论文部分内容阅读
化学除草剂在园林绿化中,如果使用得当,能及时控制和消灭杂草,对树木生育没有不良影响,并促进其生长,提高生产率。如使用不当,则会造成苗木受药害和环境污染等不良后果。因而研究除草剂的药效和杂草及树木之间的利害关系,是生产上急待解决的问题。为此,我们选用了敌草隆、五氯酚钠、扑草净、西玛津等十几种化学除草剂在桧柏、油松、云杉、银杏、杨树、臭椿等乔灌木的大苗区和桧柏、油松、刺槐、黄杨播种区以及林带和公园草地、道边试用。试验结果表明,各种化学除草剂的灭草效果随杂草种类、药剂用量,施用时期和方法的不同而不同(见下表)。由上表可见,大部分化学除草剂,如敌草
Chemical herbicides in landscaping, if used properly, can control and eliminate weeds in a timely manner, no adverse effects on tree growth, and promote their growth and increase productivity. If used improperly, it will cause nuisance seedlings and environmental pollution and other adverse consequences. Therefore, the study of the efficacy of herbicides and the relationship between weeds and trees is an urgent problem in production. To this end, we use diuron, sodium pentachlorophenol, prometryn, simazine more than a dozen chemical herbicides in cypress, pine, spruce, ginkgo, poplar, Ailanthus altissima and other shrubs seedlings District and juniper cypress, pine, acacia, boxwood sown areas and forest and park lawn, roadside trial. The test results show that the herbicidal efficacy of various chemical herbicides varies with the type of weed, the amount of drug used, the period of application and the method (see table below). As can be seen from the above table, most chemical herbicides, such as diuron