This technology is suitable for the annual cultivation technology reference of winter date.
Fertilizer management Winter jujube has a higher demand for phosphate fertilizer. When planting, it can apply 0.5 kg of superphosphate and 25 kg of organic fertilizer. Every year in late May, late June, early July and early August, fertilizers are applied one at a time. The fall ditch applies organic fertilizer, applying 50 to 70 kilograms of farmyard manure and 0.5 to 1 kilogram of nitrogen and phosphorus fertilizer or the same amount of three-element compound fertilizer. Before jujube sprouting, before flowering, before fruiting, and during overwintering, they were irrigated once a year, and other times were properly watered depending on drought conditions. Drainage was timely during the rainy season, and cultivating and weeding were performed promptly after the rain. Plowing tree trays in autumn.
Flower and fruit management First, in the early flowering date Zaotou topping, according to the strength of growth, leaving 3 to 5 secondary branches topping. The second is to spray water, spraying clean water from the beginning of the flowering stage to the full flowering period every 1 to 3 days, for a total of 3 to 5 sprays. The third is the ring cut, the main Wang Wanshu in the flowering period of the main ring cut, after the ring cut smear cationic active agent "promoting Huawang No. 2" to promote flower and fruit protection.
Plastic trim. The jujube tree shape should adopt a small crown, sparse layer shape, maintain ventilation and light transmission, planting and setting height of 70 to 80 cm, and cultivate 5 to 6 main branches year by year. In the winter and summer cuts, the leggy shoots shall be removed promptly, the branches shall be extended shortly, and the dense branches and thin and weak branches shall be cut in order to maintain the balance of the tree vigor, keep the crowns airy and transparent, and timely retract the lengthy branches. Make local branches update and rejuvenate. After trimming, special attention should be paid to the protection of the wound, smearing the fat “anti-corrosion filmâ€, closing the wound and protecting it from healing.
Diseases and pests control Jujube pests and diseases mainly include leafhoppers, peach borerworms, jujube buckwheat, date rust, jujube shrinkage, jujube worm disease and so on. Germination leaf spray 40% omethoate EC 1000 times 1 or 2 times to prevent jujube step. From late May to early June, spraying 15% of broom and 2500 times of 25% of EC on the stage of leaf blast, and 2 to 3 times of spraying of pyrethrin pesticides from the middle of July to mid-August. . In July, August and September, a fungicide is sprayed every 15 to 20 days. 200 times or Bordeaux mixture can be used alternately with carbendazim 800 times solution or thiophanate-methyl wettable powder 1000 times to prevent and control jujube rust and shrinkage. Fruit disease, when spraying can be added "new high fat film" to prevent pests produce drug resistance, and can make the drug efficiency. Juvenile bronchitis was found, light cut off diseased branches, and severe cases were promptly removed. Do not tolerate it.
Qingyuan anti-freeze should clean the debris in the jujube garden and bring it out of the field for centralized destruction; scrape the lesions and apply “general to protect the trees†to quickly remove the lesions, combine pruning, cut off the diseased branches and pests. In particular, it is necessary to remove pathogens such as stubble left over from the eradication of buds and overwintering parts of the eggs, and then spray the “General Tree Guard†in the whole garden to sterilize and reduce the base number of overwintering pests and diseases. Prior to spraying, weeds should be removed from the environment and on roadsides and ditches, and drained water should be drained away to create environmental conditions that are not conducive to the survival of pests and diseases. Oil smoke point meter, soil pH meter, soil moisture meter.
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