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2. Expand the soil and improve soil and fertility management. Each year, the expansion of soil in the autumn to expand the hole, can be applied to the layer of straw burying, livestock and poultry manure, biogas residue fertilizer, cake fat and so on. The deep soil improvement requirements of the whole park are completed within three years. The amount of basal fertilizer applied per tree per year to expand the hole is not less than 75 kg. Young trees should be topdressed with thin fertilizers and applied from March to August once a month. The quick-acting nitrogen fertilizers should be used, and phosphorus and potash fertilizers should be suitable. After entering the result period, heavy fertilizer is applied and the number of reductions is reduced. From April to May, spraying gibberellin or other protopine at a concentration of 50 mg/L plus 0.2% to 0.3% of potassium dihydrogen phosphate to preserve the fruit. In July and October, strong fruit fertilizer and fruit fertilizer were applied. In case of drought or autumn drought from July to October, drought and drought prevention measures must be taken in time to ensure that the navel orange trees will survive the dry period.
3. In the growing season of navel orange trees, various pests should be controlled in time. Such as citrus canker, scab, resin disease, umbilical yellow disease and other diseases, Citrus red spider, rust wallworm, leaf miner, scale insect, whitefly and other pests.
4. Reasonably trim. Sapling pruning, mainly do a good job shaping, wiping buds and control tips; the results should be good grasp of summer pruning and winter pruning, timely eradication of summer shoots, in mid-July and late spring shoots on the nutrition branches left 5 short cuts, At the same time, the strong branches and falling fruit and fruiting branches were retracted to promote autumn shoots. Due to the strong branching ability of the navel oranges, proper thinning can be carried out at the beginning of the winter in the dense autumn shoots, leaving 2 to 4 robust autumn shoots per branch.
Selenium
is an indispensable trace element to maintain the normal function of
the human body. Selenium deficiency in the human body can lead to
various diseases. Modern scientific research
proves that selenium has anti-oxidation, enhances human immunity,
effectively removes harmful garbage, promotes human health, and delays
aging.
Navel orange high yield cultivation techniques
1. High standards to build the park. To build a garden on a hillside, you must first construct a contoured back-and-aft slope, and then open a trench to apply base fertilizers such as Rice straw, pig manure, phosphate fertilizer, and lime, and require that the amount of basal fertilizer under each planting hole be no less than 100 kg. Plant spacing 3 meters, row spacing 4 meters, planting green manure between rows, planting windbreaks and gardens on the main roads and orchards (appropriate selection of horses).