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欧阳力 《水土保持应用技术》2016,(2):38-40
以"黑龙江省桦南县双鸭子小流域水土保持监测"为例,探讨了小流域监测的内容,监测时段和监测原则,方法等。实施水土保持监测,不断探索区域水土流失特征与发展规律,积累监测运行及管理经验,及时掌握项目区水土流失形势并提出调控策略,为实施水土保持生态建设、管理、科研、规划设计、提高水土流失治理水平,改善和恢复生态环境提供有力支撑。 相似文献
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《山西水土保持科技》2017,(1)
方山县既是国家级贫困县,又是黄河中游水土保持重点县,全县总面积1 434.1 km~2,其中水土流失面积占到62.6%。在县委、县政府"生态立县"战略思路指导下,长期坚持以小流域为单元的水土流失治理,水土保持生态建设取得了显著成就,至2015年底,全县累计治理水土流失面积576.0 km~2,治理度达到64.2%。介绍了水土保持发展历程、治理成效与主要经验。 相似文献
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天水市水土保持生态建设成效显著 总被引：1，自引：0，他引：1
正"十二五"以来,甘肃省天水市先后启动实施了中央预算内小流域综合治理、坡耕地水土流失综合整治、国家农业综合开发等水土保持重点项目,总投资26 613.81万元,治理水土流失面积1 428.01 km2,兴修水平梯田101 233.33 hm2。在全市水土保持生态建设中,以治理促开发,以开发保治理,形成了以小流域为单元,以梯田建设为重 相似文献
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安定区水土保持生态建设管理机制的建立 总被引：1，自引：0，他引：1
自1983年以来,安定区有146条小流域被列入国家水土保持生态建设工程,得到了初步和阶段性治理,水土流失治理程度达到了68.2%,生态环境明显好转,人居条件明显改善,人民生活水平显著提高。实践并形成了组织协调、群众参与、建设管理、大户扶持、生态补偿、产业开发联动、科研生产结合且较为行之有效的水土保持生态建设管理机制。 相似文献
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黄彬 《水土保持应用技术》2010,(3):40-41
水土流失是山区贫困的主要根源,小流域治理是农民脱贫致富的有效途径。在水土保持生态建设中,积极探索出了"回龙道路"、"大慈样板"和"郭家模式"等治理水土流失典型模式,效益显著。建议用科学发展观指导小流域治理和促农致富工作,进一步加大水土保持宣传力度,理清工作思路,依靠科技进步,加大投资力度。 相似文献
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水资源是制约内蒙古生态建设和经济社会发展的重要因素。在分析内蒙古自然条件、水土流失及治理情况后 ,探讨了小流域综合治理与降水资源利用的关系 ,提出通过水土保持工程措施 ,科学合理地进行小流域综合治理 ,可提高降水资源的利用率 ,明显增加可利用水资源 相似文献
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平原地区河道堤防滩地的水土流失,直接淤积河床,影响行洪安全。堤防滩地的水土流失是自然因素和人为因素共同作用的结果,以新修堤防的水土流失最为严重,对其防治须实行工程措施、植物措施和人为预防相结合。 相似文献
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重庆地处长江上游、三峡库区,由于三峡库区水土流失严重、生态环境脆弱、自然灾害频繁,且三峡库区的水土保持和生态建设事关全市经济社会发展全局、事关三峡工程建成后的安全运行和库区的长治久安,因此是我市水土保持生态建设的重点。虽然,“长治”工程的有效实施,使我市的水土保持生态建设取得了较大的成绩,但离全面建设小康社会的要求尚有不少的差距,因此,我们要紧紧抓住国家实施可持续发展战略和西部大开发战略的历史机遇,进一步增强紧迫感、责任感和使命感,调动全社会各界力量,防治水土流失,改善生态环境,建设巴渝秀美山川。 相似文献
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论水土、水土生态与水土生态保持 总被引：4，自引：7，他引：4
在论述水土在陆地生态系统中的地位和作用的基础上,提出了水土生态的概念,认为植被与水土不可分割的整体观念是水土生态的重要特征。同时,对水土生态保持的含义作了新的定义,并将水土生态保持划分为四大类型,即生态型、自然型、生产型、建设型。从水土生态的高度,从源头上、要素的联系中去认识和防治水土流失,是一种主动的、有机的、整体的水土保持观念,是水土保持认识观的深化和发展,将使水土生态保持事业进入一个崭新的时代。 相似文献
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The charge characteristics of A1 or Ap and B2 horizon samples of total 23 Ultisols, Alfisols and Oxisols in Korea and Thailand were studied by measuring the retention of NH4+ and NO3? at different pH values (4–8) and NH4NO3 concentrations (0.1–0.005 m ). The magnitude of their negative charge (σ?; meq/100g) was dependent on pH and NH4NO3 concentration (C; m ) as represented by a regression equation: log σ?=apH +blogC +c. The values of the coefficient a (0.04–0.226), b (0.03–0.264) and c (–0.676–1.262) were correlated with the kinds of the soil and horizon and with the region where the soil exists. The retention of NO3? was less than 1 and 2–3 meq/100 g for the A1 or Ap and B2 horizon samples, respectively. The sum of exchangeable base and Al (‘effective’ CEC) was close to and higher than the magnitude of permanent charge (=σ? measured at pH = 4.3 and at C = 0.005 m ) for one-third and two-thirds of samples, respectively. A σ? value of 16 meq/100 g clay at pH = 7 and C = 0.01 m was found appropriate to separate the B2 horizons of Thai Ultisols and Oxisols from those of Korean Ultisols and Alfisols. Korean Alfisols and Ultisols and Thai Ultisols were distinguished from each other on the status of exchangeable base and Al 相似文献
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水土保持法律规范和相关行政法律规范,共同构成了水土保持监督管理法律体系,其内容庞杂,相互交叉、融合,程序复杂。通过一组网络图及其简要注释,直观地表述了水土保持监督管理工作的相关程序、时效、逻辑关系和法律依据;通过对网络图呈现的逻辑问题所反映出的法律缺陷进行分析,提出应当按照立法法的有关规定,对现行法律特别是水土保持法律法规进行必要的修改,以适应不断发展的水土保持监督管理工作需要的建议。 相似文献
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简析了婺源县城镇开发区建设过程中造成水土流失的状况、危害、原因后,提出了其防治措施,并阐明开展城市（镇）水土保持的紧迫性。 相似文献
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我国滑坡、崩塌的区域特征、成因分析及其防御 总被引：2，自引：0，他引：2
论述了我国滑坡、崩塌的区域分布特征,滑坡和崩塌的危害程度,滑坡和崩塌类型和成因分析,并且提出了灾害的防御措施,以期达到环境保护成为社会发展过程中的一个重要组成部分。 相似文献
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Soils were collected from 2-year (2-y) and 3-year (3-y) old red-pine seedling plots in two tree nurseries, Hayward in the north and Wilson in the southwestern part of Wisconsin State respectively, and equilibrated with 0.01 M Ca(NO3)2 for soil solution Zn and Mn (solu-Zn and Mn), and with 0.01 M Ca(NO3)2+0.005 M EDTA for soil adsorbed Zn and Mn (ad-Zn and Mn). Buffering capacity of soil Zn and Mn (b-Zn and Mn) was obtained from the ratio of ad-Zn and Mn to the solu-Zn and Mn. The concerned traces in pine seedling needles (ndls), stems(sts) and roots (rts) were simultaneously measured. 相似文献
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C. G. Sherrell 《Journal of plant nutrition》2013,36(9):801-816
Abstract Lucerne (Medicago sativa L.) and phalaris (Phalaris aquatica L.) were grown separately and together in a pot trial on a yellow‐brown pumice soil with three rates of sodium (Na) and two rates of potassium (K) in factorial combination. Lucerne alone had a low Na concentration but growing phalaris as a companion grass produced herbage with a Na concentration adequate for stock. Na application increased the Na concentration in phalaris and the mixture of phalaris and lucerne much more than in lucerne alone; had little effect on K concentration; slightly reduced Mg concentration; and greatly reduced Ca concentration but not as much in lucerne as in phalaris or the mixture with lucerne. K application increased K concentration and reduced Na, Ca and Mg concentrations throughout. Yield of phalaris grown alone and in combination with lucerne was increased significantly by Na application when K concentration in the plants was low. Yield of lucerne was not affected by Na application and it is concluded that Na did not substitute for K in this species. It is concluded that field trials are warranted to investigate the possibility of growing a special purpose mixture of lucerne and phalaris on New Zealand yellow‐brown pumice soils to provide feed that has adequate Na for grazing animals. 相似文献