共查询到20条相似文献，搜索用时 453 毫秒
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采用新机制水保迈大步 总被引：2，自引：0，他引：2
李英明 《山西水土保持科技》2002,(1):1-4
进入新世纪，我省水土保持工作既面临着严峻的挑战，又面临着新的机遇。根据党中央，国务院关于水土保持生态建设的战略部署和省委，省政府的有关指示，全省水保部门要牢固树立“保护生态环境就是保护生产力，改善生态环境就是发展生产力”的观点，坚持“小开发，大保护”的治理方略，大力推行专业队治理，实行报账制资金管理，积极培植治理大户，推广普及先进实用技术，加强管护，提高综合治理效益，促进经济繁荣和社会进步。 相似文献
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袁浩基 《山西水土保持科技》2002,(1):5-8
精品小流域就是通过合理规划，精心施工和5年－10年的后期管护完善，使水土资源得到合理开发利用。水土流失得到有效控制，生态环境得到明显改善的小流域。精品小流域建设是全国生态环境建设形势的要求，是解决水土保持生态建设中存在问题的需要，是我省水土保持阶段性发展的必然。实践表明：实行专业队治理，突出流域主业，注重工程质量，推广先进科技是推进精品小流域建设的成功经验。目前精品小流域建设发展势头良好，但仍处在初期阶段，必须加强领导，认真规划，精心施工，落实管护，完善提高，才能全面提高其建设水平，加快全省水土保持生态建设步伐。 相似文献
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农村基层党员干部是直接为村民服务的农村基层工作者，是村民致富奔小康的领路人和带头人，认真做好新时期农村基层党员干部的廉洁自律工作，搞好农村基层党风廉政建设，对于改善党群、干群关系，维护党和政府在人民群众中的威信和形象，增强党的执政能力，提高党的执政地位，促进社会主义新农村建设具有十分重要的意义。党的十六届六中全会指出，党风正则干群和，干群和则社会稳。因此，如何加强农村基层党风廉政建设， 相似文献
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研究了硝酸磷肥中总氮量的测定，在测定过程中，在浓硫酸的存在下，硝酸根与过量尿素发生反应，过量尿素水解成铵根离子，加入一定量的中性甲醛，生成定量的酸，用碱标准溶液滴定，所得结果和国标法（真值）比较，相对误差在0．4％以内，具有较高的准确度和精密度。文章还对测定条件做了正交实验，选择了最佳实验条件，通过试验，说明了这种方法的可行性。 相似文献
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水土流失是我国目前面临的严重危机之一，所造成的危害不仅表现在水土资源破坏、生态环境退化等方面，而且已成为区域贫困的主要根源。应用统计分析等方法，研究证明了我国水土流失区与贫困人口的空间分布具有地理耦合性。二者相互影响，互为因果，生态的破坏导致了水土流失，水土流失又限制了对有限资源的有效利用，增加了环境的压力，成为生态恶化和贫困的根源，同时进一步的贫困又加速了水土流失和生态恶化。因此，全面推进水土保持，控制水土流失，可以实现水土资源的可持续利用，有效改善生态环境，增加农民收入，逐步从根本上减轻贫困。 相似文献
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Suyundukov Ya. T. Suyundukova M. B. Bezuglova O. S. Khabirov I. K. Khasanova R. F. Semenova I. N. Rafikova Yu. S. Ilbulova G. R. 《Eurasian Soil Science》2022,55(1):27-35
Eurasian Soil Science - The results of the study of the properties of urban soils of the city of Sibay located in the mining region of the Republic of Bashkortostan are presented. A specific... 相似文献
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Kholodov V. A. Farkhodov Y. R. Yaroslavtseva N. V. Ziganshina A. R. Maksimovich S. V. 《Eurasian Soil Science》2022,55(7):998-1004
Eurasian Soil Science - Layers were step-by-step removed from macroaggregates (2–1 mm in diameter) of Protocalcic Chernozems via successive abrasion in a revolving rotator during 5, 10, 15,... 相似文献
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《Communications in Soil Science and Plant Analysis》2012,43(15-16):1631-1646
Abstract Brazil has approximately 30 million hectares of lowland areas, known locally as “Varzea,”; distributed throughout the country. Soils in these areas have the potential to support agricultural production, but very little is known about their fertility. The current experiment was undertaken to characterize the chemical and physical properties of representative “Varzea”; soils collected at 0–20, 20–40, 40–60, and 60–80 cm depth intervals from 23 sites in Goias State of Brazil. Organic matter contents averaged 42 g/kg in the surface 20 cm of soil and should make a significant contribution to overall nutrient availability. Soil pH increased slightly with depth from a mean value of 5.2 in the surface 20 cm of soil to a mean value of 5.4 in the 60–80 cm depth interval. Several soils had exchangeable Al values ≥ 1.0 cmol Al/kg, but soil Al saturation was generally less than the 60% level