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题名: Continuous plastic-film mulching increases soil aggregation but decreases soil pH in semiarid areas of China
作者: Wang, L; Li, XG; Lv, JT; Fu, TT; Ma, QJ; Song, WY; Wang, YP; Li, FM
收录类别: SCIE
出版日期: 2017-04
刊名: SOIL & TILLAGE RESEARCH
卷号: 167, 页码:46-53
出版者: ELSEVIER
出版地: AMSTERDAM
英文摘要: Plastic-film mulch is a globally applied agricultural practice. However, its effects on soil aggregation and pH have been hardly studied. We assessed the effects of plastic-film mulch on soil aggregate water stability and pH in fields used for maize (Zea mays L.) production, at two sites in a cold semiarid environment, China. Four treatments were used: (i) no plastic-film mulch and no straw incorporation, (ii) plastic-film mulch only, (iii) straw incorporation only, and (iv) straw incorporation plus mulch. Seven years after continuous treatment application, the use of plastic-film mulch increased the proportion of water-stable macroaggregates (>0.25 mm) in the top 15-cm soil layer by 16-28%, across sampling times and sites. Straw incorporation similarly increased the proportion of water-stable macroaggregates. However, the effects of mulch, on increasing the mean weight diameter of aggregates were greater in non-straw-incorporated soils than in straw-incorporated soils, and vice versa. Soil bulk density in the top 15-cm soil layer marginally increased in the mulched treatments, relative to the non-mulched treatments, while it decreased in straw-incorporated treatments. In addition, there was a decrease in soil pH, by 0.19-0.54 units, in the mulched, relative to the non-mulched soils. Combining our previous results, we suggested that increases in maize root growth and microbial activity were linked to the increased soil aggregation while accumulation in soil nitrate resulting from the stimulated soil nitrogen mineralization was responsible for the marginally decreased soil pH in the plastic-film mulched relative to the non mulched soils, due to increased soil hydrothermal conditions. (C) 2016 Elsevier B.V. All rights reserved.
关键词: Maize ; Root biomass ; Water-stable aggregates ; Bulk density ; Soil acidification ; Soil warming
作者部门: [Wang, Lin ; Li, Xiao Gang ; Lv, Jieting ; Fu, Taotao ; Ma, Qiujin ; Song, Wenyuan ; Wang, Yong Peng ; Li, Feng-Min] Lanzhou Univ, Sch Life Sci, Inst Arid Agroecol, State Key Lab Grassland & Agroecosyst, 222 South Tianshui Rd, Lanzhou 730000, Peoples R China
通讯作者: Li, XG (reprint author), Lanzho Univ, Sch Life Sci, 222 South Tianshui Rd, Lanzhou 730000, Peoples R China.
学科分类: Agriculture
文章类型: Article
所属项目编号: State Technology Support Program [2011BAD29B04]
所属项目名称: 国家科技支撑计划
项目资助者: MOST
语种: 英语
DOI: 10.1016/j.still.2016.11.004
ISSN号: 0167-1987
WOS记录号: WOS:000393005600005
IR记录号: WOS:000393005600005
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189426
Appears in Collections:生命科学学院_期刊论文

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Recommended Citation:
Wang, L,Li, XG,Lv, JT,et al. Continuous plastic-film mulching increases soil aggregation but decreases soil pH in semiarid areas of China[J]. SOIL & TILLAGE RESEARCH,2017,167:46-53.
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