Apple Fertilizer Characteristics and Balanced Fertilization Technology
Stainless steel Basin Faucet is a faucet made of stainless steel. Stainless steel is a healthy material, without lead, acid, alkali, corrosion resistance, does not release harmful substances, can ensure human health and hygiene. Stainless steel basin faucets are safe and lead-free, with no corrosion, exudate, or odor or cloudiness issues. It will not cause secondary pollution to the water quality, keep the water quality pure and hygienic, and fully guarantee the health and safety. Field corrosion test data show that stainless steel has a service life of up to 100 years and requires almost no maintenance during the life cycle, avoiding the cost and trouble of faucet replacement and low operating costs. Achieve the same service life of the stainless steel basin faucet as the construction. Stainless Steel Basin Faucets,Waterfall Bathroom Faucet Black,Modern Basin Faucets Designs,Minimalist hand washing faucet Kaiping Jenor Sanitary Ware Co., Ltd , https://www.jmjenorsanitary.com
Apple needs thirteen mineral nutrients. Nitrogen, phosphorus and potassium are three essential nutrients necessary for the growth and development of fruit trees. Calcium, magnesium and sulfur are the medium elements of apple development. Boron, iron, zinc, copper, manganese, molybdenum and chlorine are closely related to growth and development. Trace elements. Excessive or too little of these 13 elements will affect the normal growth and development of apples, and they have an irreplaceable role. Production is often easy to lack and needs to be supplemented. In addition to a large amount of elemental NPK, the medium amount of calcium and magnesium also needs to be supplemented, especially calcium, which is an important element to be added after apple bagging. Trace elements are mainly concerned with the supplement of boron, zinc and iron. Because they are trace elements, they are not enough. If they are too much, it is necessary to master the amount of supplement and the way of supplement.
The amount of nutrients that apple trees need to supplement during the whole annual growth process is different, so fertilization should grasp the scientific application in the critical period. The demand for nitrogen is the largest in the early growth period, the new shoot growth, Citi and young fruit. The growth requires a large amount of nitrogen. The nitrogen required for this period is mainly derived from the storage nutrients of the tree. Therefore, it is very important to increase the storage nutrients of nitrogen. After the end of June, the nitrogen requirement is reduced. If there is too much nitrogen in July and August, It will inevitably lead to a long autumn, affecting flower bud differentiation and fruit enlargement. Before receiving dormancy, it is the peak of re-growth of the root system, and it is also the storage period of nitrogen nutrition. The demand for nitrogen fertilizer has obviously increased, and the absorption of phosphorus is rapidly increased in the initial stage of growth, and the flowering period reaches the peak of absorption. It has remained at a high level since then, and there is no significant change until the late growth stage. The demand for potassium in the tree is as low as before, high and low, that is, the demand for flowering is small, and gradually increases in the later period. It reaches the peak in the fruit expansion period in August and gradually decreases in the later period. Calcium reaches the peak of absorption in the young fruit stage of apples, accounting for 70% of the whole year. Therefore, supplementing enough calcium in the young fruit stage is crucial for fruit growth and development. The demand for magnesium in apples gradually increases with the growth of leaves and remains at a high level. Boron is the most demanded during flowering, followed by young fruit and fruit expansion. Therefore, flowering period is a key period, which can increase the fruit setting rate and increase the quality fruit rate. Zinc is most needed during germination and must be replenished before germination.
2. At present, the apple orchard has outstanding problems due to improper fertilization and management measures.
The application of too much physiological acid fertilizer for several years causes serious acidification of the soil, which leads to a decrease in water-soluble calcium in the soil, and the availability of nutrients such as nitrogen, phosphorus, potassium, magnesium and boron is reduced, and the average utilization rate of fertilizer is significantly reduced, while soil acidification is further Can produce more manganese ions, and even cause "manganese poisoning."
Excessive application of inferior chemical fertilizers for 2 years can cause excessive inorganic salts in the soil, which makes the osmotic pressure of the soil solution too high, affecting the absorption of nutrients and water by the roots, causing soil salinization and redness, which is the fruit tree can not grow normally.
3 Imbalance of nutrients in the soil due to improper fertilization If the application of excessive fertilizers such as NPK application of excessive organic fertilizer often results in the lack of calcium, magnesium, zinc and boron.
The effect of 4 ring stripping is to keep the organic nutrients produced by the leaves in the tree part at a certain stage and not to the roots. This controls the tree potential and increases the amount of flowers. But the consequence is that a large amount of absorbed roots die due to hunger. It directly affects the absorption of nutrients and water by roots and is also one of the important causes of deficiency.
3. How to achieve balanced fertilization
Balanced fertilization is based on the characteristics of tree fertilizer requirements, soil nutrient content and target yield requirements. The organic fertilizer, NPK and medium and trace elements are selected according to the scientific proportion and quantity to optimize the fertilization method. One meets the crop's optimal demand for various nutrients.
At present, we can't accurately test large areas of soil and tree nutrients, and combine the various elements according to the test results, and timely replenish them to crops. We can only sum up according to years of production practice. The fertilization experience of high-yield and high-quality orchards continues to improve and improve the fertilization program, and strives to balance the nutrients needed by the tree in various ways to meet the demand for various nutrients in the production of high-yield and high-quality fruits.
Specifically, four combinations are needed, namely, the combination of base fertilizer and topdressing, NPK combined with medium and trace elements, and soil fertilization combined with foliar fertilizer.
Base fertilizer refers to the soil digging and fertilizing after harvesting or before germination, generally about 75% of the amount of fertilizer used throughout the year. There is also a method of "one shot", which has also achieved very good results. “A shellingâ€, as its name suggests, is to apply the amount of fertilizer all year round to the soil, and no longer apply fertilizer during the whole growing season. The “one shelling†fertilization method should have certain conditions: First, the soil water and fertilizer capacity should be strong; Second, the amount of fertilizer should be sufficient; third, it is best not to engage in ring stripping.
The base fertilizer is the focus of fertilization throughout the year. The formula must be reasonable. That is, the organic fertilizer, the high-quality compound fertilizer and the medium and trace elements are properly matched, so that the nutrient balance of the fruit trees is balanced. Secondly, the quantity should be sufficient to make the fruit trees full, not full and full, and the amount of fertilizer should be 10%-15% of the yield per mu. In addition, the fertilization method should be scientific, and the annular groove should be dug in the young age. The width of the ditch is 30 cm and the depth is 30 cm. As a result, the large tree excavates the radial ditch and excavates 6-8 radial grooves in the radius of one-half of the radius of the canopy. The shallow outer depth, the inner narrow and the outer width, the depth is 20-40 cm, the fertilizer and the soil should be fully stirred evenly, and the application after harvesting is better than the early spring.
Topdressing is mainly applied in July and August. You can dig pits with high-quality high-potassium compound fertilizer in early July, or you can apply high-quality high-potassium water for fertilizer in early July and early August.
Organic fertilizer should be applied once in the case of soil-based fertilizer. Farmers' organic fertilizer must be fully decomposed. Commercial organic fertilizer should account for 40%-50% of total fertilizer input.
Foliar fertilizer has unique advantages that are both convenient and efficient. For example, before germination, zinc supplementation before germination and bagging before bagging, calcium supplementation, nitrogen supplementation, and potassium supplementation in the early stage of growth can play a very good effect in preventing physiological diseases, improving fruit set, promoting flower formation, enhancing photosynthesis, and improving fruit quality.