Under normal circumstances, the amount of nitrogen fertilizer applied per plant per year is 0.25~0.50 kg for pure nitrogen, 0.5~1.0 kg for initial fruit trees, 1.0~1.5 kg for early fruit trees, and 1.5~2.0 kg for fruit trees. The application time and amount of use depend on the tree potential. For the prosperous tree, the time of application is from late May to early June. At this time, the spring shoots stop growing, and the appropriate amount of ammonium nitrogen fertilizer is applied to help the physiological differentiation of the flower buds. At the same time, a certain amount of phosphorus and potassium fertilizers are applied, and the other is applied in a large amount in the middle and late August, when the autumn shoots stop growing. On the basis of phosphorus and potassium fertilizer, moderate nitrogen supplementation should be applied to the amount of nitrogen fertilizer applied. If the amount of organic fertilizer applied is large, nitrogen fertilizer should not be applied or extended (1/4~1/5 of the above dosage). . For the weaker apple trees, the nitrogen fertilizer should be applied before the prolonged period, especially the nitrate nitrogen fertilizer. Before the apple tree sprouts, a certain amount of nitrogen fertilizer should be applied, and combined with watering and peritoneum, the rain can be chased in the summer. In order to promote the growth of autumn shoots, restore the tree. Table Lamp
A sophisticated take on an industrial design, LEDER technology`s table lamp lends a touch of buttoned-up appeal to your room's aesthetic. Made from iron in a handsome matte black finish, this charming design showcases a tubular metal body, a chunky circle pedestal base, and an exposed finial bulb ensconced in a clean-cut cylindrical clear glass shade.
Add this alluring lamp to your nightstand or desk to illuminate your late-night work sessions in a warm glow.While this table lamp thrives in a coastal setting, its versatility allows it to fit almost any area.A classic glass lamp with a modern shape, this piece will add both light and style to a variety of rooms. There is no doubt that it is an indispensable part of your modern home design.
Features:
• Elegant design
• The price is appropriate
• Full of exotic flavor
• Energy saving save electricity
• Easily installed and serviced
• Color temperature :3000k-6000K
• Super practicability
• Type of protection: IP20
• Warranty for bulbs :2 years
Simple and elegant, a pair of cute little table lamps can definitely be integrated into any home decoration, practical and add a sense of design to your room.The smaller scale of this classic double-gourd table lamp makes it the perfect fashionable and functional accent for a console table or nightstand. When you first see this product, you can realize its elegance, fashion charm, and beauty.
We have rich production experience in lighting.Except Decoration Lighting , we also offered other product in Indoor Lighting .Such as :
LED Panel Light , Track Light , Linear Light ,Wall Light , LED Strip Light , LED Tube Light , Cabinet Light , LED Bulb , LED Ceiling Light as so on .
Led Table Lamp,Rose Gold Lamp,Cordless Table Lamps,Bed Table Lamp JIANGMEN LEDERLIGHT LIGHTING Co.,LTD , https://www.ledlightoutdoor.com
Apple fertilizer characteristics
(1) Apple's environmental requirements
Apple is a cold-tolerant tree species in deciduous fruit trees. It is mainly distributed in vast areas north of the Yangtze River in China. The most suitable cultivation temperature is 9~14°C per year, and the average temperature in the coldest month is between -10~10°C. In the range of 10~20°C during the growth period from April to October, the average temperature is 6~. It can be cultivated between 17 °C. Therefore, the temperature conditions in many parts of China can fully meet the growth and development of apple trees.
It is generally believed that between 500 and 800 mm of annual rainfall is a suitable area for apple cultivation, while most of the apple production areas in western China have a rainfall of less than 400 mm, the climate is dry, and apple cultivation must rely on irrigation.
Apple trees are hi-light fruit trees. The length and intensity of sunshine have a direct impact on the coloration and quality of apple fruit. Generally, the annual sunshine is beneficial to the flower bud differentiation and fruit development of apples between 2200 and 2700 hours. Large temperature difference between day and night, sufficient light is conducive to the accumulation of sugar in the fruit, increase the content of vitamins and the coloration of apple fruit.
