Gongzao is an excellent jujube variety selected by the Chinese Academy of Forestry. It has an average fruit weight of 46 grams and a maximum fruit weight of 70 grams. It is known as "King of the Date". The jujube is suitable for planting in most areas of our province and has very promising prospects. The technique for planting tribute dates in the ocean is described below. Planting time The time for the cultivation of sea cucumbers and trivial jujubes is longer. In general, the province can be planted from late November to mid-December, or in mid-March, when the jujube trees have not yet been planted. Before digging pits and planting tributaries, digging pits shall be planted at a certain spacing. The planting pits are generally 2 meters apart, with a row spacing of 3 meters and about 110 plantings per acre. The planting pits were dug into round shapes. In the tidal flats, the depth of the colonization pits was generally about 40 cm. In each pit, put about 15 kg of pig manure or other decomposed organic manure and 0.5 kg of per-phosphorus calcium (the soil of the seabed is low in phosphorus, apply more phosphate fertilizer, generally 0.25 kg of soil), and add a little topsoil to mix evenly. Then cover it with a layer of 5–10 cm thick soil. At this time, the depth of the planting pit is about 10 cm in order to be used for planting (on other soils, the pits after soiling should be kept slightly deeper, generally about 20 cm). When planting and planting, the jujube seedlings are placed in the planting pit and the root system is stretched, and then filled with soil. When filling the planting pit to a depth of 6-8 cm, lift the sapling upwards gently so that the root system is down. At this time, carry out the first time. Then use the subsoil to seal the pit and make a small tree plate. , We perform the second time practically. Fully add water and cover soil to reduce the evaporation of water in the pit. It is worth noting that the jujube grafting interface must be exposed on the ground when planting. Fertilizer basal fertilizer is usually applied during the dormancy period from November of the same year to March of the following year. The slow decomposition of farmyard manure is mainly used. There are commonly used pig manure, fermented rapeseed cake, etc. The quantity is due to soil fertility, the size of the crown And tree strengths vary. Generally every jujube tree in the young age of basal fertilizer 5-10 kg, adult jujube can be applied 15-20 kg. When applying basal fertilizer, it is best to add 0.5-1 kg of compound fertilizer. There are three main stages for compiling top-dressing dates: First, during the branching period, each jujube tree is treated with 0.1 kg of urea and 0.5 kg of superphosphate (usually 0.3 kg of soil) to promote the formation of shoots, leaves, and buds; In the early fruit stage, 0.2 kg of urea and 0.5 kg of compound fertilizer were applied to each plant; the third was fruit swelling, 0.5 kg of compound fertilizer per plant and 1 kg of superphosphate (0.5 kg of soil in general). The specific dosage of all kinds of fertilizers is appropriately increased or decreased depending on the size of jujube tree. At the same time, the fertilization capacity of the sea-coating soil is poor, and it can be increased by 1 or 2 times during the top-dressing period, but the amount of fertilizer should not be too large. In addition, in the first two years of transplanting, the amount of urea should not be too high to avoid damaging the roots. Common fertilization methods include fertilization, circular fertilization, and extra-root fertilizer. The specific method used should be based on the actual situation. 1 Trench fertilization: Ditch the depth of about 15 centimeters (general soil about 20 centimeters) on both sides of the juniper tree canopy project, and apply the decomposition of the fertilizer. 2 circular fertilization: in the periphery of the crown projection, dig around the jujube tree ring groove, about 10 centimeters deep and wide (usually about 20 centimeters of soil), apply fertilizer, and then seal the soil. 3 outside the top dressing: can be combined with pest control, the jujube tree in the liquid required for the elements, from July to August in the expansion period of the jujube fruit to the foliage. This fertilization method has a high utilization rate of fertilizers, and has a fast and convenient fertilizer effect. China Agricultural Network Editor
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