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葡萄叶面喷肥,受肥面广,肥效迅速,省工省肥,效果理想。 一、喷肥适期 在葡萄的整个生长季节均可进行叶面喷肥。但以在新梢生长前喷施“催梢肥”、在开花及座果期喷施“稳花稳果肥”、在果实膨大期喷施“壮果肥”最好;整个生长发育期,发现缺素症时,应及时对症喷肥补救。从萌芽、展叶至开花前,宜喷氮肥;从春季新梢开始生长,到浆果成熟期,尤其是新梢旺长期到浆果膨大期,宜喷磷肥;浆果膨大期宜喷钾肥;浆果变软初期宜喷稀土;花期喷硼效果明显。 二、适宜的肥料与浓度 常用的氮肥有0.3％尿素
Grape foliar spray, fat by a wide range, rapid fertilizer, provincial labor and fertilizer, the effect is ideal. First, the appropriate period of spraying Grape in the entire growing season can be foliar fertilizer. However, it is best to spray “Zhoushi Fat” before the shoot growth and “Stable flowering solid fertilizer” during the flowering and fruit setting periods, and spray “Zhuang Fruit Fertilizer” during the fruit enlargement period. During the whole growth and development period, Found when lack of disease, should be timely symptomatic spray fat remedy. Sprout from the bud, leaves before flowering should be sprayed nitrogen fertilizer; from the beginning of the spring shoot growth, to the berry ripening period, especially the long shoots to the berry swollen period, appropriate spraying of phosphate fertilizer; Should be sprayed rare earth early; flowering boron effect is obvious. Second, the appropriate fertilizer and concentration of commonly used nitrogen fertilizer 0.3% urea