外来植物北美车前入侵土壤的微生物特征与理化性状相关性分析
毕业论文关键词： 北美车前；梯度种植；理化；分离鉴定
Exotic plant invasion of soil microbial characteristics and physical and chemical character correlation analysis
Abstract: North American car is native to North America, is a biennial herbaceous plant. Is the lawn weeds, orchards, dry field, and when the population density is big, pollen number is large, may cause the pollen allergy. In this subject acquisition bermudagrass, Kentucky bluegrass, cut glume grass, tall fescue, 4 kinds of processing and north American car mixed planting soil samples of different density, pided into four density, to count, cultivation of actinomyces and fungi in for each strain microscope observation and description; For different processing grass and multiple soil samples of different planting density on moisture, pH, physical and chemical indexes such as total nitrogen determination. To their invasion of the north American car of the soil pH between 5.5 7.0 is the total change trend obvious growth, suggests that the north American car invasion changed the acid and alkaline soil, soil moving in the direction of alkaline. North American car invasion on the local amount of total nitrogen in the soil affect trend, different effects on different processing. The number of actinomycetes in the soil also increased with the degree of the invasion of the north American car, moderate invasion was most affected, there is a feedback between the role, then decreases, and that the north American car can promote the growth of actinomyces in soil appropriately. North American car invasion changed local soil acid, alkaline, make the change in the direction of an alkaline soil, change the growth of actinomyces in soil environment, lead to actinomyces quantity change, the structure change in the soil microbial species.
Keywords: North American car; Gradient planting;;The physical and chemical properties;Separation identification
目录
1 绪论 1
1.1 本课题国内外研究现状概述 1
1.1.1 中国外来入侵植物研究现状 1
1.1.2 外来植物入侵的危害 3
1.1.3 我国防治和管理现状 4
1.2本课题的研究目的和意义 4
2 实验材料和方法 9
2.1 材料试剂 9
2.2 仪器设备 9
2.3 实验流程 10
2.4 实验内容 10
2.4.1 对北美车前入侵前后的土样采样 10
2.4.2 土壤理化性质的测定 11
2.4.3 土壤微生物的分离和计数 13
2.4.4 菌株的分类和初步鉴定方法 13
上一篇：主要校园植物叶片养分状况调查分析