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杂草是苗圃育苗的天敌,本文通过对10种不同化学除草剂除草效果的试验,筛选出了适宜于兴安落叶松播后芽前和苗期使用的除草剂剂型和剂量.它们是:25%除草醚可湿性粉剂8.0g/m2(商品量,以下同)进行毒土或喷雾处理;25%除草醚可湿性粉剂8.0g/m~2与尿素5.0g/m~2混合喷雾使用;用48%氟乐灵乳油0.5ml/m~2进行土壤喷雾并伴以松土措施,其除草效果均可达98%以上.采用12.5%盖草能乳油0.06ml/m~2进行茎叶处理,对防除禾本科杂草其效果可达100%.23.5%果尔乳油0.06～0.12ml/m~2对防止兴安落叶松苗圃地的杂草有特效,是十分理想的除草剂类型.
Weeds are the natural enemies of seedling nursery nursery, we tested the herbicidal effect of 10 different chemical herbicides, and selected the suitable herbicide dosage forms and doses suitable for the use of Larix gmelinii Weeding ether WP 8.0g / m2 (commercial volume, the same below) for soil or spray treatment; 25% of weeding ether WP 8.0g / m ~ 2 and urea 5.0g / m ~ 2 mixed spray use; % Trifluralin EC 0.5ml / m ~ 2 was sprayed with soil and loosening soil, its weeding effect could reach more than 98% .The stems and leaves were treated with 0.06ml / m ~ 2 of 12.5% Its effect is up to 100% against grasses and weeds, and 23.5% of fruit oil ECL 0.06 ~ 0.12ml / m ~ 2 is effective for preventing weeds in Larix gmelinii nursery. It is an ideal type of herbicide.