Black grape is a kind of large grain fresh food that has been promoted in recent years for high-quality, late-maturing, and storage-resistant. In 1998 Linqu County developed 500hm2 black grape. In 2000, due to continuous drought in spring and summer, the continuous maturing period of grape in autumn was continuous cloudy and rainy, resulting in a large number of cracked grapes in black grape. Generally, the fruit cracking was 20-30%, and the severity was as high as 50%. Seriously affected the quality of black grape wine and the economic benefits of farmers. Against grape split fruit. We adopted techniques such as spadulapping, spraying rare earth micro-fertilizers, reasonable watering, and grass-mulching, to make the cracking of the black grape significantly reduced, and the cracking fruit is controlled at about 2%, which improves the quality of the black grape. Has achieved very good economic benefits.
I. Causes of cracking black grapes
The cracking of black grapevines occurs mainly during the ripening of berries, and the cracks are mostly concentrated at the top of the fruit and at the fruit pedicle. The main cause of cracking is the rapid change in rainfall or moisture in the soil. The thin part of the peel is cracked to form a crack. In addition, the fruit of the black grape is tight, and the fruit in the near mature stage is crushed, adding to the cracking fruit.
Second, prevention measures:
1, sparse bagging. Bagging is the easiest way to prevent skin from absorbing water. When the fruit grows to the size of the bean, the small particles and the crowded fruit must be completely removed, so that each ear is kept 40-50 pieces, and the bags are bagged in time. A fungicide should be sprayed before bagging. Bags used for grape selection are also available in newspapers or white papers with good texture or plastic film bags.
2, spray rare earth fertilizer. During the fruit enlargement period, two 500 mg/kg rare earth elements were sprayed continuously and sprayed once every 7-10 days to make the pericarp thicken, thereby reducing cracking. The preparation should first use vinegar to adjust the water into slightly acidic (pH 5-6), and then add rare earth micro-fertilizer, fully stirred, spraying when the cool sunny day.
3, reasonable watering. To prevent cracking caused by drastic changes in soil moisture, it is necessary to pay attention to timely irrigation during drought, drainage in time after rain, to reduce the difference between dry and wet soil; to maintain relatively stable soil moisture, promote the uniform growth of berries. In case of drought in the later period of fruit development, multiple and small amount of water should be used to prevent flooding and prevent drastic changes in soil moisture content.
4, control of nitrogen fertilizer. Excessive application of nitrogen fertilizer, too late and rain before maturation also easily lead to thin skin and increased osmotic pressure of the fruit and cracking occurs. Therefore, it must be controlled before maturity.
5, grass covered film. Covering the grass between the rows of grapes, the thickness of 20 cm, can reduce the evaporation of water, so that the soil maintains a certain amount of moisture, which will help the even growth of grapes. The mulching between the rows of the fruit during the late growth period allows the rainfall in this period to be discharged outside the garden in a timely manner, so as to prevent the grapes from absorbing water and generating cracks.
At ancient times, people picked up wild fruits, and they found the magic of Goji , The pictograph word "qi" in Chinese character just like a man knelt down at a Goji tree , the left of the character "qi" seems like a tree, and the right like a person bowed down. That means as early as four thousand years ago, people found that Goji can keep fit and role of longevity ,Goji has magic power to people`s life.
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