草屑覆盖对改良土壤的作用+文献综述
毕业论文关键词：草屑；覆盖物；土壤；理化性质；改良
Effects of grass cover on soil
Abstract: Grass is an important part of garden waste, at present the main treatment is to burial or burning freely, not only pollute the air but also waste agricultural resource. This issue primarily researches the physical and chemical properties of soil mulched by grass and analysis the ecological effect of grass cover principal and significant mechanism on garden soil, garden covered in grass resources utilization and provides the theoretical basis and technical support. The experiment studies the physic-chemical indicators of soil which contains the property of soil capacity heavy, temperature, pH, available and total N, P, and K content, organic matter content, microbial content, and then we continue discuss and system contrast analysis the four years’ data measurement, results indicates that: grass chip, as soil cover, can effectively improve soil of containing waterborne and pore degrees, regulate different season soil surface temperature. With increasing cover thickness, soil organic matter, available N, P, K content increased, what’s more, effects of cover thickness of 8cm most visible ,however ,effect of total N, P, K didn’t increase too much, but it’s still have a slow upward trend. In addition, soil remediation is a relatively lengthy process, and for four years was not enough to significantly improve the coverage of soil properties.
Keywords: Grass；Cover；Soil；Physical and chemical properties；Improvement
目录
摘要 i
Abstract i
目录 ii
1 绪论 1
1.1 研究背景 1
1.2 目前国内外的研究进展 2
1.3 研究目的与意义 3
2 实验材料与方法 4
2.1 覆盖材料 4
2.2 实验主要仪器与试剂 4
2.2.1 主要仪器 4
2.2.2 试剂 4
2.3 实验总体方法设计 4
2.3.1 试验地处理 4
2.3.2 土壤样品处理 4
2.3.3 土壤理化性质测定 5
2.4 土壤理化性质指标具体测量方法 5
2.4.1 土壤容重、含水量、孔隙度的测量 5
2.4.2 土壤温度测定 5
2.4.3 土壤微生物检测 5
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