Forest fruit seedlings antifreeze method

Freezing damage to seedlings has a great influence on the quality of seedlings. Some of the seedlings were frozen and the whole plant was dead. Some of the tops of the seedlings were freeze-dried, affecting the survival and growth of the fruit in the following year. Therefore, in order to improve the antifreeze ability of seedlings, assist antifreeze measures, and strengthen the management of seedlings to facilitate safe wintering of seedlings. The specific measures are as follows:

1. Increase the use of phosphorus and potassium fertilizers to promote the lignification of seedlings. Trichogenous monobasic potassium phosphate should be applied with 0.3% potassium dihydrogen phosphate every 10 days from the beginning of November. Or use plant ash at 4 to 5 lbs per acre and apply it twice in succession. The nursery will stop applying nitrogen fertilizer after autumn.

2. Boron is sprayed outside the root to improve cold resistance. Every 10 days from November, spray 0.5% borax or mix with potassium dihydrogen phosphate. Spray three times.

3, winter protection. The seedlings with weak cold resistance can be buried in the soil for winter, and the precious seedlings can be used in antifreeze greenhouses (greenhouses). Alpine nurseries can be built wind barriers, that is, in the wind surface hanging pine wood branches to withstand the cold wind. A layer of straw or thatch can also be kept warm.

4, irrigation antifreeze. On the eve of the frost, diving in the nursery can make the soil temperature no lower than 0°C, so that the seedlings will not freeze.

5, smoke and cold. In particularly cold weather, two to three smoke stacks can be installed around the nursery. Light up when the temperature drops to 0°C and keep the smoke until sunrise.

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