After the warm winter, what are the prevention and remedial measures for the cold in the late spring of fruit trees? Suggest fruit growers to collect!

Although it has entered the spring, the temperature is getting higher and higher, but there is still the possibility of a sudden attack of cold air, this phenomenon is commonly known as "late spring cold". The sudden rise and fall of the environmental temperature will cause great harm to the growth of fruit trees. After the warm winter, what are the prevention and remedial measures for the cold in the late spring of fruit trees? Suggest fruit growers to collect!

1. Preventive measures for late spring cold in fruit trees

1. Strengthen field management

Strengthen the orchard soil fertilizer and water management: and increase the application of organic fertilizer, more foliar topdressing, protect plant leaves, in order to improve the nutritional level of trees and enhance the resistance of fruit trees to low temperature.

Strengthen the prevention and control of diseases and pests: combined with clearing the garden, we need to take comprehensive control measures for the main diseases and pests of fruit trees in order to maintain a strong tree potential and enhance the resistance of trees to freezing injury.

Take measures to delay flowering: we can make full use of the characteristics of late flowering of secondary shoots, heavy cutting in winter, coring in summer, promoting shoots, or spraying growth regulators to delay the flowering process and stagger the period of low temperature and freezing injury in the flowering period of fruit trees.

2. Take anti-freezing measures

Watering: when there is a strong wind cooling forecast, we must irrigate cold water throughout the garden, which can not only effectively prevent the invasion of cold waves, reduce ground radiation, but also replenish tree moisture, increase air humidity, increase dew point temperature, and effectively reduce freezing damage. By adopting this method, the flowering period of fruit trees can be postponed for 3-4 days, which is helpful to avoid the main frost period.

Tree plate cover: spread a layer of wheat straw, weeds, rice straw, leaves and other sundries 10-2 cm thick in the tree plate, and pour water thoroughly to make the grass all wet, and then sprinkle a layer of soil, which can not only preserve soil moisture, but also prevent the invasion of cold air, and has a very significant effect on maintaining and raising soil temperature and preventing frost damage.

Trunk whitening: in early spring, we can use whitening agent to brush tree trunks and main branches, which can not only delay phenology, but also kill insects and prevent freezing. The preparation method of whitening agent is as follows: 10 parts of water, 3 parts of quicklime, 0.5 parts of stone-sulfur mixture, 0.5 parts of salt, a little oil, and then stir evenly.

II. Remedial measures for cold in late spring of fruit trees

1. Florescence remediation

Under the condition that the receptacle is not damaged, Tianda solution can be sprayed in time, which can promote parthenocarpy and make up for certain yield loss.

For fruit trees that have not finished blooming, artificial pollination needs to be carried out immediately, and 0.3% borax and 1% sugarcane solution are sprayed on the leaves to improve the fruit setting rate of fruit trees.

Strengthen the comprehensive management of soil, fertilizer and water, cultivate strong fruit trees, promote fruit development, increase single fruit weight, and reduce the yield loss of fruit trees as far as possible.

We will strengthen the comprehensive prevention and control of diseases and insect pests and reduce tree weakness and economic losses caused by diseases and insect pests.

2. Post-anthesis remedy

Delayed pruning and wound protection: it is necessary to postpone the pruning time of fruit trees to avoid new wounds, which is helpful to distinguish and distinguish frostbitten buds from frostbitten branches, and maximize the yield and growth of fruit trees. After the low temperature, the cut should be reduced as much as possible, and the cut oil should be used to protect the wound. For the cut cut of the pruned tree, the unprotected piece of paper should be protected with the cut oil. At the same time, after the fruit tree sprouts, it is necessary to check the shrunk and frozen branches to strictly prevent the outbreak and epidemic of apple rot after freezing injury.

Timely prevention and control of diseases and insect pests: frozen fruit trees are often weak, poor resistance, to summer and autumn, easy to cause resin disease, rot disease, fruit tree wounds should be smeared and disinfected in time.

Strengthen the management of soil, fertilizer and water: we need to apply special fertilizer for fruit trees, combined with foliar fertilizer. In addition, timely ploughing is needed to loosen the soil in order to increase the soil temperature.

Measures to improve cultivation: for apple trees with frozen flower buds, we should spray foliar fertilizer before flowering and after flowering, use bee pollination and artificial pollination to increase fruit setting rate and final yield. On this basis, we can strengthen fertilizer and water management, promote the healthy growth of trees, retain fruit scientifically, further improve apple yield and quality, and reduce economic losses.

In the late spring cold of fruit trees, prevention should be given priority to and remediation should be supplemented. Fruit growers should actively do a good job in the prevention of late spring cold so as to minimize the loss.