If the apple producing area is flat, the soil layer is deep, the drainage is good, and the soil organic matter content is high, it is beneficial to the growth and development of apple.
(2) Nutritional characteristics of apples
Apple is a perennial woody plant with woody plants and its own nutritional characteristics:
1. Apple's tree has the characteristics of storage nutrition
The amount of nutrients stored in the apple tree in the previous year directly affected the nutritional status of the fruit tree, affecting the flower bud differentiation and growth of the fruit tree, and the amount of nutrients stored in the same year directly affected the growth and flowering results of the fruit tree in the next year.
The study of apple nitrogen nutrition showed that the fastest growth period of nitrogen content in apple canopy was the first few weeks after spring germination, and it was also the growth period of new shoots: the supply of nitrogen in this period mainly came from storage in trees. Nutrition, this part of the storage nutrients is that the fruit trees are hydrolyzed into proteins in the leaves before the leaves are transformed into simple nitrogen-containing compounds, which are transported to the cortex of branches, trunks and roots, and then stored and stored, and stored as fruit trees in the early years of new growth. Source of nutrients. Therefore, the vegetative growth of apple trees in the first few weeks after germination depends mainly on the status of nutrients such as nitrogen stored in the trees. In the autumn, apples and other nutrients such as nitrogen are added in time to help promote growth and development in the coming year.
2. Apple's characteristics of nutrient demand
Apple trees of different ages have different fertilizer requirements. The apple saplings are dominated by long trees - expanding the crowns and framing the skeleton, and then gradually transitioning to the results. Due to the different requirements of each period, Apple's demand for nutrients varies. The main nutrients needed for apple saplings are nitrogen and phosphorus, especially phosphorus, which has a good effect on the growth and development of plant roots. Establishing a good root structure is a prerequisite for a good, robust and long-lasting apple canopy. The demand for nutrients in adult fruit trees is mainly nitrogen and potassium, especially because the fruit harvest takes away a lot of nutrients such as nitrogen and potassium. If it is not added in time, it will seriously affect the growth and yield of apple in the coming year.
In the first fruit of apple saplings, the results of the middle and long branches are the main ones. When the fruit is in the fruiting stage, the results are mainly the short fruit branches. In the growth of fruit trees, the parts of the fruit age increase with the increase of the age, and the demand for nutrients The quantity and proportion have also changed a lot.
The flower buds of apples were differentiated in the late autumn of the previous year, and the development of the fruit was completed in the same year. The whole process takes two years. Therefore, it is necessary to pay attention to the mutual balance and vegetative growth of apple vegetative growth and reproductive growth. Balance with fruit development.
In addition, the root system of apple is relatively developed, and the root system is mostly concentrated below 20 cm, which can absorb the water and nutrients in the deep soil. In order to improve the nutritional status of apple, it is necessary to pay attention to the improvement of deep soil and fertilization.
Apple fertilizer characteristics and fertilization techniques
Apple is one of the most widely cultivated fruit trees in China. From the production characteristics of apples, it has strong adaptability, good yield, long cycle of results, variety, and storage and transportation. If you use more advanced storage methods, you can supply the market on an annual basis. In addition, apple has high nutritional value, rich in sugar, starch, ascorbic acid, fat, protein, pectin, carotene, niacin, calcium, magnesium, zinc and other nutrients.
3. The rootstock and scion of apple also have a certain influence on the nutrient absorption of apple trees.
In recent years, dwarf rootstocks and short-branched varieties have been used in the cultivation of apples at home and abroad. Due to the different rootstocks, types of scions and cultivation methods, the demand and absorption of nutrients are also greatly affected.
Studies have shown that the rootstock type not only affects the tree potential of apple trees, but also has a significant impact on the absorption of nutrients. For example, an apple tree using a mountain stator as a rootstock is more prone to iron deficiency yellowing on calcareous soil. Therefore, due to the nutritional characteristics of the rootstock, the ability of apples to adapt to the environment is also quite different, and the ability to absorb nutrients is also different. According to foreign data, the rootstock M9 can increase nitrogen, calcium, magnesium and iron in apple leaves. The content of boron, while reducing the content of phosphorus, potassium, sodium and other elements in the leaves, should cause great concern in production.
