乙氧氟草醚、乙草胺和盖草能在苗圃中的应用

Application of oxyfluorfen,acetochlor and haloxyfop in forest nursery

为了探讨乙氧氟草醚、乙草胺和盖草能在森林苗圃中的应用效果,进行马尾松Pinusmassoniana、火力楠Micheliamacclurei和乳源木莲Manglietiayuyuanensis苗圃化学除草正交试验。试验结果表明,乙氧氟草醚和乙草胺在苗圃播种后芽前期使用和苗期使用乙氧氟草醚、乙草胺和盖草能除草率达90%以上,持效期45～63d,同时对种子发芽出苗和苗木生长安全。采用20%乙氧氟草醚、90%乙草胺和10 8%盖草能,使用剂量为0 105mL·m-2进行化学除草,比人工除草减少除草用工59 1%～66 7%,降低除草成本46 8%～62 9%。

An orthogonal test of the chemical herbicides in the nurseries of Pinus massoniana,Michelia macclurei and Manglietia yuyuanensis is conducted to study the weeding effects of oxyfluorfen,acetochlor and haloxyfop.The results show that the weeding effects of oxyfluorfen,acetochlor before emergence and oxyfluorfen,acetochlor and haloxyfop during seeding stage are over 90%.The effective duration is 45～63 days.These chemical herbicides are safe for seed germination and seedling growth.The labor use of applying 0.105 mL·m~ ( -2) herbicide consisting of 20% oxyfluorfen,90% acetochlor and 10.8% haloxyfop is 59.1%～66.7% less than that of manual weeding and the cost of the former is 46.8%～62.9% less than the latter.[Ch,3 tab.4 ref.]