摘要
在油松人工幼林地进行不同种类及不同浓度化学除草剂除草试验表明，草甘膦对杂草的杀除效果优于森草净，而对灌木的杀灭效果低于森草净。化学除草后，林下可燃物干重由１０１９ｇ／ｍ２降低到２９２．８ｇ／ｍ２，活地被物基本消失。草甘膦除草最佳浓度为１５００ｇ／ｈｍ２，森草净灭灌适宜浓度为１２００ｇ／ｈｍ２，喷药时问以６月中下旬最佳，费用比人工除草低６３．９％和４４．４％。
Two herbicides, Glyphosate and Sencaoding, with different concentrations were tested to control weeds and shrubs. The results showed that Glyphosate was superior to Sencaodingin controlling weeds, but inferior to the latter in controlling shrub. After treatment, the dryweight of burnable materials under trees lowered from 1 019g/hm2 to 292. 8g/hm2, and all theliving litter was killed. The results indicated that the optimum concentration of Glyphosate forcontrolling weeds was 1 500g/hm2, and that of Sencaoding for controlling shrubs was 1 200g/hm2, the middle and the last ten days of June were the best time for praying the herbicids. Thecomparison between herbicide and manual controls showed that the expenses were lowered 63. 9percent and 44. 4 percent respectively.
出处
《西北林学院学报》
CSCD
1995年第4期52-57,共6页
Journal of Northwest Forestry University
关键词
油松
草甘膦
森草净
除草效益
可燃物量
Pinnus tabulae formis
Glyphosate
Sencaoding
control weed
burnable material