frequently associated with Al toxicity. However, cereal and legume production could benefit from lime addition in many of these soils. Although base saturation was fairly low in some soils, exchangeable Ca and Mg levels were, in general, adequate throughout the profile. Extractable P levels were adequate in most surface soil samples. Extractable K levels in these soils were generally low, and the application of K fertilizers should be beneficial, especially in conjunction with lime addition. The high clay content “Varzea”; soils of the Brazilian lowlands have some drainage problems but generally exhibit favorable chemical properties for crop production when compared to soils of the well‐drained Cerrados. 相似文献
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Ye. V. Rogozhina N. V. Kostina L. S. Malyukova 《Moscow University Soil Science Bulletin》2011,66(1):32-35
An estimation of potential nitrogen-fixing activity of various soil types under agrophytocenoses of tea, filbert, peach, and
pawpaw which grow in the area of Greater Sochi is given. High indicators of nitrogen fixation activity in the soil in the
course of vegetation were characteristic of agrocenoses of pawpaw, peach, and filbert. The lowest level of nitrogen fixation
was noted in the soil of a tea plantation. A negative correlation dependence of potential nitrogen-fixing activity on the
acidity of the soil solution was established. A study of the seasonal dynamics of the activity of nitrogen fixation of soils
of agrocenoses of the subtropical zone of Russia made it possible to distinguish a less active winter and more active spring-summer-autumn
periods. 相似文献
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物联网是一个集信息通信、数据交换、传感器技术与软件工程于一体的综合性产业,探讨和分析了物联网的结构体系与发展中遇到的安全问题。 相似文献
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荔枝种子从果实中剥离出来后, 即使在室内条件下, 也极易失水干缩, 潮湿环境中又易发霉而腐烂。扫描电镜观察表明: 种皮上布满纹孔, 水分散失面积很大; 种脐部为疏松的海绵组织, 且营养丰富。据此, 生产上应对种子彻底清洗, 并保存于适当湿度的环境中, 以提高其发芽率。 相似文献
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The rate of popping of popcorn was measured in oil and in air. Kinetic data for lifetimes of individual kernels from a large population were obtained in oil at six constant temperatures (180–250°C) and also in an air‐popper at 202°C. The data are characterized by an induction period, which is, significantly, followed by a first‐order decrease in the number of unpopped kernels versus time. The activation energy for the first order process is 166.7 kJ/mol between 180 and 210°C, and 53.8 kJ/mol between 210 and 250°C. These data are consistent with a model that assumes 1) that the rate of heat transfer into a kernel follows Newton's law of cooling; 2) that in a sample of kernels there exists a distribution of critical pressures; 3) that for an individual kernel, the probability of popping is directly proportional to the difference between the internal aqueous vapor pressure and the kernel's critical pressure; and 4) that the measured rate constant at any temperature is an average overall of the kernels in the sample with critical pressures equal to or less than the internal aqueous vapor pressure. Minimum popping temperatures predicted by the model are 181 ± 2°C (oil) and 187 ± 2°C (air), in good agreement with previously reported direct measurements. 相似文献