Results 51 to 60 of about 361 (96)
Shuitu Baochi Xuebao, 2021 为探明紫色土坡耕地不同绿肥覆盖对柑橘园径流和养分流失的阻控效应，在田间径流小区设置黑麦草（Lolium perenne L.）、光叶苕子（Vicia villosa Roth var.）、二月兰（Orychophragmus violaceus）和清耕对照4个处理，定量监测了在自然降雨条件下不同处理的径流及氮磷养分流失量。结果表明，与清耕对照相比，周年内绿肥覆盖可显著降低8.7%~27.0%的地表径流量、30.1%~50.6%总氮流失量和32.4%~62.9%总磷流失量 ...
刘瑞 +7 more
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Shuitu Baochi Xuebao, 2016 为揭示雨强对喀斯特坡耕地养分流失的影响，运用可调坡度、地下孔（裂）隙度试验钢槽装填土石模拟喀斯特裸露坡耕地，采用人工模拟降雨的方法研究不同雨强下喀斯特裸坡径流养分流失特征。结果表明：（1）雨强为15，30 mm/h时地表不产流，雨强50 mm/h时地表有产流；试验雨强下地下孔（裂）隙均有径流产生。（2）地表径流中全氮和全钾流失量均随雨强增大而增大，全磷流失量则先增大后减小；地下径流中全氮流失量随雨强增大呈先增大后减小趋势，全钾流失量与雨强正相关，全磷流失量与雨强关系不明显。（3）雨强为30，50 mm ...
靳 丽 +4 more
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Effects of Different Logging Residue Treatments on Acid Hydrolyzed Soil Organic Carbon Fractions and Soil Microbial Communities in a Chinese Fir Plantation [PDF]
[Objective] Acid hydrolyzed soil organic carbon fractions are important in soil, and the changes of their contents will affect soil microbial community composition.
GUO Jianfen +5 more
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Shuitu Baochi Xuebao, 2007 坡度是土壤养分流失的重要因素,通过室内人工降雨模拟试验,研究不同坡度土壤侵蚀和养分流失的过程与机制。研究结果表明:土壤中养分的流失量随坡度的增大而增大,但在20°附近时存在转折点,25°时养分流失量反而减小。同时利用两种类型描述径流养分浓度模型对实测资料进行分析,结果显示与指数函数模型相比较,采用幂函数模型能够较好地模拟黄土坡面非饱和条件下径流溶质浓度变化过程,同时幂函数模型也能够较好地描述径流中钾离子和溴离子的质量变化过程,为进一步完善黄土坡面径流养分迁移模拟模型提供了参考。
孔刚, 王全九, 樊军
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Strategies of high efficiency water usage promoted by microbial remediation in coal mining areas of western China [PDF]
The fragile ecological environment in the western coal mining areas of China, compounded by intensive mining activities, has led to water and soil erosion, soil degradation, and damaged root systems.
Chao WU +4 more
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Shuitu Baochi Xuebao, 2002 针对红壤丘岗区自然条件和地形特点,在岗地上坡布置了4组人工林恢复实验,研究在植被恢复过程中林地土壤水分养分流失动态。12年研究结果表明:不同林地水分和养分径流损失随植被生长而减少,渗漏损失则随植被生长而增加;水分、养分径流损失量依次为自然草被>马尾松林>针阔混交林>阔叶林,渗漏损失量则相反。
何园球 胡锋 等
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Study on the effect of layered structure of overlying strata on soil damage in mining areas in the loess covered region of northern Shaanxi [PDF]
Ecological protection in coal mining areas is a major problem that needs to be solved urgently for high-quality development in the Yellow River Basin. Scientific understanding of the response law of the overlying strata of the coal seam to the surface ...
Jiangbo WEI +7 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
core +1 more source
Shuitu Baochi Xuebao, 2018 为改善江汉平原地区稻田水肥管理措施，采用田间小区试验，研究了常规淹灌（CF）和浅灌深蓄（SIDS）条件下，农民习惯施肥（FFP）、30%尿素+70%控释参混肥（30%N+70%CRF）和优化减氮施肥（OPT-N）对水稻各生育阶段稻田氮磷流失特征、养分吸收和土壤养分积累的影响。结果表明：与CF处理相比，SIDS处理田间灌溉水量、总用水量、径流量和渗漏量分别降低41.7%，18.5%，45.8%和21.9%，降雨利用率增加16.2%，TN和TP径流流失量分别降低32.6%～35.9%和36.4%～53.1%，
晏, 吴启侠, 朱建强, 张露萍
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Shuitu Baochi Xuebao, 2021 准确评估区域土壤侵蚀和养分流失空间分布特征，是开展区域水土保持规划和生态治理的基础。基于GIS空间分析技术和RUSLE模型，对云南省土壤侵蚀和养分流失特征进行定量化分析。结果表明：云南省土壤侵蚀面积为1 835.91×104 hm2，占总面积的48.07%，平均侵蚀模数为15.65 t/（hm2·a），土壤侵蚀以微度侵蚀、轻度侵蚀为主，但极强烈侵蚀、剧烈侵蚀是区域侵蚀产沙的主要来源。滇西南区土壤侵蚀强度较大，而滇西北区土壤侵蚀强度较小。区域土壤侵蚀主要发生在夏季，旱地是区域侵蚀产沙的主要策源地 ...
陈正发 +5 more
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