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本文介绍在印度孔坎地区芒果增殖苗圃的化学除草试验结果。材料和方法 1981—1982年3—4月,在印度达波利农学院的5龄Alphonso芒果增殖苗圃中进行试验,株距1.5×1.5米,共8个处理,4次重复,按随机区组设计。试用6种除草剂:阿特拉津(4公斤/公顷),氟乐灵(3升/公顷),甲草胺(2升/公顷),台湾去草胺(30公斤/公顷)和丁草胺颗粒剂(30公斤/公顷),上述除草剂都是在杂草萌前施下,而百草枯(3升/公顷)则在杂草萌后施用。每15天进行一次人工除草。施药后第30、60、90天,观察杂草群落,记录各处理区中一平方米的杂草鲜重与干重,用以下公式计算除草效率。除草效率=(W_0-W_t)/W_0×100
This article presents the results of a chemical herbicidal test of mango multiplication nurseries in Kongkan, India. MATERIALS AND METHODS From March 1981 to March 1981, experiments were carried out at the 5th-instar Alphonso mango proliferation nursery at Polytechnic College, India, at a distance of 1.5 × 1.5 meters with 8 treatments and 4 replicates. Randomized block design . Six herbicides were tested: atrazine (4 kg / ha), trifluralin (3 liters / ha), alachlor (2 liters / ha), Taiwan herbicide (30 kg / ha) Amine granules (30 kg / ha) were applied prior to the weeds and paraquat (3 l / ha) was applied after weeds. Every 15 days for a manual weeding. Weed communities were observed on the 30th, 60th and 90th days after application. The fresh weight and dry weight of one square meter of weeds in each treatment area were recorded. The weed efficiency was calculated by the following formula. Herbicidal efficiency = (W_0-W_t) / W_0 × 100