| 棉秆炭特性及其对灰漠土土壤有机碳矿化的效应 |
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| 引用本文： | 唐光木,徐万里,顾美英,姚红宇,蒲胜海,胡克林.棉秆炭特性及其对灰漠土土壤有机碳矿化的效应[J].生态学报,2019,39(5):1795-1803. |
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| 作者姓名： | 唐光木 徐万里 顾美英 姚红宇 蒲胜海 胡克林 |
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| 作者单位： | 中国农业大学资源与环境学院;新疆农业科学院土壤肥料与农业节水研究所;新疆农业科学院微生物应用研究所 |
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| 基金项目： | 公益性行业（农业）科研专项经费专项（201503136）；国家自然科学基金（41261059，41161055） |
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| 摘 要： | 生物炭具有提高土壤肥力和减缓温室气体排放的作用,但其对土壤有机碳矿化的作用效应存在争议。以新疆灰漠土为研究对象,采用300℃和600℃制备的棉花秸秆炭(棉杆炭)为试材,在25℃、75%的土壤饱和含水量条件下,通过100 d的室内培养,研究了不同比例的棉杆炭添加(0、0.1%、0.5%、1.0%、2.0%和100%,以质量计)对土壤有机碳矿化的效应。结果表明:1)高温制备的棉杆炭,孔隙结构排列整齐,表面光滑,孔隙度和比表面积大,芳香化程度增强;2)棉杆炭的有机碳矿化速率与时间呈乘幂关系(P0.05),300℃棉杆炭相比600℃棉杆炭的累积矿化量和累积矿化率分别提高了318%和87.06%;高温炭化抑制了有机碳矿化;与对照相比,添加300℃棉杆炭增加了土壤有机碳累积矿化量(0.1%处理除外,降低了7.22%),并随棉杆炭添加量而增加,土壤有机碳累积矿化量提高幅度在3.05%—35.28%,而添加600℃棉杆炭降低了土壤有机碳累积矿化量,降低幅度为6.11%—10.79%;3)培养前期(0—20 d)300℃棉杆炭对灰漠土土壤原有有机碳矿化为正激发效应(0.1%处理除外),后期为负激发效应,整个培养期内为负激发效应;600℃棉杆炭培养前期(0—5 d)对土壤原有有机碳激发效应微小,主要表现为负激发效应。由此可见,低温制备的棉杆炭能提高土壤有机碳矿化,而高温制备棉杆炭则抑制了土壤有机碳矿化,棉杆炭添加对土壤原有有机碳矿化具有负激发效应,能够促进土壤有机碳积累。
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| 关 键 词： | 棉杆炭 灰漠土 有机碳矿化 激发效应 |
| 收稿时间： | 2017/11/18 0:00:00 |
| 修稿时间： | 2018/10/2 0:00:00 |
Characteristics of cotton stalk-char and its effect on organic carbon mineralization in grey desert soil |
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| TANG Guangmu,XU Wanli,GU Meiying,YAO Hongyu,PU Shenghai and HU Kelin.Characteristics of cotton stalk-char and its effect on organic carbon mineralization in grey desert soil[J].Acta Ecologica Sinica,2019,39(5):1795-1803. |
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| Authors: | TANG Guangmu XU Wanli GU Meiying YAO Hongyu PU Shenghai and HU Kelin |
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| Institution: | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Science, Urumqi 830091, China,Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Science, Urumqi 830091, China,Institute of Microbiology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China,Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Science, Urumqi 830091, China,College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Science, Urumqi 830091, China and College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China |
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| Abstract: | |
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| Keywords: | cotton stalk-char grey desert soil organic carbon mineralization priming effect |
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