The climate is ever-changing, and all our farm work will become sub-active with climate change, no! It turns out that the most important work of fruit thinning and pruning continues to dry with high temperatures, so it is necessary to make way for watering to resist drought, and watering has become the first priority, and it is also the top priority in the current management. If the soil is not watered as soon as possible, the growth time will be delayed, the leaves will become smaller, the pulp cells will stop dividing, and the fruit-fruit ratio will be unreasonable and the fruit growth will be affected. Therefore, the fruit should be thinned and pruned first, and the impact on the overall situation is not too great. In particular, it is not necessary to water weak trees that do not sprout new shoots on fruiting branches and have few fruits and leaves. Except for the step-by-step plant protection work, all work must make way for drought-resistant watering work.
First, Tiankong and human promotion are all about balancing the relationship between vegetative growth and reproductive growth.
Pruning is the relationship between the upper and lower levels of the balanced tree, and it is also the relationship between the balance of the branches. The relationship between vegetative growth and reproductive growth depends on the adjustment relationship between water and fertilizer. Water comes first, because water is the carrier of fertilizer, and without water, no matter how much fertilizer is applied, it will be in vain! On the contrary, it is not conducive to the growth of the root system, and the high concentration of reasonable fertilization without water will even cause capillary root damage. As long as there is enough water, the leaves can grow into large leaves, and the photosynthetic efficiency can be improved, so as to lay the foundation for the future expansion of the fruit, in order to truly reflect the truth that the leaves are mothers and fruits are dolls.
How much this watering has to assess the long-term weather changes, according to my opinion, it is still a continuous high temperature and drought climate, even if there is rain, it will not rain too much, it is called Tiankong, which is not conducive to the normal growth of peach trees, and it is called forward promotion if you catch the water! Only by promoting the growth of weak trees can they return to prosperity.
When the soil moisture drops below 45%, it is the critical value of water shortage, and when it is below 40%, all vegetative growth and fruit development basically stop. It is important to know the dangers of high temperatures and persistent droughts. Therefore, you will see that the leaves are drooping and the light is sufficient, and the light is full of fruits, and there is basically no photosynthesis. Therefore, even if there is an imbalance in the growth of some new shoots, you don't have to think about pruning. If the drought continues, a large number of fruits will fall.
As long as the jujube nectarine tree is not too dry, this watering as much as possible to water well, the drought tolerance time can be extended, it is recommended that the underwater permeability soil layer is below 40 cm, do not be afraid of wasting fertilizer The roots will automatically find fertilizer (not too deep). It can completely reach the entire hardcore period, and the water is basically enough. Of course, it is better to water in alternate rows in the case of drought in individual orchards, so that it can be adaptable and will not cause a large number of fruit drop and cracking.
Second, the evaluation of the amount of hard core fertilizer should be based on the amount of chemical fertilizer applied in autumn, such as 1 bag or 2 bags of long-lasting fertilizer, how much fertilizer before flowering, how much growth combined with hanging fruit in the young fruit stage, and how much watering is related to the effect of fertilizer. If a lot of fertilizer is applied to the tree is still weak, then it must be considered that the lack of water caused by the drought caused by false weakness, based on the color, the dark leaf color is not caused by the lack of fertilizer. It can be reasonably applied to the expanded formula fertilizer. Calculated with a yield of more than 6,000 kg per mu, 1 bag of biological enzyme mycin + 1 bag of milk protein + 20 kg of high potassium + 20~25 kg of calcium per mu. If the output is less than 6,000 catties, it can be reduced as appropriate.
Third, fruit thinning must be done early. However, affected by various factors, most peach farmers do not take action, and are about to enter the hard core period, and the fruit is still a bunch of fruits on the fruit, which seriously consumes the stored nutrients and the nutrients made by the leaves of the year, and the new shoots are short or rarely the new shoots are young and the leaves are still small, this kind of tree must be regarded as a weak tree, and it is appropriate to add more nitrogen fertilizer, and you can use half a bucket of Mengli + half a bag of milk protein or balance to sprinkle fruit grain + high potassium 20 kg + calcium 20 ~ 25 kg, which can promote the growth of new shoots, and can meet the hardening of the core.
Fourth, the plant protection work can not be relaxed. In the hard core period, the focus is on the prevention and control of small pears, and the treatment of pests such as red and white spiders and green bugs. In drier climates, the incidence of diseases is relatively reduced, but the prevention and control of diseases cannot be neglected.
Author: Wang Wankui, lecturer of Zhongnong Le Fruit Science Research Institute
Source: Zhongnongle