Apple fertilization technology
(1) Applying more organic fertilizer
Organic fertilizers not only contain various nutrients needed for the growth of fruit trees, but also have a good effect in many other aspects.
(1) Organic fertilizer contains not only all kinds of essential nutrients needed for apple growth and development, although the content is lower than that of chemical fertilizers, but the variety is full, which not only contains a lot of nutrients such as nitrogen, phosphorus, potassium and calcium, which are needed for fruit tree growth. Magnesium, sulfur, etc., also contain trace elements such as zinc, iron, B, manganese, etc. required for vegetative growth of fruit trees. It plays a very important role in coordinating the supply of various nutrient elements. At the same time, organic fertilizer is relatively slow in the supply of nutrients, and it is generally not easy to cause fat damage and it is not easy to appear fattening in a long-term and balanced growth.
(2) Organic fertilizer can significantly improve the physical properties of the soil. Tests have shown that the organic fertilizer is mixed with the soil. The organic matter in the organic fertilizer and the solid particles in the soil cross each other to form a soil structure with a good effect. The formation of agglomerate structure can reduce the adhesion between soil particles by 2 to 6 times and the adhesion by 60%, which not only makes the orchard's farming operation more labor-saving, but also can greatly reduce the growth resistance of roots and contribute to the extension of root system. And the absorption and utilization of nutrients.
(3) Organic fertilizer can increase the buffering capacity of soil to nutrients, reduce fertilizer damage and improve fertilizer efficiency. Organic substances in organic fertilizers can produce large amounts of organic acids and humic acids during decomposition. These acidic substances not only promote the release of essential nutrients such as phosphorus, iron and zinc contained in the soil, but also combine with the applied urea, ammonium hydrogencarbonate, etc., and adsorb it to the surface of these acidic substances. The concentration of ammonium ions in the soil solution can prevent the ammonium ammonium poisoning which is more likely to occur when a large amount of ammonium nitrogen fertilizer is applied; at the same time, the volatilization and leaching loss of the nitrogen fertilizer are reduced. The adsorbed fixed nitrogen fertilizer can be continuously released during the growth process of the apple tree, and is uniformly supplied to the fruit trees for absorption and utilization; not only improves the fertilizer efficiency, but also coordinates the nutrient supply of the soil.
(4) Dark matter contained in organic fertilizer can increase the absorption of solar energy by the soil and help to improve the ground temperature in early spring. The roots of apple trees can withstand a certain low temperature. Generally, the soil temperature starts to absorb nutrients at around 5 °C, but the rate and capacity of nutrient absorption increase gradually with the increase of ground temperature. When the temperature reaches 30 °C, there is a maximum value. It began to decline gradually. When the upper part of the early spring fruit tree has not been grown in a large amount, the sunlight can be irradiated to the surface in a large amount. The soil with organic fertilizer is darker in color, the solar energy is absorbed more, the ground temperature rises faster, and the root activity can be promoted and absorbed more. Some nutrients are used after the germination of the tree to promote the growth and development of apples.
(5) The use of organic fertilizer to form agglomerate structure increases soil air content and enhances root respiration, which promotes active absorption of nutrients; at the same time, larger soil pores can better absorb rainfall and convert rainwater into soil water preservation. It not only prevents soil erosion, but also reduces the number of irrigations. Many of the decomposition products produced by the organic matter contained in organic fertilizer have certain physiological activities, which can stimulate root growth and improve the absorption capacity of roots.
(2) The amount of nitrogen fertilizer should be appropriate
Nitrogen is one of the nutrients required for apple trees. It absorbs about 0.3 kilograms of pure nitrogen per 100 kilograms of fruit produced. The use of nitrogen fertilizer has a great impact on the yield of apples. In a certain range, the nitrogen fertilizer should be appropriately increased, and the number of branches and leaves can be increased to enhance the tree potential and increase the yield. However, if too much nitrogen fertilizer is applied, it will cause the tree shoots to not only cause the fruit set rate to decrease, the yield to decrease, but also the quality and storage resistance are worse, which may lead to the occurrence of bitter pox disease, red jade spot disease, fruit rust and other physiological diseases.
Total 1 | <First <Prev 1 Next> Last> |
share to: