论文部分内容阅读
目的了解林业血防工程对相关环境生态因子的影响。方法在长江安徽段上、中、下游各选择一个实施林业血防工程的环境,并在其邻近选择一个有螺草滩或芦苇滩环境作为对照观察点,分别观察环境草本高度和草本盖度,测定土壤水分、温度、硬度及有效磷、有效钾、碱解氮等的含量,比较分析林地和草滩有螺环境中相关环境因子的差异。结果 3个试点林业血防工程环境平均草本高度和土壤硬度均高于草滩环境,但平均草本盖度、土壤温度和土壤水分均低于草滩环境。林地环境土壤pH值趋于碱性化,土壤中的有效磷、有效钙、有效硫、有效锌等成分含量均低于芦苇滩环境,有效锰成分林地环境则高于芦苇滩环境。结论林业血防工程对环境生态因子产生一定的影响,促使环境因子向不利于钉螺孳生繁殖的方向发展。
Objective To understand the impact of forestry blood-protection project on related environmental ecological factors. Methods One of the upper, middle and lower reaches of Yangtze River in Anhui Province was chosen as an environment for the implementation of the forestry blood protection project and a conch environment of conch or reed beach was chosen as the control observation point. The height of the environment herb and the cover of the herb were observed, Water, temperature, hardness, available phosphorus, available potassium, and alkali-hydrolyzable nitrogen, were compared to analyze the differences of related environmental factors in the snail environment. Results The average herb height and soil hardness of the three experimental forestry blood-protection projects were higher than that of grassland, but the average herb cover, soil temperature and soil moisture were lower than that of grass beach. The pH value of soil in the forestland environment tended to be alkaline. The contents of available phosphorus, available calcium, available sulfur and available zinc in the soil were lower than those in the reed beach. The available manganese was higher in the forestland than in the reedbeds. Conclusion The forestry blood-protection project has a certain impact on the environmental ecological factors, promoting the development of environmental factors in a direction unfavorable to snail breeding.