First, scientific fertilization. Organic compound fertilizer with complete macro, medium and trace elements is beneficial to leaf growth. First, it can strengthen leaves, that is, leaves become thick and green; Second, it can protect the leaves, that is, prolong the life of the leaves. The leaves of single application of binary or ternary inorganic compound fertilizer are green but not thick or thick.
Second, rational fertilization. According to the growth characteristics of Illicium verum, fertilization should be mainly based on shallow application and thin application, and balanced supply of nutrients should be maintained throughout the year. Avoid deep furrow fertilization, heavy fertilization and fertilization under drought and water shortage, otherwise the roots will be affected and the leaves will decline or fall.
Third, spray foliar fertilizer. Foliage fertilizer has obvious effect on keeping strong leaves, especially in winter and spring when defoliation is serious. Spraying foliar fertilizer for 2-3 times can reduce defoliation. The foliar fertilizer should be organic or compound, such as Gaomeishi, Xinzhisu and Feiba.
Fourth, strictly control the frequency and weight of the use of inhibitory hormones. Most inhibitory hormones have certain effects on flower promotion, flower protection and fruit protection, but they are also harmful to leaves, so they should be used with caution. Generally, it is advisable to use it no more than three times a year, the concentration should also be strictly controlled, and the spraying amount should be sprayed until the leaves are wet but not dripping. * so that foliar fertilizer can be sprayed together to reduce the damage to the leaves.
Fifth, pruning. Over-shaded leaves only consume nutrients but do not produce nutrients, and the life span of these leaves is relatively short, so the branches should be cut off. But don't cut them all off, because these branches can also blossom and bear fruit.
Six, pest control. Anthracnose, canker, soot, scale insects, aphids, mites and other pests and diseases all first affect the leaves or cause yellow leaves, leaf curl, deciduous leaves or reduce the life of leaves, so we should prevent and control all kinds of pests and diseases in time.
Seven, water supply. Long-term drought will cause leaves to lose water and curl, and even a large number of leaves will fall. If conditions permit, water should be poured or drenched in time.
Eight, reasonable fruit. Too much fruit hanging is beyond the reasonable load of the tree, which has a negative impact on the leaves, tree potential and annual output in the future. After the first physiological fruit drop, too many young fruits should be thinned out.
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Through our introduction, I believe everyone knows how to ensure the leaves of Illicium verum. Have a deeper understanding.