Effects of Environmental Conditions on Fruit Shrinkage of Jujube

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Jujube fruit disease is commonly known as foggy tide, dry kidney, etc., red jujube producing areas have occurred, different regions, different years, different rainfall, rainfall duration, different visibility of fog and duration of fog, jujube shrinking disease severity The lighter ones cut output by 40% to 50%, and the severer ones cut output by more than 85%. The jujube farmer trimmed the jujube trees, used pesticides to fight diseases and insect pests, fertilized fertilizers, etc., and consumed a lot of manpower and material resources until the harvest season, together with the occurrence of jujube fruit cracking, which caused red jujube berries to rot and the farmers' grains to fail.

Tang County Forestry Bureau Chai Dongyan and Zhao Xingmin conducted observations of fog visibility, fog duration, light and jujube fruit shrinkage in Chaolinggou Zaozuo District, Shangjiao Village, Yangjiao Township: Chaolinggou was 5 km in total length and was oriented north and south, with an average elevation. 380 meters, the bottom of the ditch is 320 meters above sea level, the ditch palm is 440 meters above sea level, the average ditch is 50 meters wide, and the soil is sandy soil. Jujube trees are about 80 years old. Their management level is average, their tree vigor is medium, and there are cereal crops under the trees. In the bottom of the ditch, in the ditch, and in the ditch, three observation points at different positions were placed. Each point selected 20 trees and the results were normal. The normal jujube tree was used as a survey tree for the occurrence of jujube fruit shrinkage, and the results of the survey were collected:

1. The relationship between fog visibility and jujube fruit disease.

The investigation found that the average fog visibility at the bottom of the ditch was 10 meters, the duration of fog was 50 hours, and the incidence of fruit shrinkage was 82%; the average fog visibility in the ditch was 20 meters, the fog duration was 40 hours, and the rate of fruit shrinkage was 63%; Visibility of 30 meters, fog duration of 20 hours, 23% of the incidence of jujube shrinking fruit. According to the analysis, the lower the visibility of fog and the longer the duration, the higher the incidence of fruit shrinkage of jujube; the incidence of jujube fruit shrinking disease, which is less rapid than fog, is lower. Gap palm visibility visibility than the bottom of the trench, short duration, groove palm than the ditch at the end of the jujube fruit crown disease light.

2. The relationship between light and jujube fruit disease.

The longer the duration of rain and fog, the higher the air humidity, the faster the speed of growth of jujube fruit and the tenderness of tissues. In case of strong light, the direct tissue damage, dehydration and necrosis. Symptoms appeared in 3 days, and the necrotic lesions gradually expanded and became unusable. After the fog and after the rain, it was exposed to weak sunlight, and the occurrence of jujube fruit was light or non-pathogenic, even though the onset was slow.

3. Control measures.

1Make a reasonable pruning so that the tree can be ventilated and translucent.

2 It is forbidden to develop jujube trees in areas with low accumulation of fog and fog.

3 Increase the application of organic fertilizer, compound fertilizer, and special fertilizer for fruit trees to rejuvenate the tree potential and improve disease resistance.

Starting in mid-July, the tree crowns were sprayed with 200 times the dates to prevent cracks and protect the fruit. They were sprayed every 15 days and sprayed 4 to 5 times. Http://Content/76c289b1-53f7-4bb3-8ef0-34114b4e9a2c?cType=2

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