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有些作物由于前期施肥不足,致使生长后期脱肥,导致产量降低。因此,进行根外追肥是一种必不可少的补充措施,对提高作物产量将起到不可忽视的作用。 一、主要特点 1.肥效快。科学证明,将化学肥料的溶液喷施到作物的叶片上,3—4小时即可发挥作用,最迟也不超过7—8小时。特别是作物生长后期,根系的生理机能衰退,吸收能力降低,此时采用根外追肥可收到理想的效果。
Some crops due to lack of pre-fertilization, resulting in post-growth fattening, resulting in lower yields. Therefore, top-dressing is an indispensable complementary measure and will play an important role in improving crop yield. First, the main features 1. Fertilizer fast. It has been scientifically proven that applying a solution of chemical fertilizers onto the leaves of a crop can work for 3-4 hours, no later than 7-8 hours at the latest. In particular, late crop growth, the physiological decline of the root system, reduce the absorption capacity, this time using the top dressing can receive the desired effect.