Results 21 to 30 of about 701 (96)
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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Effects of Climate Change and Human Activities on Vegetation Coverage in Arsenic Sandstone Area of Yellow River Basin [PDF]
, 2023 [Objective] The arsenic sandstone area is the most serious soil erosion area in the Yellow River basin. Vegetation coverage changes and their driving factors were determined in order to provide a scientific reference for vegetation restoration and ...
An Li +5 more
core +1 more source
Shuitu Baochi Xuebao, 2003 经多次与市县两级水电局和林业局同志及退耕户进行座谈, 并对退耕还林试点工程现场进行 实地考察,了解该县金沙江流域水土流失情况和退耕还林试点工程的实施现状,对退耕还林试点工程实施过程中存在的诸多问题提出了参考建议,供有关部门决策时参考.
李维一 +4 more
doaj +2 more sources
Shuitu Baochi Xuebao, 2023 退耕还林工程是黄土高原控制水土流失的主要措施之一,探讨退耕还林对土壤团聚体稳定性与土壤可蚀性的影响,可为黄土高原地区生态恢复和水土保持效益评价提供科学依据。以农田为对照,选取不同退耕年限(5,10,15,20,25,30年)刺槐林为研究对象,研究退耕还林后0—30 cm土层土壤团聚体稳定性和土壤可蚀性动态变化,并探讨土壤可蚀性与土壤团聚体稳定性之间的关系。结果表明:(1)＞0.25 mm水稳性团聚体含量、平均重量直径、几何平均直径随着退耕年限增加呈递增趋势,三者相比退耕前(农田)分别增加32%~79 ...
范家伟 +3 more
doaj
Spatiotemporal Evolution and Simulation of Future Landscape Patterns in Zhangjiajie City [PDF]
, 2022 [Objective] The evolution characteristics of land use and landscape patterns from 2000 to 2020 and 2030 at Zhangjiajie City, Hu'nan Province were analyzed in order to propose an optimization strategy for future development of Zhangjiajie City, and to ...
Li Yuefeng +3 more
core +1 more source
Shuitu Baochi Xuebao, 2001 目前我国西部地区大力开展改善生态环境的退耕还林还草工程。岷江属于长江上游重要的支流之一 ,其水保工作将对整个长江流域的生态环境建设直接产生影响。退耕还林还草的科学问题在于水土保持 ,利用 RS和GIS数据以及通用水土流失模型对岷江上游进行侵蚀强度分级和填图、坡耕地的提取 ,最后统计分析坡耕地和侵蚀强度间的关系 ,确定区域内退耕还林还草的标准 ,并且对退耕还林还草后生态环境的变化和水土流失量进行了初步预测方法。
马超飞 马建文 等
doaj +2 more sources
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
core +1 more source
Shuitu Baochi Xuebao, 2011 采用野外调查和室内分析相结合的方法,对退耕还茶地和退耕还林地土壤水稳性团聚体及其有机碳分布特征进行研究。结果表明:(1)不同土层退耕还茶地土壤各粒径水稳性团聚体占总团聚体的比例均以5mm这2个粒级外,退耕还茶地土壤有机碳含量较退耕还林的低。
何淑勤, 郑子成, 宫渊波
doaj
Spatiotemporal Characteristics and Driver Detection of Landscape Pattern and Ecological Risk in Huangshui River Basin [PDF]
, 2023 [Objective] The characteristics and driving factors of landscape pattern changes and the spatiotemporal evolution of landscape ecological risk was analyzed in order to provide a theoretical basis for integrated watershed management, watershed ecosystem ...
Li Runjie +3 more
core +1 more source
Shuitu Baochi Xuebao, 2005 通过黄土高原地区农户和基层干部的问卷、随访调查，对退耕还林(草)政策的持续性进行了初步评价。初步结论为：目前的退耕还林(草)政策虽有部分地方尚需修改和完善。但总体而言，退耕还林(草)政策已在黄土高原地区产生了较为深远的影响力，奠定了坚实的民意基础；同时，退耕还林(草)政策具有以往的生态环境建设措施无法比拟的优越性和强有力的保障体系。随着政策的不断改进和完善，必将有效促进和保障退耕还林(草)工作的持续、深入开展。
董世魁 康慕谊 熊敏 刘晓骢
doaj +2 more sources