First, the type of fertilizer in orchard and its role
1. Nitrogen fertilizer
Nitrogen fertilizer can promote vegetative growth, delay aging, improve photosynthetic efficiency, enhance quality and increase yield. In the absence of nitrogen, the fruit is seriously damaged, the flower buds are poorly differentiated, and the tree is weak; if the nitrogen is too much, the branches are long, the fruit is serious, and the resistance is poor.
2. Phosphate fertilizer
Phosphorus can enhance the vitality of fruit trees, promote flower bud differentiation, fruit development and seed maturation and enhance quality; can improve the absorption capacity of roots, promote the occurrence and growth of new roots; improve the ability of fruit trees to resist cold and drought. Insufficient phosphorus delayed the flowering phenology of fruit trees, and the growth of new shoots and fine roots was weakened; the leaves were small, the leaves were dark green to bronze, and the veins were purple-red.
3. Potash
Appropriate amount of potassium can promote fruit hypertrophy and maturation, promote sugar conversion and transportation, improve fruit quality and storability; and promote thick growth, tissue maturation, developed mechanical organization, improve cold resistance, drought resistance, high temperature resistance and disease resistance The ability of the worm. Insufficient potassium, blocked protein synthesis, reduced disease resistance, poor dermis, easy to crack fruit, poor coloration, low sugar content, sour taste, reduced quality and yield; lack of potassium, new shoots, top tips, delayed leaves. When the potassium is excessive, the flesh is soft and the storability is lowered; the cold resistance of the branches is reduced. Note that the potassium fertilizer should be potassium sulfate compound fertilizer, and the potassium chloride compound fertilizer should not be applied.
4. Calcium fertilizer
Calcium plays a role in balancing physiological activity in fruit trees. Appropriate amount of calcium can alleviate the toxic effects of potassium, sodium and aluminum in the soil and promote the growth and development of fruit trees.
5. magnesium
Appropriate amount of magnesium can promote fruit hypertrophy and improve quality. Magnesium deficiency presents chlorosis, and the leaves of the new shoots fall off early.
6. boron
Boron can promote pollen germination and pollen tube growth, increase vitamin and sugar content, improve quality, and improve oxygen supply to roots and promote root development. In the absence of boron, the growth point is withered, the leaves are yellowed, the small leaves of the branches are clustered, the soft tissue is browned, and the flesh is corked.
7. Zinc
Zinc is an integral part of the enzyme. In the absence of zinc, the leaves and leaves stop growing or shrink, and the lower leaves of the branches often have streaks or yellowing parts; the tops of the new shoots are narrow, the internodes are short, and the small leaves are clumped.
8. Organic Fertilizer
Organic fertilizer refers to green manure, poultry manure and the like. Organic fertilizer can increase soil porosity, loosen soil, accelerate soil fertility, and facilitate microbial activities.
Second, fertilization time
1. Fruit tree needs fertilizer
The fruit tree needs to be fat related to the phenological period. In general, the phenological period of fruit trees is divided into flowering stage, young fruit stage and late fruit growth stage; it can also be divided into vegetative growth stage, reproductive growth stage and dormancy stage. During the development of the annual cycle of fruit trees, nitrogen is the main stage in the early stage, and potassium is the main stage in the middle and late stages. The absorption of phosphorus is relatively stable throughout the growing season. The early flowering fruit setting, young fruit development and growth require a large amount of nitrogen, flower bud differentiation and fruit expansion period, the potassium requirement increases, and reaches a peak during the rapid expansion of the fruit.
2. Fertilization time
(1) The base fertilizer is generally applied in autumn, and the base fertilizer in autumn is the second or third growth peak of the root, and the root is easy to heal. Cutting the fine root can play a role in root pruning and promote new roots. Adding appropriate amount of nitrogen fertilizer during fertilization can improve the nutrient level of the tree and improve the quality of the flower bud. In the autumn, the basic fertilizer should not be too much for the nitrogen fertilizer, so as to prevent the winter shoots from being damaged by wintering. The amount applied is 20% of nitrogen for the whole year, 20% of phosphorus, and 20% of potassium. The base fertilizer can also be applied in winter, and the base fertilizer is generally combined with the deep-turning soil in winter.
