Before and after irrigating fruits with antifreeze, use a quick-acting fertilizer to mix roots with water, apply 0.2% to 0.3% of potassium dihydrogen phosphate plus 0.5% urea mixture or chitin compound fertilizer to supplement nutrients to promote rapid restoration of tree vigor. Accumulation of nutrients, robust tree growth, increased cold resistance, and organic fertilizer application after fruit picking.
After plucking soil and picking fruit, combine pruning and purifying gardens, dig soil and fertilize, select pond mud, river mud, field soil, etc., and carry out roots, stems, and trees to cultivate soil, 20 to 30 cm thick, and protect the roots to increase the temperature and prevent freezing.
Irrigation heat preservation produces a dry orchard, 10 to 20 days before the occurrence of low-temperature freezing, where conditions permit, open ditch for filling water, during the cooling period canopy spray, with water insulation to reduce freezing damage.
Before the arrival of chemical freeze-thaw temperature, the tree crown was sprayed with paclobutrazol, and the leaf transpiration was reduced to reduce the heat loss of the tree and reduce the degree of frost damage.
Before the arrival of soil freezing and freezing, the land is covered with mulching through cultivation and soil preparation to reduce soil temperature and protect the root system from freezing damage.
Protecting the tree 1. Covering the crown: The entire tree is wrapped in the grass to prevent direct frost damage to the leaves. 2. The trunk is painted white: 5 tons of lime + 10 pounds of water + 0.5 pounds of salt + 0.1 pounds of sulphur + bactericidal agent are used to prepare the whitening agent. In December, the trunk is painted white, and the dry 60 cm is applied. The exposed branches and wounds are also To white, protect the main stem.
Fumigation to increase temperature to watch the weather forecast, use fireweed, chaff, sawdust, etc., set 4 to 6 smoke stacks per acre to ignite and burn fuming smoke before the onset of cold wave or frost, so as to form a smoke screen over the orangery and suppress it. Radiation frost, at the same time, can directly increase the temperature of the orange grove, reduce frost damage.
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