Results 31 to 40 of about 1,092 (115)
Shuitu Baochi Xuebao, 2000 通过对三峡库区迎江坡面５种已持续经营１５年以上的代表性农林复合结构类型的土壤养分状况的监测，研究不同农林复合结构对土壤养分分布的影响。从坡项至坡脚，农林复合结构类型分别为：坡耕地－经济林－林地、林地－经济林－坡耕地、经济林－坡耕地－林地、林地－坡耕地－经济林、林地－经济林－梯地。测定了土壤全Ｎ、全Ｐ、全Ｋ、水解Ｎ、速效Ｐ和有机质，通过分析得出：林地－经济林－梯地、经济林－坡耕地 ...
黄闰泉 刘贵开
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Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates [PDF]
[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can ...
HAN Guangzhong +4 more
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Dynamic Monitoring of Soil and Water Loss at Wuding River Basin, a Typical Tributary of Middle Reaches of Yellow River [PDF]
, 2022 [Objective] The distribution and dynamic characteristics of soil and water loss at Wuding River, a typical coarse sediment tributary in the middle reaches of the Yellow River, were analyzed in order to provide a scientific basis for soil and water ...
Zhang Dong, Zhao Hui, Zhao Yuan
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Shuitu Baochi Xuebao, 2022 东北黑土坡耕地受土壤侵蚀和习惯顺坡耕作措施的影响,水土流失严重,土壤有机碳含量呈逐年下降趋势。针对东北黑土坡耕地不同垄作措施水土流失及土壤有机碳变化特征不明确的问题,采用田间定位试验的方法,探究了顺坡垄作和横坡垄作对坡耕地水土流失及土壤有机碳变化的影响。结果表明:(1)横坡垄作相对于顺坡垄作能显著减少径流总量97.1%,减少泥沙总量93.1%,表现出较强的拦截地表径流和泥沙的作用。(2)横坡垄作对比顺坡垄作可减少99.9%的SOC及99.3%的DOC流出耕地,坡肩和坡背是拦截迁移土壤有机碳的主要坡位 ...
盖浩 +5 more
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Benefit Evaluation of Different Allocation Modes of Soil and Water Conservation Measures in Ta-pieh Mountains Area [PDF]
[Objective] In order to reveal the effect of different soil and water conservation measures on reducing runoff and sediment in Ta-pieh Mountains, optimize the allocation mode of soil and water conservation measures in Ta-pieh Mountains.
JIA Tinghui +4 more
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Shuitu Baochi Xuebao, 2018 在坡耕地上，农业耕作措施改变了地表微地形，对坡地土壤侵蚀过程产生影响。深入了解耕作措施对坡地土壤侵蚀的影响，以便为开展陡坡耕地退耕还林（草）工程的水土保持效益评价提供科学依据。以30°陡坡耕地为研究对象，采用室内人工模拟降雨试验方法，对采用人工锄耕、人工掏挖和等高耕作的裸坡地土壤侵蚀特征进行研究。用相同坡度平整坡地作为对照措施。降雨强度为60，90，120 mm/h，降雨历时80 min。结果表明：（1）在陡坡耕地上，在雨强为60，90 mm/h时，3种耕作措施都具有延缓坡地产流的作用，但在雨强为120
赵龙山, 侯
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Evaluation and Prediction of Cultivated Land Fragmentation Based on Landscape Pattern Index in Jizhou District of Tianjin City [PDF]
, 2022 [Objective] The effects of cultivated land fragmentation was evaluated and predicted in order to provide a useful reference to address the problem of cultivated land fragmentation in the Jizhou District of Tianjin City. [Methods] The temporal and spatial
Ma Jie, Xu Song, Zhang Ge
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Shuitu Baochi Xuebao, 2002 贵州山区的旱耕地以旱坡地为主,全省有旱耕地3 487 000 hm2,占全省土地总面积的19.80%.其中≤2°的旱坡耕地仅占旱耕地的3.94%,2°～6°占旱耕地的8.12%,6°～15°占旱耕地的28.04%,15°～25°占旱耕地的35.11%,>25°的陡坡地占旱耕地的24.79%,>35°的极陡坡耕地占旱耕地的7.29%.全省的旱坡地多集中在西部地区.研究表明贵州山区的土地旱化率,不仅反映该地区的垦殖状况,还可以作为该地区生态环境、水土流失状况评价的重要指标.
林昌虎 张西蒙 张鹤林
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Spatial Distribution Characteristics of Soil Water and Salt in Newly Cultivated Farmland Under Gully Control in Loess Hilly Region [PDF]
, 2023 [Objective] Part of the newly cultivated farmland formed by the “Gully Control and Land Reclamation” project is facing the risk of soil salinization in the loess hilly region.
Jiao Feng +3 more
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Shuitu Baochi Xuebao, 2020 紫色土坡耕地是我国西南地区重要的耕地类型，为了探讨土壤管理措施对紫色土坡耕地侵蚀耕层质量的影响，以紫色土坡耕地耕层土壤为研究对象，采用铲土侵蚀模拟试验小区，建立不同侵蚀程度（侵蚀年限）的坡耕地定位试验，以不施肥为对照（CK），设置了化肥管理措施（F）、生物炭+化肥管理措施（B+F），对比分析土壤管理措施对土壤理化性质及力学性能影响，采用土壤质量指数法分析紫色土坡耕地侵蚀耕层质量变化特征。对3种土壤管理条件下坡耕地耕层质量及恢复作用进行评价。结果表明：（1 ...
叶青 +5 more
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