Control of yellowing of leaves of Ziziphus jujuba

The yellowing of winter jujube leaves is mainly caused by the weakness of tree potential, and there are many reasons for the yellowing of leaves. First, due to bacterial scab, jujube rust, dry rot and other diseases, leading to early defoliation, insufficient nutrients in the tree reserve, weak tree potential, resulting in yellowing of leaves; second, poor healing of nail mouth, weak tree potential, lack of water and nutrients caused yellowing of leaves; third, low-lying terrain, serious waterlogging, yellowing of leaves Fourth, root diseases or excessive application of chemical fertilizer, resulting in fertilizer damage, rotten roots, dead roots, insufficient water and nutrition supply lead to yellow leaves; fifth, some symptoms of element deficiency, such as iron deficiency, nitrogen deficiency, phosphorus deficiency, sulfur deficiency, copper deficiency, zinc deficiency, manganese deficiency and so on will cause leaf yellowing.

In order to prevent and treat the yellowing of winter jujube leaves, we should first analyze and diagnose the causes of leaf yellowing, and then prescribe the right medicine. For example, when yellow leaf disease occurs due to element deficiency, tree nutrition should be replenished in time, but some elements such as iron, zinc and phosphorus should be supplemented alone, so it is difficult for jujube trees to absorb. Therefore, attention must be paid to the way of fertilizing. Underground topdressing should be adopted, and mature farm manure or multi-element organic-inorganic compound fertilizer should be selected, or amino acid chelate fertilizer should be used for root irrigation. You can also spray fertilizer on the leaf, spraying 0.7% Hualebao or total nutritional amino acid chelated fertilizer every 15 days, such as amino acid chelated iron, calcium, zinc, manganese, Tianda 2116 plant cell membrane stabilizer, jujube advanced nutrients and so on.