Arid): 旱作条件下轮作模式和秸秆还田对土壤碳平衡的影响

Arid

	旱作条件下轮作模式和秸秆还田对土壤碳平衡的影响
其他题名	Responses of Carbon Balance to Rotation Regimen and Straw Returning in Dry Land
	张青 1; 李慧瑛 2; 孙媛 1; 谭春荐 2; 郝雯辉 2; 任广鑫 2; 冯永忠 2
来源期刊	西北农业学报
ISSN	1004-1389
出版年	2014
卷号	23 期号:11 页码:212-218
中文摘要	为稳定农田土壤碳库,减少土壤碳元素流失,在西北农林科技大学校内试验基地开展为期2 a的田间定位试验,研究麦豆轮作及秸秆覆盖量对土壤碳平衡影响。以麦闲轮作秸秆不还田(S_0)、秸秆全量还田(S_1)、秸秆半量还田(S_1/2)为对照,设置麦豆轮作S_0、S_1、S_1/2等处理,采用GXH-3010E1型便携式红外线分析仪及重铬酸钾加热法分别测定土壤碳排放通量和土壤有机碳质量分数。结果表明,2 a试验期间,单位空间土壤(1 m~3)有机碳储量均发生变化,麦闲轮作土壤有机碳储量提升0.9210~5 kg·m~(-3),麦豆轮作提升2.1110~5 kg·m~(-3)。其中,麦闲轮作S_1/2处理增加1.6410~5 kg·m~(-3),S_1处理增加3.6310~5 kg·m~(-3);麦豆轮作S_1/2处理增加0.4510~5 kg·m~(-3),S_1处理保持稳定。观测期内麦闲地土壤碳排放通量最高值为9 000 kg·m~(-2)·h~(-1),麦豆地最高值为6 000 kg·m~(-2)·h~(-1);与麦闲区相比,麦豆轮作区碳排放总量降低了1.3610~3 kg·m~(-2),S_1/2处理碳排放总量最低。在黄土旱区实行少耕麦豆轮作半量秸秆还田有助于稳定土壤碳库减少土壤碳排放。
英文摘要	In order to steady soil carbon pool and reduce soil carbon loss, two years field test was conducted at northwest A&F University to explore the effects of summer-soybean/winter-wheat rotation and different straw management on soil carbon balance. The test set no straw (S_0), half quantity straw return(S_1/2),total straw return (S_1) under summer-soybean/winter-wheat rotation treatment, with regarding summer-fallow/winter-wheat rotations as control treatment, by using GXH-3010E1 portable infrared analyzer and potassium dichromate heating method to determine soil carbon emission flux and soil organic carbon content. The results showed that:after two years, the unit space (1 m~3) soil organic carbon storage both changed, wheat-fallow rotation increased 0.9210~5 kg·m~(-3) and wheat-soybean rotation increased 2.1110~5 kg·m~(-3). S_1/2 and S_1 treatment of wheat-fallow rotation increased 1.6410~5 kg·m~(-3), 3.6310~5 kg·m~(-3),respectively, compared with 0.4510~5 kg·m~(-3), 0 kg·m~(-3) of wheat-soybean rotation. The highest carbon emission flux of summer-fallow/winter-wheat mode was 9 000 kg·m~(-2)·h~(-1), while 6 000 kg·m~(-2)·h~(-1) in Summer-soybean/winter-wheat mode. Compared with summer-fallow/winter-wheat mode, total carbon emission of summer-soybean/winter-wheat mode decreased by 1.3610~3 kg·m~(-2), and reached the lowest in S_(1/2) treatment. In semi-arid loess area, half quantity straw returning in summer-soybean/winter-wheat rotation could be helpful for stabilizing soil carbon pool and cutting carbon emission.
中文关键词	轮作 ; 秸秆还田 ; 有机碳质量分数 ; 碳储量 ; 碳通量
英文关键词	Rotation Straw returning SOC content Carbon storage Carbon flux
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:5295095
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/2XILL650/231902
作者单位	1.西北农林科技大学林学院, 陕西省循环农业工程技术研究中心, 杨凌, 陕西 712100, 中国; 2.西北农林科技大学农学院, 陕西省循环农业工程技术研究中心, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	张青,李慧瑛,孙媛,等. 旱作条件下轮作模式和秸秆还田对土壤碳平衡的影响[J]. 西北农林科技大学,2014,23(11):212-218.
APA	张青.,李慧瑛.,孙媛.,谭春荐.,郝雯辉.,...&冯永忠.(2014).旱作条件下轮作模式和秸秆还田对土壤碳平衡的影响.西北农业学报,23(11),212-218.
MLA	张青,et al."旱作条件下轮作模式和秸秆还田对土壤碳平衡的影响".西北农业学报 23.11(2014):212-218.