Technical measures for snow and frost prevention of mulberry, tea and fruit crops

1. Fruit: (1) Citrus: spray steam inhibitor on tree crown before freezing, smoke in garden, improve antifreeze effect. in case of orange freeze injury, timely remove curled freeze dead leaves and dead shoots, bandage snow pressure damaged branch, prune and prune crushed branches, treat wound with wound protector, spray foliar fertilizer in time, strengthen fertilizer and water management, topdressing lightly frozen trees with 0. 5% urea for 2-3 times, and applying thin fertilizer separately for heavy frozen trees for many times. (2)Loquat: cover the tree tray with soil or rice straw for heat preservation; timely apply fertilizer outside the root with 0.2% urea +0.2% potassium dihydrogen sulfate solution or 0.1% carbon black solution to improve cold resistance; adopt bundle treatment, wrap the lower leaves of the flower ear upward, or bundle the big branches together to reduce the damage of the flower ear and young fruit of loquat by cold freezing, and also bag the flower ear to reduce freezing damage.

Second, tea. The tea garden is paved with grass, weeds, straw, pruned branches and the like are covered with the tea garden, and the awning surface can also be covered with a sunshade net, and plastic film or straw and weeds are covered on the sunshade net to improve the anti-freezing effect. The tea garden with light freezing injury degree and original good picking surface shall be lightly pruned and cleaned to facilitate tea bud germination. The pruning degree shall be light rather than deep, and the picking surface shall be kept as far as possible; the tea garden with heavy damage shall be deeply pruned or heavily pruned or even mowed. At the same time, timely spraying foliar fertilizer, in order to restore tea vitality and tea bud germination and promote the growth of new shoots; culture crown. After light pruning tea tree, spring tea picking should leave 1 big leaf, summer, autumn tea is picked according to the routine, in order to help raise the crown, but also can pick more high-grade famous tea.