香榧苗圃地除草剂筛选试验

为提高香榧苗圃地杂草的防除效果,保护苗木,降低用工成本,选用普通市售除草剂,采用随机区组和正交设计筛选对香榧苗木无害且有效的除草荆单荆和组合.结果表明:(1)推荐剂量范围内不同除草剂对香榧苗圃地杂草都有一定的防除效果,药后第28天的株防效在57.46%～74.63%之间.果尔、百草枯的株防效较好,时效较长,可以选用;草甘膦的短时株防效最高,但时效短;精稳杀得起效较慢.(2)不同浓度除草剂混用后的除草效果比单剂好,药后第28天的株防效在84.32%～94.74%,筛选出的24%果尔乳油(1 050 mL/hm2)+10%草甘膦水剂(16 500 mL/hm2)+15%精稳杀得乳油(450 mL/hm2)复配剂除草效果最佳.(3)香榧苗圃地使用除草剂对苗木生长无影响,而且工效高,伤苗少,成本低,相对人工除草降低1 950 元/hm2以上.

Herbicide Selection in Torreya grandis 'Merrillii' Plant Nursery

In order to effectively control weeds in T.grandis 'Merrillii' plant nursery,protect nursery stock and reduce employing cost,the randomized block and orthogonal design were used to select single herbicides or their combination in this paper.The results showed that:(1) All the herbicides used in the experiment had certain control weed effect in T.grandis 'Merrillii' plant nursery within the recommended dose,and after 28 days the control effect was between 57.46%~74.63%.The control effect with Goal or Paraqua...