期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
强度侵蚀区马尾松林不同改造模式的水土保持效应
1
作者 黄智军 刘训呈 +4 位作者 张颖 程浩 刘青青 侯晓龙 马祥庆 《南昌工程学院学报》 CAS 2016年第6期24-28,共5页
为筛选适合红壤强度侵蚀区马尾松林分改造模式,在福建长汀强度侵蚀初步治理区选择3种郁闭度的马尾松林为研究对象,建立马尾松林套种不同阔叶树种改造模式的径流小区,对不同郁闭条件下马尾松林套种改造模式林地的水、土、肥流失进行1 a... 为筛选适合红壤强度侵蚀区马尾松林分改造模式,在福建长汀强度侵蚀初步治理区选择3种郁闭度的马尾松林为研究对象,建立马尾松林套种不同阔叶树种改造模式的径流小区,对不同郁闭条件下马尾松林套种改造模式林地的水、土、肥流失进行1 a的定位观测,研究不同套种改造模式林地液体径流量、固体径流量和养分流失量的差异。结果表明,强度侵蚀区马尾松林套种不同阔叶树改造模式林地水土肥流失存在明显差异,不同林分郁闭度条件下的套种改造效果不同。在郁闭度0.2条件下林地水土流失表现为不套种模式>套种山杜英模式>套种乐昌含笑模式。在郁闭度0.4条件下林地水土流失表现为不套种模式>套种乐昌含笑模式>套种山杜英模式。在郁闭度0.6条件下套种山杜英模式是较理想的马尾松林改造模式。 展开更多
关键词 森林保护学 强度侵蚀区 马尾松林 套种改造 水土流失
下载PDF
南方红壤丘陵强度侵蚀区不同治理措施的土壤质量评价 被引量:5
2
作者 林敬兰 蒋芳市 +1 位作者 林金石 陈文祥 《亚热带水土保持》 2015年第4期11-15,68,共6页
本文以典型的南方红壤丘陵强度侵蚀区长汀县为研究对象,采用"空间代替时间"的方法,以未采取治理措施的强度侵蚀区和风水林为对照区,对实施老头松改造、草-灌-乔、等高草灌带、崩岗治理、草-牧-沼-果、乔灌混交、以草促林和植... 本文以典型的南方红壤丘陵强度侵蚀区长汀县为研究对象,采用"空间代替时间"的方法,以未采取治理措施的强度侵蚀区和风水林为对照区,对实施老头松改造、草-灌-乔、等高草灌带、崩岗治理、草-牧-沼-果、乔灌混交、以草促林和植灌促林等治理措施下的土壤质量进行研究。结果表明:严重土壤侵蚀区植被恢复后,土壤理化性质都有了一定程度的改善,土壤物理性质改善落后于养分状况特别是速效养分的改善;从土壤质量表征值来看,2000年后的治理措施QI值远低于2000年前的,且老头松改造、等高草灌带、草-灌-乔及崩岗治理措施的QI值差异不明显,2000年前的3个治理模式中,以草促林模式由于养分积累缓慢,土壤恢复较慢,不建议只采取种草措施,而应采取植灌促林、乔灌混交的措施。 展开更多
关键词 南方红壤丘陵 强度侵蚀区 治理措施 土壤质量
下载PDF
川中丘陵紫色泥岩极强度侵蚀区的防治措施与效益研究 被引量:1
3
作者 王艳 王建 王治国 《水土保持研究》 CSCD 1997年第1期138-140,144,共4页
川中丘陵区水土流失面积为7.71万km2,其中极强度流失面积占流失面积的32.4%,以遂宁市市中区为研究基点,对荒山和陡坡耕地极强度侵蚀区分别采取防治措施,研究其实用技术和改造治理后的综合效益。通过实测资料表明;水土保持作用... 川中丘陵区水土流失面积为7.71万km2,其中极强度流失面积占流失面积的32.4%,以遂宁市市中区为研究基点,对荒山和陡坡耕地极强度侵蚀区分别采取防治措施,研究其实用技术和改造治理后的综合效益。通过实测资料表明;水土保持作用、小气候变化和经济效益都很显著。 展开更多
关键词 紫色泥岩 强度侵蚀区 侵蚀 防治措施 效益
下载PDF
高强度侵蚀区水土流失的防治方法
4
作者 于蕴萍 《黑龙江水利科技》 2011年第6期210-211,共2页
黑龙江省穆棱市高强度侵蚀区的形成,给生态环境造成了很大危害,提出从坡面和沟道治理入手,综合治理,科学防治,合理配置各项水保措施和根治水土流失的方法。
关键词 水土流失 强度侵蚀区 形成特点 危害 防治方法
下载PDF
Soil Erosion and Its Basic Characteristics at Karst Rocky-desertified Land Consolidation Area: A Case Study at Muzhe Village of Xichou County in Southeast Yunnan, China 被引量:14
5
作者 YANG Zisheng YANG Longfei ZHANG Bosheng 《Journal of Mountain Science》 SCIE CSCD 2010年第1期55-72,共18页
Xichou County of Wenshan Zhuang and Miao Autonomous Prefecture in southeast Yunnan is one of the karst mountainous areas in southwest China showing typical rock desertification. During this study, we set up three soil... Xichou County of Wenshan Zhuang and Miao Autonomous Prefecture in southeast Yunnan is one of the karst mountainous areas in southwest China showing typical rock desertification. During this study, we set up three soil erosion contrast test spots at Muzhe Village, Benggu Township, Xichou County, which was the birthplace of the Xichou rock-desertified land consolidation mode. The three spots included the terrace land spot (already consolidated land), sloping land spot (unconsolidated sloping land under rock desertification), and standard runoff spot (bare land spot). In 2007, a whole-year complete observation was conducted during the rainy season and "rainfall-erosion" data were obtained for 32 times. Our analysis showed that during the entire observation period, the number of the rainfalls that led to soil erosion accounted for 34.04% of the number of all rainfalls and the amount of the rainfalls that led to soil erosion accounted for 84.17% of the total amount of all rainfalls. The average erosive rainfall standard in the three test spots was 11.0mm, slightly higher than the lO mm standard that has been adopted all over China, but lower than the 12.7 mm standard of the US and the 13.0 mm standard of Japan. According to single-factor analysis, the soil loss in the sloping land spot (L2) and that in the bare land spot (L3) are correlated to certain extent to