论文部分内容阅读
(1)因地制宜选用肥料。在使用时,应根据不同作物的需肥规律、特点,选择叶面肥。在购买时,应到正规厂家或农技推广中心进行购买.(2)准确均匀喷施肥料。叶面施肥要注意喷施的用量和浓度,一般氮、磷、钾等大量元素肥料,在作物生长前期喷施浓度可适当小些,中后期要适当高些。用微量元素肥料进行叶面追肥,更要严格掌握用量和浓度。(3)恰当把握喷肥时间。叶面喷施主要是补充植株养分不足或营养元素不全,尿素、磷酸二氢钾、过
(1) Choose fertilizer according to local conditions. In use, should be based on different crops need fertilizer rules, characteristics, choose foliage fertilizer. At the time of purchase, should go to the regular manufacturers or agricultural technology promotion center to buy. (2) accurately and evenly spraying fertilizers. Foliar fertilizer should pay attention to the amount and concentration of spraying, the general nitrogen, phosphorus, potassium and other large amounts of elemental fertilizer, spraying the crop growth in the early concentration may be appropriate smaller, the latter part of the appropriate high. With trace element fertilizer foliar fertilizer, but also to strictly control dosage and concentration. (3) proper grasp of fertilizer time. Foliar spray is mainly to supplement plant nutrient deficiency or nutrient insufficiency, urea, potassium dihydrogen phosphate, too