Causes of defoliation of citrus in winter and its prevention
"luxuriant leaves in winter and abundant fruits in autumn". In order to achieve high yield and high quality of citrus, we must first ensure that there are a large number of leaves on the tree to survive the winter. The main reasons for leaf shedding in winter are as follows: 1. Partial application of nitrogen fertilizer or excessive application of nitrogen fertilizer shortens the life of old leaves and falls off ahead of time. 2. Dry application of chemical fertilizer before and after fruit harvest, or insufficient amount of water, too high concentration of fertilizer solution, root and leaf damage. 3. When clearing the garden after fruit harvest, the concentration of pesticide is too high, and the drug damage leads to fallen leaves. 4. Suffer from mite, scale, leaf miner, anthracnose and other harm in autumn or early winter, especially mites, resulting in the decline of leaf quality, and different degrees of defoliation will occur after winter. 5. The fallen leaves are caused by wind injury and freezing injury. 6. Drought, flood and fallen leaves. In view of the above causes of citrus defoliation in winter, corresponding preventive measures can be taken. ① should pay attention to rational fertilization and apply three-element compound fertilizer, rotten residue fertilizer, cake fertilizer, human and animal fertilizer in addition to urea before and after fruit harvest. ② must avoid dry application of chemical fertilizers and flexibly control the amount of water added according to the weather. Spraying 38% rare earth elements before and after ③ fruit picking and adding edible rice vinegar to 300 times can quickly supplement the leaf life and improve the ability of drought resistance and frost resistance. ④ should do a good job in pest control in autumn and early winter, and pay attention to the concentration of pesticides. In addition, attention should be paid to orchard infrastructure construction, dredging drainage and irrigation ditches, leveling garden soil, so that drought and waterlogging can drain, and there is no stagnant water on the ditch and soil surface after rain.
- Prev
Planting methods of strawberry seedlings
The main results are as follows: 1. The soil is disinfected by solar heat. The specific operation method: apply the farm manure in the base fertilizer into the soil, turn it deeply, pour through the water, and cover the soil surface with plastic film or old greenhouse film. In order to improve the disinfection effect, it is suggested that the soil disinfection of the greenhouse should cover the plastic film or the old greenhouse film while buckling the greenhouse film and sealing the greenhouse. Dirt.
- Next
What are the common bud grafting methods for citrus? How to do it?
The methods of citrus grafting can be divided into three types: budding, ventral grafting and cutting grafting. Spring splicing is mostly used in the south subtropics with higher temperature, while bud grafting or multiple grafting is mostly used in the middle subtropics and the north in autumn. Citrus bud grafting has "T" bud grafting and inverted "⊥" bud grafting, both methods are used everywhere, suitable grafting period.
Related
- Moge, come on! The staff of the peasant association in the producing area of cantaloupe were frightened when the crowd gathered.
- Causes and Solutions of low Fruit setting rate of Apple
- Symptoms and control measures of passion fruit virus disease
- Fruit growing lesson: how do apple orchards keep high yields?
- Can you build orchards in the mountains? What are the pros and cons?
- How to manage the coloring period of Crisson grape?
- This paper introduces the processing technology of two kinds of fig products.
- How much is a month for retired teachers in rural areas by 2020?
- How can strawberry planting increase sugar content? We should pay attention to management in many aspects.
- What are the cultivation techniques on how to improve the yield of golden fruit?