(2) Topdressing and topdressing are not only the strong trees, high-yield and high-quality fertilizers of the year, but also lay the foundation for the growth results in the coming year.
1 Before the flower, the germination and flowering of the fruit tree consumes a lot of nutrients. If the tree has low nutrient level, it will cause a lot of falling flowers and fruit and affect the vegetative growth. Increasing the amount of fertilizer can promote the germination and flowering, improve the fruit setting rate and promote vegetative growth. The amount applied is 50% of nitrogen for the whole year and 30% of phosphorus.
2 After flowering, the young fruit is swollen after the flowering and the growth of the new shoots requires nitrogen nutrition. At this time, the topdressing is mainly based on nitrogen fertilizer. The amount applied is 30% of nitrogen for the whole year, 30% of phosphorus, and 40% of potassium.
3 Fruit enlargement and flower bud differentiation stage Some new shoots stopped growing in this period, and flower buds began to differentiate. Topdressing can promote nutrient accumulation, which is beneficial to fruit hypertrophy and flower bud differentiation. At this time, the topdressing is mainly based on potassium fertilizer, and nitrogen fertilizer is generally not applied. The amount applied is 20% of phosphorus in the whole year and 40% of potassium.
4 The fruit growth stage can be combined with the autumn or winter base fertilizer.
(3) Foliar spray fertilizer 4 times - 5 times a year, 2 times in the early growth stage, mainly nitrogen fertilizer; 2 times - 3 times in the later stage, mainly potassium fertilizer. Commonly used fertilizers and concentrations: urea 0.3% -0.5%, potassium dihydrogen phosphate 0.2% -0.3%, borax 0.1% -0.3%. The last foliar spray was carried out 20 days before the fruit harvest period.
3. Fertilization amount
(1) The amount of fertilizer required for organic fertilizer is determined according to the tree species. For example, grape, kiwi and pomelo require a large amount of organic fertilizer, and generally 50-100 kg per plant per year (young trees can be appropriately reduced). Deciduous fruit trees require 30-50 kg of organic fertilizer per plant per year.
(2) Inorganic fertilizer
The unfruited tree and the initial result tree can be applied with 45% potassium sulfate compound fertilizer 0.3-1.0 kg per plant per year; in the fruit-bearing period, 4-5 kg ​​of potassium sulfate compound fertilizer can be applied per plant per year.
Generally, the amount of fertilization can be determined by applying 0.94 kg of pure nitrogen, 0.77 kg of pure phosphorus and 1.2 kg of pure potassium per 100 kg of product produced. According to the soil type of the orchard, trace elements such as calcium, boron and zinc can be appropriately added.
(Water Dan)
[Brightness Upgrade]Compared with the T6, our Led Flashlight brightness has increased by 20% and the illumination distance has increased by 50%. Being made by the world famous CREE Advanced Wick Chip L2, our flashlights can easily light up an entire room or focus in on objects up to 1800 feet away in the dark.
[Power Upgrade]The rechargeable flashlight uses the latest 18650 battery (battery included), USB charging, can be used for more than 6 hours after being fully charged. Our battery has been certified so that you do not have to worry about safety issues.
[2-in-1 Upgrade]To use it with ease, we combine far-light and short-light in one mode, compared with the zoomable, the 2-in-1 is brighter and further, effortless one-handed operation to get bright and long shot light whenever you need it, ideal for use around the house, dog walking, camping.
[5 Modes and Waterproof]The flashlight has 5 useful settings: high / medium / low / Strobe/ SOS. In addition, thanks to the anti-slip ring at the tail, the flashlight is IP65 waterproof and can withstand most extreme weather such as storms and heavy rain.
[Super Durable & Secure]Because of aluminum alloy, it is so powerful that it can be used to prevent disasters and other undesirable conditions. Multiple certifications (FCC, CE, RoHS) and customer service support provided, an ideal gift for your friends and family.
Best Rechargeable Flashlight,Rechargeable Torch Light,Rechargeable Head Torch,Rechargeable Tactical Flashlight
Ningbo Wason Lighting Technology Co.,Ltd , https://www.wasonlights.com