manyother factors, including the single precipitation (P), rainfall intensity during the maximum ten minutes (Lo), rainfall intensity during the maximum 20 minutes (I2o), rainfall intensity during the maximum 30 minutes (I30), rainfall intensity during the maximum 40 minutes (I4o), and rainfall intensity during the maximum 6o minutes (I60). Among these factors, they are of the highest relativity with I6o. According to double-factor analysis, both L2 and L3 are of good relativity with P and I60. According to multi-factor analysis, L2 and L3 are also of good relativity with seven rainfall indexes, namely, P, Ia (average rainfall intensity), L10, 120, I30, 140, and I60, with their related coefficient R reaching 0.906 and 0.914, respectively. The annual soil losses in the three test spots are widely different: 1030.70 t/km2.a in the terrace land spot, which indicates a low-level erosion; 12913.22 t/km2.a in the sloping land spot (unconsolidated spot), some 12.5 times than that in the terrace land spot, which indicates an ultra-high-level erosion; and 19511.67 t/km2-a in the bare land spot, some 18.9 times than that in terrace land spot, indicating an acute erosion. These figures fully show that the Xichou rock-desertified land consolidation mode plays a significant role in soil conservation. 展开更多
关键词 karst mountainous area rockdesertification land consolidation soil erosion testspot Xichou County
下载PDF
Spatial and temporal change patterns of freeze-thaw erosion in the three-river source region under the stress of climate warming 被引量:5
6
作者 GUO Bing LUO Wei +1 位作者 WANG Dong-liang JIANG Lin 《Journal of Mountain Science》 SCIE CSCD 2017年第6期1086-1099,共14页
The three-river source region(TRSR), located in the Qinghai-Tibet Plateau in China, suffers from serious freeze-thaw(FT) erosion in China. Considering the unique eco-environment and the driving factors of the FT proce... The three-river source region(TRSR), located in the Qinghai-Tibet Plateau in China, suffers from serious freeze-thaw(FT) erosion in China. Considering the unique eco-environment and the driving factors of the FT process in the TRSR, we introduce the driving force factors of FT erosion(rainfall erosivity and wind field intensity during FT period) and precipitation during the FT period(indicating the phase-changed water content). The objective was to establish an improved evaluation method of FT erosion in the TRSR. The method has good applicability in the study region with an overall precision of 92%. The spatial and temporal changes of FT erosion from 2000 to 2015 are analyzed. Results show that FT erosion is widely distributed in the TRSR, with slight and mild erosion being the most widely distributed, followed by moderate erosion. Among the three sub-regions, the source region of the Yellow River has the slightest erosion intensity, whereas the erosion intensity of the source region of Yangtze River is the most severe. A slight improvement can be observed in the condition of FTerosion over the whole study region from 2000 to 2015. Vegetation coverage is the dominant factor affecting the intensity of FT erosion in the zones with sparse vegetation or bare land, whereas the climate factors play an important role in high vegetation coverage area. Slopes>28° also have a significant effect on the intensity of FT erosion in the zones. The results can provide a scientific basis for the prevention and management of the soil FT erosion in the TRSR. 展开更多
关键词 Freeze-thaw erosion Vegetation Precipitation Three-river source region Global warming
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部