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为摸清东北春大豆区保护性耕作大豆田间杂草的发生规律,控制杂草危害,提高作物产量,对大豆田的杂草进行调查并进行化学除草剂防效试验。结果表明:保护性耕作大豆田主要发生的杂草有6科13种,禾本科杂草占65%,阔叶杂草占25%,其它杂草占10%,且狗尾草、稗草、藜、黄花蒿、卷茎蓼和苦苣是保护性耕作大豆田主要杂草。5种除草剂中等浓度处理的防除杂草效果和增产率均表现为:48.8%咪.氟.灭草松>48%灭草松>41%草甘膦>5%咪草烟>25%氟磺胺草醚。以2 250 mL.hm-241%草甘膦、3 150 mL.hm-248%灭草松和2 250 mL.hm-248.8%咪.氟.灭草松的除草效果更佳,在农业生产中可优先选用。
In order to find out the law of occurrence of weeds in protective tillage soybean field in the northeast spring soybean area, control the weed damage, increase the crop yield, investigate the weeds in the soybean field and carry out the chemical herbicide control experiment. The results showed that there were 6 families and 13 species of weeds in protected tillage field, 65% in grass weeds, 25% in broad-leaved weeds and 10% in other weeds, and 6 species of Setaria viridis, barnyardgrass, quinoa, Artemisia annua, Polygonum viviparum and Borage are the main weeds in conservation tillage soybean fields. The herbicide effect and yield increase of the five herbicides treated with medium concentration were as follows: 48.8% Microfluoride, imazapyr> 48% mephitis mellitus> 41% glyphosate> 5% imazethapyr> 25% fluorine Sulfamethoxazole. Herbicides with 2 250 mL.hm-241% glyphosate, 3 150 mL.hm-248% imazapyr and 2 250 mL.hm-248.8% imidacloprid had better herbicidal effect in agricultural production May be preferred.