Controlling the suitable amount of broad-leafed grass in grassy field
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The grass is a leguminous herb, and its scientific name is Huanghuaya, also known as cauliflower, grass head and so on. In recent years, the planting area of ​​barnyardgrass has gradually increased in Yangzhong City, but part of the plots have severe weed damage, especially hardwood weeds are difficult to control. In this regard, we used a 48% solution of anti-grass pine to control broad-leaved weeds in alfalfa grassland. The test set up 5 different doses of treatment, respectively, per acre with 48% solution of pine grass water 150 ml, 200 ml, 250 ml, 300 ml and 350 ml, add 30 kg of water spray. The broad-leaved weeds in the experimental plots consist mainly of mica pots, rolling ears, and brambles of the family Caryophyllaceae, gray ashes of the family Polygonaceae, black locusts of the family Polygonaceae, and wild plants of the Scrophulariaceae. Amaranthaceae, wild oilseed rape, sophora nymphalis, Rubiaceae, such as piglets. Among them, grey-ash dishes had the highest frequency, accounting for 19.57% of the total grass volume; followed by mava, which accounted for 15.22% of the total amount of grass; Laverna, leek each accounted for 11.96% of the total; Alfalfa and sour clams accounted for about 10% of the total; alfalfa, ear-fed, clam, and hedgehog accounted for about 21% of the total. The field grass weeds were uniformly used to control flufenaphan. Judging from the experimental situation, there is a big difference in the control effect of different amounts of 48% anti-grassip lotion on broad-leaved weeds, and the control effect increases with increasing dosage. The treatment effect of 150 ml per mu is the worst, the control effect of the strain and fresh weight is only about 57%, and the fresh weight control effect of 200 ml, 250 ml, 300 ml, and 350 ml per mu is 88.27 respectively. %, 95.35%, 98.89% and 99.11%. The treatment with the dose per acre within 250 milliliters did not produce phytotoxicity to the alfalfa, but the treatment with over 300 milliliters of medication showed different levels of phytotoxicity, which showed that the edges of the alfalfa leaves were yellow, and the dried leaves were dry, but there was no whole plant death. Phenomenon that phytotoxic plants usually grow new leaves after 10 days and are visually similar to normal plants. The test results show that 48% of the anti-grass pine water agent has good control effect on the broad-leaved weeds in the weed grass field. It is recommended to use 250-300 ml per acre for the production. Pay attention to the control of the grass seedling stage, weeds 3-5 leaf stage medication, medication is too late grass age, plus madder grass to grow vigorously, weeds are blocked by grass, weeding effect is affected.