化学除草剂在育苗生产中的应用

Application of Chemical Herbicides in the Nursery Production

采用果尔、除草醚和扑草净三种除草剂分别对落叶松、樟子松和云杉当年播种育苗进行化学除草对比试验,试验共分三次进行,其中出苗前一次、苗期两次,每次设30个样方,5个重复。试验结果表明,出苗前用药效果最好,灭草率果尔为97.6%、除草醚为92.6%、扑草净为94%;苗期两次试验的除草效果分别为:果尔93.6%和89%、除草醚86.3%和83.2%、扑草净91.4%和86.7%;采用化学除草与采用人工除草相比,可分别降低成本81.5%、76.7%和79.7%。

In this article, we have used three kinds of herbicide （Oxyfluorfen, Nitrofen and Prometryne ） for Larix principis, Pinus sylvestris var.mongolica and Picea asperata＇s year sown trees respectively for chemical weeding. The tests have done three times, including once before seeds＇ emergence and twice after seeds＇ emergence, in which with 30 plots and 5 repeats everytime. The experimental shows that Oxyfluorfen＇s efficiency can reach 97.6%, Nitrofen＇s is about 92.6% and Prometryne＇s is 94%, which indicates the effect of the medicine is the best before the tree seedlings＇ germination. The results of two times tests after the germination are that Oxyfluorfen＇s efficiency are 93.6% and 89%, Nitrofen＇s are 86.3% and 83.2%, and Prometryne＇s are 91.4% and 86.7%. Reading the response from these, we can see comparing with manual weeding, medicine can reduce the cost of 81.5%, 76.7% and 79.7% respectively.