The key points for the latest rapid breeding of apple

Apple is one of the most common fruits in life, and it is also one of the fruit trees with the largest planting area in China, and the robust seedlings can be obtained very quickly through rapid seedling breeding technology, which saves a lot of time for production. But rapid breeding should also pay attention to a few points, the following with the editor to understand it.

1. Choose fast-growing rootstocks

Among the grafted rootstocks of apple, begonia and Xifu begonia are more cold-resistant, drought-resistant, waterlogging-resistant, saline-alkali tolerant, and have strong grafting affinity, developed root system and fast seedling growth rate, which generally grow to the thickness of grafting in the summer of the same year. The selection of fast-growing rootstocks is the basis of rapid seedling growth.

2. Grasp the time of raising seedlings

It is appropriate for apple seedlings to be sowed in autumn, when the climate is mild, which is conducive to seed emergence, mulch should be covered immediately after sowing, and spring sowing should be sowed in advance to avoid high temperature during seedling growth, which is not conducive to seedling growth. At the same time, it is necessary to do a good job of cold protection and moisturizing measures, the common protection measures are anti-cold wind barrier, sun bed, hotbed, plastic film mulching and so on. Plastic film and greenhouse film cover the seedling bed to raise seedlings centrally. Then transplanting to the open-field grafting nursery, this method can advance the sowing date, but can not be transplanted until after the late frost.

3. Heart-picking grafting

When the rootstock seedlings grow to 30 cm, the heart is removed to make the stem stout. When the stem is 0.5-0.6 cm in diameter, it can be grafted, and the grafting must be completed before the end of June. Grafting generally adopts the measure of high bud grafting, which is not cut and pasted immediately after the seedling survives, but does not break the rootstock at the place of 1m / 2cm above the bud, so as to promote the germination of the bud, and then cut the rootstock when the bud grows to 5Mui and 6 true leaves.

4. Strengthen the management of fertilizer and water

The loose and fertile land should be selected as the nursery, and the application amount of base fertilizer should be increased, and 10-15 kg urea per mu should be applied in combination with watering before seedling setting to grafting. After grafting survived, urea was applied 8-10 kg per mu, compound fertilizer 8-15 kg per mu in August-September, foliar fertilizer was sprayed every other half month, 300 times urea solution was sprayed in the early stage, and 300 times potassium dihydrogen phosphate was sprayed in the later stage.

The above is the introduction of the key points for the rapid growth of apple seedlings. I hope it can help you. If you want to know more about it, please follow us.