The phenomenon of citrus cracking in Xiushan, Chongqing and its control measures
Citrus fruit cracking is a physiological disease that causes fruit drop during the fruit period and affects yield. Because of the severe drought this year in our county, drought and drought, and drought, the drought is too long, resulting in fruit cracking phenomenon is significantly heavier than usual, mainly in navel oranges, sweet oranges, Wenzhou oranges, grapefruit and other heavier, the county's yield of citrus fruits Cause greater impact. Therefore, to increase the income of farmers and reduce the occurrence of cracking, adopt comprehensive agronomic measures such as selection of fine varieties, rational fertilization, growth regulator spraying and brushing, tipping and pruning.
1, choose a good variety. Selecting special early-maturing and late-maturing varieties to avoid high temperature and drought season during the strong fruit period can reduce the occurrence of cracking and fruit falling.
2, strengthen the cultivation and management. Deep plowing in the Orangery, cultivating garden soil in winter and summer, timely irrigation, rational fertilization, improving soil fertility, and strengthening tree vigor are important measures to reduce the occurrence of cracking.
3. Before cultivating the top soil, the topsoil can be covered with weeds and green manure, which can reduce the temperature, moisturize, prevent soil scorching and weeds in the garden, and provide fertilizer, soil conservation, fertilizer conservation and moisture retention.
4, rational fertilization. For citrus groves with a large number of results in the past and severe fruit cracking and fruit drop in previous years, phosphorus fertilizers were applied less frequently in strong fruit fertilizers, and more ammonia and potassium fertilizers were applied to increase tree vigor, enrich fruit tissue, increase thickness and toughness of peels. . In addition, spraying 1%-2% turfgrass filtration solution once every 10-15 days on the foliage can increase the thickness of the peel, increase the toughness, reduce the cracking fruit, and drop the fruit amount.
5. Spray growth regulators. Spraying the "1992", paclobutrazol and other growth regulators can significantly reduce cracking and fruit drop caused by abnormal high temperature and drought.
6, wipe buds, twist tip, trim. For new sprouts, summer shoots should be timely eradicated, broken, cut off too dense branches, cluster branches, leggy branches, pests and diseases branches, can reduce the consumption of water, fertilizer and the number of cracked fruit, fruit drop.
Foot of ningxia hong xingda incense Organic Apple fruit suborbicular, fruit surface color yellow green, most with orange chardonnay fruit surface, covered with bright red stripes, pulp yellow-white, succulent crisp, sweet, rich fragrance, quality first-class; The fruit has a sugar content of over 15%, more than 4% of the national average, and the flesh is tight and crisp and sweet, which is widely loved by consumers all over the world. There is a longer optimal consumption date than any other apple, not even refrigerated. It can be kept for 4 months at normal temperature. If refrigerated, Fuji can be kept for 5--7 months.
Altitude: high altitude area light, clean air, environment close to original condition, no industrial pollution. With an average elevation of 1160-2900m, the central health center has a strong uv light, which produces the natural pollution-free apple, which conforms to the concept of a modern green diet.
Temperature: moderate temperature can avoid the chance of fruit tree encountering disease. The average temperature in ningxia is 8.4 degrees Celsius, which has an important influence on the growth, development, yield and quality of apple. The piedmont apple is thriving in such a good environment.
Humidity environment: moderate amount of rainfall provides necessary conditions for apple's growth. The annual rainfall in the central health region is 186 millimeters. The fruit is slow to grow and the fruit is hard and hard, which fully guarantees the fruit's sugar content and the relatively average size of apples.
Sunshine condition: apple is the fruit tree, the central health area of the whole year is nearly 3,800 hours, is beneficial to the Apple Fruit coloring. The piedmont apples are red and bright.
Temperature difference factors: ambassador apple nighttime respiration weak temperature gap between day and night, consume less organic matter, the accumulation of organic matter during the day more, that apple store down a large number of glucose sugar candy, etc have better taste. The average diurnal temperature difference between apple and apple is 14 degrees centigrade, and the larger diurnal temperature difference ensures the sweet and delicious characteristics of the apple.
Other factors: frost can make apple blossom and fruit, which can cause frozen flower jelly, which is bad for apple's production. The piedmont apple has been kept at least 167 days without frost for the whole year, which minimizes the influence of apple on yield and quality.
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Ningxia hongxingda fruit industry , https://www.hxdfruit.com