How does jujube seedling wilt do?
Recently, many farmers reported that some jujube seedlings planted this spring gradually wilted when the new shoots grew to 10-20 cm, until they withered. Our analysis shows that:
1. From the point of view of climatic conditions, it is related to this year's special climate, such as low temperature, sandstorms and so on. In mid-April after jujube seedlings were planted, the low temperature in our city lasted for about a week, and the lowest temperature was below 10 degrees. Low soil temperature and poor root activity, at the same time, frequent sandstorms in this spring also caused excessive transpiration of newly planted jujube seedlings, resulting in wilting caused by loss of wood and water.
2. From the perspective of planting technology, there are the following aspects:
(1) the planting is too deep. The planting depth of jujube seedlings should be the original depth when the jujube seedlings come out of the nursery. The planting is too deep and exceeds the original grafting position, which is easy to suffocate and slow the growth of jujube seedlings. In addition, there was more rain and lack of oxygen in the soil before this year, which hindered the activity of the root system.
(2) the film mulching has not been uncovered. The purpose of plastic film mulching around jujube seedlings is to increase soil temperature and preserve soil moisture. However, due to the rapid rise of air temperature in mid-May this year, the temperature under the film is on the high side, which makes the soil anoxic and affects the development of root system.
(3) the soil viscosity is high. If the soil viscosity of the planting garden is high and more water is added, the root system of jujube seedlings is anoxic and can not grow and develop normally.
Measures to be taken at present:
1. Remove the plastic film and loosen the soil. If the planting is too deep, the grafting site should be exposed, and the soil around the seedlings should be loosened to increase permeability and restore root growth.
2. Foliar spraying fertilizer. Photosynthetic efficiency of compound leaves sprayed with 891 organic titanium and potassium dihydrogen phosphate. It can be sprayed to control leaf-eating pests at the same time.
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Cultivation and Management of Sweet Pear Melon
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Du pear is an excellent rootstock of grafted pear varieties, which is resistant to drought, cold and barren. It is generally planted in spring and autumn, but in remote and water-deficient mountainous areas, the survival rate is often affected by difficulties in transporting water and drought in spring. The fruit growers in our region have the experience of planting du pear rootstock seedlings in the rainy season, which has the advantages of high survival rate, fast establishment and low cost. 1 after the arrival of the continuous rainy season, when the underground water content is close to saturation, it is best to plant in the rain or before the rain. (2) the tillering seedlings of du pear were dug up from the hillside, and the seedlings were generally 0.
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