Calcium deficiency in apples must be supplemented in real time

In recent years, Apple's bitter pits, scabs, water mustards, and molting have become more and more severe. In particular, the years before the harvest have encountered prolonged periods of prolonged rain, red dots, spots, and black lice have become more widespread and seriously affected. Apple's commodity value. The reasons for this are all due to a serious calcium deficiency or mental illness caused by weather conditions affecting the transport of calcium.

1, the symptoms of calcium deficiency in apple Late formation of bitter pit disease, subcutaneous sponge was not erosion. The red spots and spots formed before harvesting should be differentiated as infestation diseases or psychological diseases. Red spots and spots formed by infective diseases are rapidly expanded and deeply pulped and smashed. The red dots and spots that are formed by calcium deficiency shrink the depression into black pods and do not rot, also known as bitter pit disease. Using a knife to cut away the epidermis, if it is sponge-like under the skin, it is equal to the symptoms of calcium deficiency caused by fruit swelling. If the subcutaneous flesh is normal, it is equal to the calcium deficiency symptoms that the fruit matures. Calcium-deprived apples will disappear because of the cell-cell adhesion and the cell wall and gelatinous layer will become soft and the cells will be broken. Not only will the symptoms of calcium deficiency appear before harvesting, but it will also cause bitter pits, water mustard, and dehydration during storage. The skin becomes soft and other symptoms.

2. The cause of calcium deficiency is due to a severe calcium deficiency in the soil; second, it affects calcium transport due to weather conditions. 1. The movement of calcium ions in plants is slow, and calcium supplementation from the soil is a very slow process. The transportation of calcium in the xylem is dependent on the transpiration of the leaves, and the mature leaves have a strong transpiration and calcium is rich and thick. The apical shoots, weak shoots, and branches with poor luminosity in the inner and lower layers were less prone to transpiration and less calcium. The transport of calcium in the bast is very weak, and the calcium in the mature leaves cannot be reused by the young leaves, root tips, branch development points and fruits. Therefore, the apple plant calcium deficiency, first reflected in the root tip, the development point, the regeneration of young leaves and fruit on the organization, which is the reason for the formation of apple calcium deficiency. 2. Looking back at historical records and the fact that calcium deficiency symptoms have occurred in recent years, the internal cause of calcium deficiency in fruit trees is caused by the following reasons: 1 Fertilizers are fertilized by permanent fertilizers, and the useful states and trace elements in the soil are depleted and have become severely deficient in calcium. Two years of application of nitrogen fertilizer or phosphate fertilizer, potassium fertilizer, restraint on the absorption of calcium. 3 Severe drought, the soil moisture content decreased to 50% or less of the maximum soil moisture, and the wilting of leaves was weakened, affecting the transport of calcium. 4 water accumulation, depletion of calcium and other elements will simultaneously arise. 5 Before harvesting, the fruit is agile and expansive, and there is no light for prolonged periods of cloudy rain. It affects the transport of calcium and causes severe red spots, spots, and black lice.

3. Prevention and treatment of calcium deficiency disorders 1. Get out of the fertilizer misunderstanding, autumn basal fertilizer, mainly farmyard manure, good inorganic fertilizer, with 30-40 kilograms of silicon-calcium fertilizer per acre (such as calcium magnesium phosphate fertilizer, superphosphate, etc.). Through the process of adding soil inorganic matter, microelements and fertilizing fertility, the calcium content in the soil is improved. Due to the slow transport of calcium ions in the tree, it was not effective in the past. However, maintaining a certain number of years is a certain way to deal with calcium deficiency from root trees: 2. Soil calcium. In March, the roots developed for the first time in the late Yuling period, and 20-25 kg of calcium nitrate was applied per acre. 3. Foliar calcium. Use 300 times amino acid calcium or other chelated calcium liquid fertilizer. Spraying 5-6 times after germination, pre-flowering, flowering, young fruiting, and post-bagletting, the fruition can receive excellent results. 4. Through pruning, it will create an excellent light premise for the inner and inner branches of the tree crown. 5. When it comes to drought, it is watered in real time. Waterless pouring of the premise orchard, experimental grass cover or hole storage of fertilizer, so that the soil has always adhered to the maximum water holding capacity of 60% -70%. 6. Under the canopy, the soil layer is thickened, and the drains are repaired on the surface of the orchard to enter the dry season in real time to avoid water accumulation under the trees. 7. The fruit before the harvest of Apple was in full swing, and it encountered a long period of rain and rain (Meiyu weather). It was necessary to catch a day without rain, grab the time and spray 300 times of amino acid calcium, and spray fruit on the wet fruit bag. . 8. Before harvesting into the pit (library), apples are sprayed or washed with 300-400-fold amino acid calcium solution to avoid red spots, spots, bitter pits, molting, molting, and water mustard during storage. symptom.

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