In August, it was a critical period for the expansion of citrus fruits and autumn shoots. The main agricultural operations were conducted around shoots and fruits. If this period is not properly managed, it will not only affect the high-quality and high-yield products of the year, but will also have an impact on the results of the next year. The fruit growers should pay enough attention! 1, strong fruit This period is the last peak of citrus autumn shoots, fruit enlargement, and root growth. The demand for nutrients is very large, and the contradictory fruit is still there. The citrus as a finishing point, roots, shoots, and fruit have figured it out. When the citrus cultivates strong shoots and has a strong root system, it will greatly benefit the enlargement of the fruit. Therefore, management is mainly to strengthen the nutrition supply, protect the shoots, protect the roots, and promote the smooth expansion of the fruit. Here to remind you, we must pay attention to the trace elements such as calcium, magnesium, zinc, boron supplements, so as not to affect the late autumn shoots turn green, or fruits due to lack of factors leading to multiple physiological diseases. 2, Sunburn fruit Sunburn is a physiological disorder of citrus burn often occurs under high temperature and strong sunshine conditions, and it occurs more frequently in summer. At the beginning of sunburn, brown spots appeared, and then gradually enlarged, the surface was rough, the skin was thickened, the local growth was blocked, and the fruit was severely shedding. The main preventive measures are as follows. Regular watering: In the high temperature and drought season, regular soil watering should be performed to keep the soil properly moistened, and water mist sprayed on the canopy in the evening to increase the relative humidity of the air in the orchard. Rational use of medicines: Avoid spraying pesticides under hot sun, and use according to the product dilution instructions. Tree plate cover: before the onset of high-temperature heat damage, covering the tree disk, increase soil moisture content, lower ground temperature, can also implement orchard cultivation patterns. Improve the ability of plants to resist sun exposure: Deep application of organic fertilizers to promote the roots under the bar, enhance the ability of the roots to absorb water under drought conditions, thus ensuring that plants can have sufficient water for transpiration and cooling under strong light; foliar spray calcium fertilizer, and enhance leaf surface Sun resistance, calcium can make the cell wall more robust; Rational fertilization is not biased with nitrogen fertilizer, pay attention to supplement the trace element fertilizer to achieve a balanced nutrition, strong tree vigor to better resist sunburn hazards. For the premature leaves, spraying 800 times of P and K source library to promote aging, can effectively reduce the sun burning hazards. 3, cracking fruit Fruit cracking is an inevitable problem in citrus fruit enlargement and color change. It often causes citrus cracking and shedding, which occurs in different degrees from August to October each year. There are many causes of cracking, such as varieties, tree weakness, long drought and rain, lack of calcium and boron deficiency are all possible. Through the following aspects of regulation, reduce the amount of its occurrence. Fertilization management: strong fruit attacking fertilizer, can not be a one-time application of fertilizer effect too much to avoid the pulp to absorb nutrients too fast, leading to cracking fruit, can be "a tip three fat": 15 days before the shoot, new shoots 7 to 8 cm long The tender shoots turn green and three applications. When the fertilizer is applied, the sea sprite biological stimulant (root type) can be used to increase the soil fertility, enhance the tree vigor, and strengthen the roots. In combination with the compound fertilizer, the balanced development of the flesh and peel can be promoted. Peel cell wall density, pectin content, increased peel flexibility, can reduce the occurrence of cracking. Water Management: Water has a great influence on the growth and development of citrus fruits. Avoid cracking the fruit after cracking to strengthen irrigation. Prevention and cracking should be in the daily strengthening of the orchard's water management, implementation of scientific water. The scientific water use plan for different seasons is conducive to enhancing tree vigor and regulating the supply of nutrients and water in fruits, which has played a significant role in reducing fruit cracking. Reasonable use of growth regulators: After prolonged drought and no rain or long drought, the gibberellin is sprayed in time to keep the skin cells active and reduce fruit cracking. Strengthen the pruning of the trees: The citrus trees should be trimmed in time in order to avoid excessive shade in the forest and cause insufficient illumination. The excessive density of trees, weak growth, poor quality, and deformed fruits should be eliminated in time to avoid excessive consumption of tree nutrients, ensure sufficient nutrition for fruit development, and significantly reduce the probability of fruit cracking. Note that 3-4 leaves should be kept on the fruit to avoid sunburn and cracking caused by direct sunlight. X Ray Short Lead Apron,0.35Mmpb Short Lead Apron X-Ray,0.5Mmpb Xray Short Lead Apron,Xray Protection Short Apron Longkou Kangxie Medical Instrument Co., Ltd , https://www.kangxiemedical.com