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施用废渣后土壤硅素释放特性及其影响因子的研究Ⅱ土壤硅素释放特性及其与pH的关系 总被引：4，自引：1，他引：3
选取5种工矿废渣进行室内模拟试验,研究不同种类工矿废渣作为硅肥施用对土壤硅素释放特性及pH的影响。结果表明:y=kxm方程可以很好地描述土壤硅素释放的动力学特征;施用废渣可显著提高水田土壤硅素释放速率,增加土壤硅素释放量,提高土壤溶液的pH值,土壤溶液pH与培养127天硅素累积释放量间呈极显著直线正相关关系;三种高炉渣(A、B、F)的施用效果明显好于粉煤灰(H)和金刚石矿渣(J),即三种高炉渣更适于作为生产硅肥的原料。 相似文献
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三峡库区"移土培肥"工程的水土流失问题浅析 总被引：3，自引：0，他引：3
三峡库区"移土培肥"工程在我国是一项全新的工程项目,对库区发展和耕地保护事业的开拓具有重要意义.介绍三峡库区"移土培肥"工程的背景和基本概况,详细论述工程的实施情况,并在此基础上对三峡库区"移土培肥"工程实施过程中可能产生的水土流失问题进行分析并提出相应的对策,对于防止三峡库区"移土培肥"工程的水土流失具有重要的参考价值和指导意义. 相似文献
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M. Brzezi&#x;ska Z. Soko&#x;owska T. Alekseeva A. Alekseev M. Hajnos P. Szarlip 《Land Degradation \u0026amp; Development》2011,22(6):586-595
Soil irrigation with wastewater (WW) gives the opportunity to solve the problems of its disposal, final purification or reuse. Many studies have examined mineral soils upon continued WW application. The aim of this paper was to examine the properties of organic soils 3 years after WW application was discontinued. Peat‐muck soil planted with Populus spp. or Salix spp., and mineral‐muck soil under grasses were irrigated for 4 years with municipal WW at a low (comparable with intensive NPK fertilization) and high WW rate (600 and 1200 mm yearly, respectively). Soils were analysed for organic matter (OM), pH, bulk density (BD), water holding capacity (WHC), P2O5, Fe2O3, Al2O3, MnO, Zn, Pb, Cu, Cr, magnetic susceptibility (MS) and dehydrogenase and catalase activities. The results were compared with control soils which have never received WW. The study showed that only P2O5, MnO and catalase activity (CA) were significantly affected by former WW application. On average, P2O5 increased by 30 per cent, whereas MnO decreased by 35 per cent with no differences between the two WW rates. CA decreased by 18 per cent at the high WW rate. Most of tested characteristics were determined by soil type. The peat‐muck soil showed higher OM, WHC, P2O5, MnO, Pb and CA than mineral‐muck soil and lower BD, MS, Fe2O3, Al2O3 and Cr. Soil depth influenced Fe2O3, MnO, Zn, MS and enzyme activities, while basic soil properties (OM, pH, BD, WHC and P2O5) were not changed by soil depth. Heavy metals (Zn, Cr, Cu and Pb) were below upper permissible limits. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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Zhu Zuorong Hu Zhenying 《保鲜与加工》1990,(4)
This paper describs a case study of foundation engineering for forming sand and oval stone piles through the action of quaking, water striking,pouring and packing by a pile driver. The piles and packking mud are combined, forming a compound foundation to support the upper loads. This paper introduces the design and construction of this engineering. In order to check this method for consolidating the soft foundation,the loading test and the settlement observation in site are made. After the construction work,there has been an organized technical identifying meeting. The result out of the identification is positive. 相似文献
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振冲碎石桩在软弱地基中的应用 总被引：4，自引：0，他引：4
以固镇船闸的施工实例,介绍了在不排水抗剪强度ｃｕ值小于２０ｋＰａ的软缭淤泥地基中,采用拓冲碎石桩加固的施工方法和控制措施,并通过载荷试验得出加固后的承载力数值,并据此采用经济设计方案。 相似文献
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有机基质对番茄生长影响的研究 总被引：6，自引：1，他引：5
以草炭土(PS)、蚯蚓粪(ED)、牛粪(CM)做基质肥料,炉渣做基质,并加入蚯蚓(E),按肥料与炉渣2∶3的体积比组成8种有机基质配方,分别是:1 PS2、ED3、CM4、CM+20E5、ED∶CM=1∶1+20E6、ED∶CM=1∶1+10E7、ED∶CM=1∶2+20E8、PS∶ED∶CM=1∶1∶1,在光照室内利用盆栽试验研究了不同基质对番茄产量和品质的影响,以筛选利于番茄生长的优质基质。结果表明:番茄的产量处理5最高为304.63 g,其次是处理7、48、分别为146.151、40.401、36.45 g,再次是处理2、63、分别为126.511、20.019、1.17 g,最低是处理1为31.32 g;番茄的糖酸比以处理8最高为7.23,其次是处理5为6.73,再次是处理21、、67、4、分别为3.983、.71、3.66、3.63、2.79,最低是处理3为1.53。综上所述,最好的基质和肥料配方为处理5基质肥料比例1∶1的蚯蚓粪和牛粪并加入20条蚯蚓,能够满足番茄生长的需要。 相似文献
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三峡水库重庆库区“移土培肥工程”（一期）效益评价 总被引：1，自引：0，他引：1
三峡库区“移土培肥”工程在我国是1项全新的工程项目,对库区农村移民安置工作和社会经济的发展具有重要意义。介绍了三峡水库重庆库区“移土培肥工程”的背景和概况,阐述了其必要性,分析评价了工程的社会和经济效益。 相似文献
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三峡库区“移土培肥”工程在我国是一项全新的工程项目,对库区发展和耕地保护事业的开拓具有重要意义。介绍了三峡库区“移土培肥”工程的背景和基本概况,详细论述了工程的实施情况,并在此基础上对三峡库区“移土培肥”工程实施过程中可能产生的水土流失问题进行了分析并提出了相应的对策。本论文对于防止三峡库区“移土培肥”工程的水土流失具有重要的参考价值和指导意义。 相似文献