论文部分内容阅读
叶片施肥也称根外追肥,是将肥料配成一定浓度的溶液喷洒在树冠或植物叶片及茎上的施肥方法。一、优点①比土壤施肥灵活,能及时纠正或满足植物对养分的需要,见效快。②可避免养分与土壤接触而被土壤固定的不利因素,养分的利用率高。③肥液与某些物混用喷洒有增效作用,与农药混用节约劳力。二、影响叶面施肥效果①肥液在植物表面存留量的多少是影响肥液进入的第一因素,一般喷射角和叶面成45°～90°时存留
Leaf fertilization, also known as top dressing, fertilizer is dubbed a certain concentration of solution sprayed on the crown or plant leaves and stems fertilization methods. First, the advantages ① more flexible than the soil fertilization, timely correction or meet the needs of plants on nutrients, see the quick. ② to avoid nutrients and soil contact with soil fixed negative factors, high utilization of nutrients. Â ’¢ fertilizer and some mixed with spray synergistic effect, mixed with pesticides to save labor. Second, the effect of foliar fertilization ① The amount of fertilizer on the surface of the plant is the first factor affecting the fluid into the liquid, the general spray angle and leaves at 45 ° ~ 90 ° survival