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叶面喷肥也叫根外追肥,与其它追肥一样,主要是辅助树木营养的不足。它又与一般追肥不同,营养物质不是通过根部,而是直接施于叶面后被吸收的。它是一种经济有效的施肥方法,因而在近代林业中,是一项重要的增产措施。要使叶面喷肥发挥出最佳的效果,必须严格掌握以下几方面技术: 一、选择好喷肥时的天气。叶面喷肥要求在无风晴天进行,并预计喷后3—5天内后仍是晴天,至少无雨天。这样一方面保证喷的肥料能有较长时间停留在叶面;另一方面叶片光合作用旺盛,有利于提高喷肥效果。二、掌握好喷肥时间。在一天中,以傍晚喷肥效果最好,其次
Foliar fertilizer, also known as root top dressing, and other top dressing, mainly to support the lack of tree nutrition. It is different from the general top-dressing, nutrition is not through the roots, but directly after the leaf is absorbed. It is a cost-effective fertilization method and therefore an important stimulation in modern forestry. To make the foliar fertilizer to play the best effect, we must strictly control the following aspects of technology: First, select the weather when spraying. Foliar fertilizer requirements in the sunny days, and is expected to spray within 3-5 days after the still sunny, at least no rainy day. On the one hand to ensure that spraying fertilizers have a longer time to stay in the foliage; leaf photosynthesis on the other hand, is conducive to improving fertilizer efficiency. Second, good time to spray fertilizer. In the course of the day, the effect of spraying fertilizer in the evening is best, and secondly