Whether to collect or not lies in water, and to collect more and less in fertilizer. Entering the continuous high temperature and drought in May, it is unfavorable to the hard core of jujube nectarine, and it is found from the guidance of Gaocun workstation that some peach farmers do not know enough about the law of peach tree water demand. 1. Some peach farmers rely on weather forecasts, and the climatic conditions of drought and yin have paralyzed their minds, and they have a serious fluke mentality. 2. Some only watered before flowering, this year's flowering temperature is stable and the fruit setting rate is particularly good, I don't know the benefits of early fruit thinning, the fruit is full of new shoots of even seat leaves are difficult to grow, and the young fruits of the leaves are obviously small, dark and dull. 3. There is a more serious problem of watering with sprinkler irrigation, the underwater infiltration is too shallow, the soil moisture is too lacking, and the obvious leaf drooping phenomenon occurs, resulting in a large number of young fruits falling off twice.
The occurrence of the above phenomena occurs: 1. It is the influence of the coherent thinking of peach trees to tolerate drought and avoid waterlogging, and 2. It is affected by the rain in the early part of last year. 3. If there is root rot watering in the garden, the most feared thing is that it is afraid of aggravating the occurrence of root rot and not watering. In fact, it is more advisable to aggravate root rot due to excessive drought. 4. Relying on the influence of the idea of eating in the sky, checking the weather forecast every day, after a few days there was a hairy ineffective rain, looking forward to one after another, delaying the best watering time, and the result was a lot of gun fertilizer, and the underground moisture was too poor, but it was more serious than the drought, which was a provincial word in trouble.
Jujube nectarine (No. 3) to May 20 around the regional environment, one after another into the hard core period, must be combined with watering to top the hard core fertilizer, this is according to the young fruit development stage of watering top dressing a key fertilizer, it is related to the hardening of the core of the problem, fruit size, color and taste problems! It must be topdressed and watered 3~5 days before entering the hard core period, because the appropriate amount of water control should be used to facilitate the hardening of the nucleus. In the early management process, peach farmers have different ideas and different work, and as a result, there are jujube nectarines with strong trees, weak trees, vigorous trees, no drought elephant trees, especially drought elephant trees, etc., so it is necessary to talk about the problem of reasonable watering in the case of continuous high temperature and drought. Only by grasping the abundant water can we guarantee the abundant yield!
First, the young fruit stage of supplemental fertilization and comprehensive watering of the peach orchard, the tree potential is generally moderate and robust or individual is vigorous, chasing hard core fertilizer to reduce nitrogen, increase phosphorus, potassium and calcium, in order to balance the relationship between vegetative growth and reproductive growth, and is conducive to the hardening process of the core. It is allowed to water the running horse, and the water is wet over the ground, and the fertilizer can be chased up. It is opposed to watering enough to avoid causing new shoots to grow vigorously, which is not conducive to the hardening of the nucleus. In 60~70% of the peach orchard, drip irrigation, sprinkler irrigation and interlaced topdressing methods can also be used.
Second, there is a drought but not too serious garden, when the soil moisture content is still above 40~45%, the moderate and weak tree potential, it is recommended to combine the top dressing with hard core fertilizer, according to the calcium and potassium first nitrogen second, phosphorus third ratio reasonable top dressing. The water should be watered as much as possible to cope with the long-term high temperature and drought weather, which is conducive to the recovery of the tree and the hardening of the core.
3. Particularly arid peach orchard, soil moisture content is less than 40%, the leaves on the fruit branches are small, three leaves can top a strong tree with one large leaf, drooping gray and dark young fruits are small, and topdressing and watering must be skillful. In terms of fertilizer, nitrogen to increase, potassium and calcium can not be less, the appropriate amount of phosphorus can not be too much, more phosphorus is not conducive to the restoration of tree potential, but it is conducive to the fullness of the seed kernel, it is more difficult to take into account, but the restoration of tree potential is more important than the hardening of the core! Therefore, only through clever watering can the tree increase potential without affecting the hardening process of the nucleus. Only interlaced watering is allowed to top the hard core fertilizer, which does not affect the recovery of growth and is conducive to the hardening of the core. It is not allowed to be fully watered with large water and full of water, and it is not suitable for the peach orchard that is too drought, which will cause a sudden increase in water and fertilizer to make the new shoots grow vigorously, and the phenomenon of fruit drop will increase and cause a reduction in yield, and it is easy to cause fruit cracking. It can be topdressed and watered another row at an interval of 10 days, which is still in the early stage of hard core, which has little impact on the hardening of the core, and will not cause a large number of fruit drop and fruit cracking.
2 and 3 cause the tree to be weak or too weak, mostly caused by lack of water, and the leaf color is not yellow. However, there are also some weak trees caused by insufficient fertilization, and every peach farmer must know who has grasped the key node of water in order to call reasonable water and fertilizer management.
I think that in the period of continuous high temperature and drought, the balanced supply of water is very important, and there must be no overwaterlogging and drought. This is my experience summary for the reference of the majority of Peach Alliance members. Congratulations!
For the formula of applying hard core period, please refer to the article that the hard core fertilizer of jujube nectarine No. 3 should account for 60% of the fertilizer in the growth period.
Author: Wang Wankui, lecturer of Zhongnong Le Fruit Science Research Institute
Source: Zhongnongle