废弃砖块覆盖土壤表面对土壤水分蒸发的影响
时间:2018-04-10 14:37 来源:毕业论文 作者:毕业论文 点击:次
| 【摘要】 随着时代的发展，人们对事物的要求越来越高，在不断变化的过程中，难免会产生许多废弃物。建筑物的拆迁留下的砖块便是其中一种。现在对废弃砖块的处理方法有很多：填埋，碾碎后铺路等。而如今水资源对于全球来说都是严重紧缺的状态，所以节水是势在必行的。然而，在国内外的覆盖物研究中，多是以有机物为材料进行研究。本次研究是对废弃砖块在园林中保水的应用提供依据。通过室内盆栽试验，研究了4个不同粒径的废弃砖块覆盖土壤表面对土壤水分蒸发的影响。结果表明：4种粒径的砖块均能有效抑制土壤水分蒸发、减少水分的流失。抑蒸效果随粒径的减小而提高。即粒径0.5以下的砖块覆盖效果最好，其它粒径的砖块效果依次为大于等于5mm<2mm-5mm<0.5mm-2mm<0.5以下。相对于空白对照，覆盖处理的土壤PH值变化幅度要明显大于空白对照。有覆盖处理的土壤PH值都明显增加了，而空白对照的PH值基本没变化。因此，覆盖处理同时提升了土壤了PH值。20853 。毕业论文【关键词】：覆盖物；废弃砖块；水分蒸发；土壤 Research on effects of covering waste bricks 【Abstract】：With the development of the times, to which people have become increasingly demanding, in the process of changing, it can produce a lot of waste. The demolition of a building to leave the bricks is one of them. There are a lot of treatment method for the waste: landfill, crushed bricks paving etc.. Now the water resources for the whole world is in serious condition, so the water saving is be imperative.However, research covers at home and abroad, mostly with organic materials were studied. This study is to provide a basis for application of waste bricks retaining water in garden. Through the indoor experiment, studied 4 different particle size of waste bricks effect of Mulching on soil surface evaporation of soil moisture. The results show that: 4 different particle sizes of bricks are to restrain soil water evaporation, improve the water utilization purposes. Evaporation inhibiting effect increased with the decrease of particle size. The particle size below 0.5 bricks covered the best effect. Other size bricks are greater than or equal to 5mm<2mm-5mm<0.5mm-2mm< below 0.5. Compared with the blank control, soil pH value range of coverage is obviously higher than the blank control. A soil pH mulching treatments increased significantly and the blank control of basic no change in pH. Therefore, coverage improves the soil pH. 【key words】: Covering; Discarded bricks; Evaporation of water; Soil 目 录 1 引言 1 1.1 研究背景 1 1.2 覆盖物特性介绍 1 1.3 研究的意义 2 1.4 国内外对覆盖物的研究进展 2 1.5废弃砖块作为覆盖物的特性及应用价值 3 1.5.1 特性 3 1.5.2 应用价值 3 1.6 在园林中的绿化作用 4 1.6.1 市街绿化 4 1.6.2 公园绿化 5 1.6.3 庭院绿化 5 2 材料与方法 6 2.1试验材料 6 2.2试验设计 6 2.3试验方法 6 3 实验结果与分析 7 3.1废砖对基质水分蒸发的影响 7 3.2 不同粒径大小的废弃砖块对基质水分蒸发量的抑制效果 8 3.3 不同覆盖量对基质水分的影响 9 3.4 覆盖物对基质PH的影响 9 4 问题及讨论 11 致谢 12 参考文献 13 1 引言 1.1 研究背景 (责任编辑：qin) |