How to rescue citrus trees affected by drought

(agricultural Rich Network) (1) timely water supply after drought, citrus trees should be supplied by ditch irrigation or sprinkler irrigation. As its roots and leaves are damaged to a certain extent, the amount of water replenishment should be increased step by step, not suddenly a large amount of water supply, so as not to continue to hurt the roots and leaves.

(2) the application of more fertilizer can promote the recovery of citrus. Foliar fertilizer was sprayed twice every 7 to 10 days, with 0.3% urea and 0.2% potassium dihydrogen phosphate solution sprayed each time. Combined with drought resistance, applying strong fruit and promoting shoot fertilizer to prevent autumn drought and fruit picking fertilizer to prevent winter drought. Rhizosphere fertilization was applied to each plant with 20% rotten human and animal manure water and 200 grams of urea. Topdressing water and fertilizer is beneficial to the absorption and utilization of citrus roots as soon as possible.

(3) the plant growth regulator can be sprayed with 2P4-D solution with a concentration of 10mg / L and 15mg / L to prevent the leaves from falling off.

(4) reasonable pruning of branches and leaves in mid-late July combined with summer pruning, for orange trees suffering from moderate drought, the existing branches and leaves should be retained as far as possible, and pruning should be light; for trees suffering from severe drought, 2 ~ 3-year-old branches should be retracted moderately to promote more branches in the inner chamber of the crown.

(5) protecting the tree body and painting the citrus trunk with white coating in time to reduce the radiation heat. For the citrus trees damaged by drought, because there are many withered branches and fallen leaves, they are easy to be burned by sunlight, so they should be smeared with 20-fold solution of topiramate or 20-fold solution of Ye Kuning in time to protect them. Dry and then wrap it with black plastic film to promote wound healing.