Before the winter, dragon fruit must strengthen soil, fertilizer, water management and pest control work to enhance the cold resistance of plants to ensure that plants safely overwinter. The specific management technical measures are as follows:
First, fertilization. In the 15-20 days before the winter season, winter fertilizer is applied to produce high-quality organic fertilizers and high-efficiency phosphorus and potassium fertilizers. For trees of more than two years old, each strain of livestock and poultry will produce 8-10 kilograms of human and livestock manure per plant and superphosphate or calcium. Magnesium-phosphate fertilizer 1.5-2 kg, potassium chloride or potassium sulfate 0.50-0.75 kg, 50-60 cm away from pitaya plants, dig deep and 25-30 cm wide around the dragon pit plant, put all the After the fertilizer is fully stirred and mixed, sprinkle the fertilizer in the ditch and cover the soil.
Second, earth. After fertilization, use smashed rot, manure, burnt earth or other miscellaneous fertilizers, or other new soil fertilizers to cultivate 15-20 kilograms per pip in the soil around the roots of pitaya plants. -10 cm, with thick topsoil, fertilizing soil, covering bare root groups, stabilizing and raising soil temperature, and protecting underground roots from winter cold damage.
Third, irrigation. After fertilizing the soil, if the weather is dry, we must fill it with “running horse waterâ€, speed irrigation to prevent water accumulation, or pour 15-20 kilograms of fresh water or biogas slurry into each plant, or pour the decomposed human and animal manure water. It is advisable to completely infiltrate the soil in the soil surrounding the pitaya plant roots, so as to accelerate the dissolution and transformation of the fertilizer, promote root absorption and utilization, increase the effect of fertilization, and promote the rejuvenation of the tree.
Fourth, cover the soil. In the autumn, straw or other weeds are used to cover the soil around the roots of pitaya plants. The grass thickness is 5-6 cm to reduce evaporation of water, prevent moisture loss, keep the soil moist, ensure moisture supply, and prevent plants from losing water. Obviously enhance the plant's ability to resist cold and overwintering.
Fifth, pest control. In the autumn, the roots are showered once 1000 times with 2.8% avermectin, 1000 times 48% chlorpyrifos, 600 times 80% sodium propionate, or 1000 times 0.5% veratrine, 1000 times 4.5% cypermethrin, 800 times 50% The thiophanate-methyl mixed solution was 3-5 kg ​​per plant and evenly poured into the soil around the roots of pitaya plants. It was better to completely infiltrate the soil without influx of water, so as to kill each one that was exterminated in the soil. Underground pests, protect the root system. In addition, spray 1500 times 0.5% phenoxyvir, 1500 times 3.2% avermectin, 800 times 1.8% octamine acetate mixture, or 1500 times 10% thiamethoxam, 1000 times 1.14. % Mawei salt, 600 times 20% copper thiazolyl mixture, evenly wet all stems and leaves, in order to start dropping drops is appropriate to eliminate all the pests adsorbed on the stems and leaves to protect the stems and leaves. In this way, the ability of the plants to resist cold and overwintering can be significantly enhanced, and the plants can be safely overwintered.
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