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随着作物栽培技术的发展,除草剂种类增多和质量的提高,同时为了节省劳力,采取除草剂和化肥共同施用是很必要的。目前美国可供混合使的化肥有五种类型,除草剂有300余种。在采用含氮-磷-钾为2-1-1或3-1-1的低浓度液体化肥与除草剂混合液时,常向谷物、蔬菜和多年生牧草进行地面喷洒,因为在水浇地和轻质砂土壤上施肥深度不是影响肥效的决定因素。但若采用高浓度化肥(含氮-磷-钾为10-43-0,11-37-0)时,则施肥后必须覆土,而不应喷洒。美国堪萨斯大学的试验表明,由液体复合肥料(含氮-磷-钾为15-15-15),磷酸铵(含氮-磷-钾为12-40-0)和三氮杂苯衍生物类除草剂组成的混合液,施用效果最好。近年来,已生产可与固体化肥混合的除草剂乳剂制品。固体化肥与除草剂乳剂混合时,需先在除草剂
With the development of crop cultivation techniques, the increase of herbicide species and the improvement of quality, and in order to save labor, it is necessary to adopt herbicide and fertilizer together. There are currently five types of fertilizers available in the United States and more than 300 herbicides. Spraying of cereals, vegetables and perennial grasses is often carried out using low concentrations of liquid fertilizers and herbicides containing nitrogen-phosphorus-potassium of 2-1-1 or 3-1-1, because in irrigated and Fertilizer depth on light sandy soils is not a determinant of fertilizer efficiency. However, if high concentrations of fertilizers (including N-P-K 10-43-0,11-37-0) are used, soil must be applied after fertilization rather than spraying. Tests conducted by the University of Kansas showed that the combination of liquid compound fertilizers (nitrogen-phosphorus-potassium 15-15-15), ammonium phosphate (nitrogen-phosphorus-potassium 12-40-0) and triazine derivatives Herbicide composition of the mixture, the best application. In recent years, herbicide emulsions that can be mixed with solid fertilizers have been produced. Solid fertilizers and herbicides mixed emulsion, the need to first herbicides