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杉木是目前南方主要的造林树种,每年造林面积大,育苗任务重。杉木属小粒种子,撒播育苗的除草工作十分艰难,在杉苗生育过程中需拔草8～10次,农忙时劳动力紧张,常造成草荒。同时,拔草带走了部分杉苗,影响成苗的数量和质量。因此,在林业圃地上筛选出药效期长、对苗木安全的除草剂,是刻不容缓的工作。近年来我们曾在圃地上试验了10多种除草剂,结果以氟乐灵效果显著,现将试验结果整理于下:
Cunninghamia lanceolata is the main afforestation species in South China. The annual afforestation area is large and the task of raising seedlings is heavy. Cunninghamia small seeds, seedling weeding broadcast weeding very difficult, in the process of fir seedlings to be drafted 8 to 10 times, labor-intensive labor shortage, often resulting in grassland shortage. At the same time, weeding took away part of fir seedlings, affecting the quantity and quality of seedlings. Therefore, in the forestry nursery on the ground screening for a long-term efficacy of seedlings safe herbicide, it is an urgent task. In recent years, we have tested more than 10 kinds of herbicides on the ground and the result is that trifluralin has a remarkable effect. Now the test results are summarized as follows: