Results 21 to 30 of about 446 (142)
Relationship Between Land Use Carbon Balance and Human Activity Intensity in Tuojiang River Basin [PDF]
, 2023 [Objective] The synergistic relationship between land use carbon balance and human activity intensity were studied in order to provide a reference for regional collaborative carbon emission reduction planning in the Tuojiang River basin, and thereby meet
Gao Xuesong, Wang Qi, Zhang Wenying
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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
doaj
地表面被覆と勾配が裸地および林地斜面の表面流出発生に与える影響 [PDF]
, 2018 筑波大学University of Tsukuba博士（理学）Doctor of Philosophy in Science2018【要旨 ...
KOMATSU, Yoshitaka, 小松, 義隆
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Effects of Grazing Intensity on Features of Vegetation, Soil and Its Erosion in a Steppe Desert [PDF]
, 2022 [Objective] The effects of different grazing intensity on vegetation features, soil physical properties, and soil erosion in a steppe desert were determined in order to provide a scientific basis for soil erosion control, degradation and ecosystem ...
Guo Jianying, Yang Yanan, Yang Zhenqi
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Shuitu Baochi Xuebao, 1993 在福建省连城县紫色土分布区设立临时标准地，研究了毛竹林，杂木林，马尾松林，黑荆－马尾松林等不同林型紫色土的酶活性和土壤肥力，结果表明：不同林型紫色土的酶活性，土壤呼吸作用强度均比光板地高，土壤养分状况亦比光板地好，尤其是集约经营的毛竹林，土壤肥力较高，结构性和抗蚀性也较好，从而对紫色土壤肥力的保持起到良好作用。Ｑ型群体分析表明，毛竹林土壤肥力较高，马尾松林，杂木林土壤肥力中等，黑荆－马尾松林 ...
杨玉盛 李振问
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Effects of Desert Land Cultivation on Soil Aggregate Stability and Carbon Fixation [PDF]
, 2023 [Objective] The response of soil aggregate stability and organic carbon before and after land reclamation using different land use types were analyzed in order to provide a scientific theoretical basis for wasteland reclamation, vegetation restoration ...
Chen Xue +4 more
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, 2000 本文对贵州省六个主要土类有代表性的典型土壤６８个剖面，２０４个土样中的稀土元素含量及分布进行研究，结果表明：贵州省典型土壤中稀土元素总量（２６４．４４μｇ／ｇ）高于全国土壤平均含量（１９５．７μｇ／ｇ）；各土类稀土元素的丰度都遵守Ｏｄｄｏ－Ｈａｒｋｉｎｓ法则，Ｃｅ元素富集明显。贵州典型土壤中轻稀土元素含量（１９９．０１μｇ／ｇ）亦高于全国土壤，属典型的轻稀土土壤类型；石灰土中稀土各元素含量大于其它土类 ...
严重玲 +3 more
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Landscape Ecological Risk Assessment of Ya’an-Kangding Expressway Based on PLUS Model [PDF]
, 2023 [Objective] The regional landscape ecological risks were evaluated, and their spatiotemporal variation was analyzed in order to provide important support for reducing regional ecological risks, maintaining regional ecological security, and promoting ...
Li Xu, Liu Jingjing, Peng Peihao
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生态治理技术适宜性评价影响因素及概念模型——以沙漠化治理技术为例 [PDF]
, 2020 生态系统退化已是全球的主要环境问题,旨在恢复和重建生态系统的生态治理技术受到重视。在众多直接、间接的技术中,如何遴选最适宜的技术,目前仍缺乏系统、科学、完善的评价方法。根据对其他领域中有关技术评价理论、方法、要素等的梳理,以沙漠化治理技术涉及的多个影响因素为例,首次提出一般性生态治理技术适宜性评价概念模型——"双圈十二维"模型,包括两类十二个维度:(1)内生因素(内圈):限制性、独立性、经济性、可操作性;(2)外部因素(外圈):目标、地域、时效、政治政策制度 ...
姜志德, 宁宝英, 马建霞
core
Effects of Different Mulching Measures on Distribution of Organic Carbon and Inorganic Carbon in Soil Aggregates Under Spring Maize Cultivation [PDF]
, 2023 [Objective] The effects of different mulching methods on the distribution of organic and inorganic carbon in soil aggregates on the Loess Plateau, and the mechanism under which soil aggregates sequester carbon under mulched conditions were determined in ...
Li Meng +8 more
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