| 添加水稻秸秆对不同类型土壤团聚体分布和稳定性的影响 |
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| 引用本文： | 刘哲,韩霁昌,陈茜,余正洪,张卫华,高红贝.添加水稻秸秆对不同类型土壤团聚体分布和稳定性的影响[J].水土保持研究,2017(6). |
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| 作者姓名： | 刘哲 韩霁昌 陈茜 余正洪 张卫华 高红贝 |
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| 作者单位： | 1. 陕西省土地工程建设集团有限责任公司,西安710075;国土资源部退化及未利用土地整治工程重点实验室,西安710075;2. 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 资助项目:国家科技支撑计划课题(2014BAL01B01)，国土资源部公益性行业科研专项项目(201411008-3)，陕西省重点科技创新团队计划项目(2016KCT-23) |
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| 摘 要： | 以不同类型土壤(红壤、潮土、砂姜黑土)为研究对象,通过室内模拟试验,研究水稻秸秆添加对3种类型土壤水稳性团聚体分布及稳定性的影响。培养温度为28℃,培养时间为120d。研究结果表明:未添加水稻秸秆的3种类型土壤(对照组),微团聚体(250μm)占主体,2 000μm粒级水稳性团聚体含量最少。与对照相比,添加水稻秸秆后促使2 000μm粒级水稳性团聚体显著增加(p0.05),大团聚体(250μm)占主体。红壤、潮土、砂姜黑土试验组250μm水稳性团聚体比对照组增加的比例分别为35.6%,41.1%,22.0%,潮土的增加比例最为明显。3种类型土壤水稳性团聚体的平均重量直径(MWD),几何平均直径(GMD)显著增加(p0.05),分形维数(D)值、土壤不稳定团粒指数(ELT)显著减少,土壤结构和抗侵蚀能力明显得到改善,潮土的稳定性指标变化最为明显,团聚体结构改善效果最好。3种类型土壤0.25mm(R0.25)水稳性团聚体含量与GMD,MWD间呈极显著正相关关系(p0.001)。
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| 关 键 词： | 水稳性团聚体 土壤类型 团聚体稳定性 水稻秸秆 |
Effects of Application of Rice Straw on Distribution and Stability of Aggregates in Different Soil Types |
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| LIU Zhe,HAN Jichang,CHEN Qian,YU Zhenghong,ZHANG Weihua,GAO Hongbei.Effects of Application of Rice Straw on Distribution and Stability of Aggregates in Different Soil Types[J].Research of Soil and Water Conservation,2017(6). |
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| Authors: | LIU Zhe HAN Jichang CHEN Qian YU Zhenghong ZHANG Weihua GAO Hongbei |
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| Abstract: | An indoor incubation experiment of red soil,aquatic soil and mortar black soil under incubation at 28℃C for 120 days was conducted to study effects of application of rice straw on distribution and stability of water-stable aggregates in three soil types.The results showed that the contents of microaggregates(＜250 μm) in three soil types with no-application of rice straw were most and the contents of ＞2 000μm macroaggregates were the least,compared with the control,＞2 000 μm waterstable aggregates significantly increased under the application of rice straw (p＜0.05),while the macroaggregates (＞250 μm) became the most,the macroaggregates (＞250 μm) of red soil,aquatic soil and mortar black soil increased by 35.6％,41.1％ and 22.0％,respectively,compared with the control,the increasing proportion of aquatic soil was the most.At the same time,the mean weight diameter (MWD) and geometric mean diameter (GMD) of water-table aggregates significantly increased (p＜0.05),the value of fractal dimension (D) and unstable aggregate index (ELT) were lower than the control,the structure and erosion resistance of three soil types were obviously improved,while the improvement effects of stability index and aggregate structure of the aquatic soil were the best.The macroaggregates (＞250 μm) and GMD,MWD had the significant positive correlation (p＜0.001). |
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| Keywords: | water-stable aggregates soil type aggregate stability rice straw |
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