The planting technology of Dahongpao chestnut, reasonable fertilization to improve quality

Soil: it is suitable to grow on slightly acidic soil with a PH value of 5-6 and avoid waterlogging. Site selection: choose the place with lower groundwater level and thicker soil layer to build the garden. Air temperature: the suitable average annual temperature is about 10 ℃-22 ℃. Moisture: irrigated before germination and during the period of rapid fruit growth. Fertilization: base fertilizer should use soil mixed fertilizer, topdressing in early spring and summer, and potassium dihydrogen phosphate should be sprayed half a month before harvest. Reasonable close planting: the density of chestnut trees is different in different areas.

1. The efficacy and function of Dahongpao Chestnut

The main results are as follows: 1. Dahongpao chestnut is resistant to storage and can be supplied for a long time in the market. Dahongpao chestnut is characterized by invigorating the spleen and replenishing qi. Dahongpao chestnut can be eaten raw or fried, and its pulp can be made into many dishes, cakes and canned food. the shell can cure nausea, and the root can treat partial kidney qi.

2. Its trunk is made of hard material, straight texture, anticorrosive and moisture-resistant, and can be made into military industry, vehicles, ships, furniture and so on.

3. Its branches, leaves, bark and spiny buds are rich in tannin, which can extract baking gum and erysipelas.

2. Planting techniques of Dahongpao Chestnut

1. Soil

Dahongpao chestnut is suitable to grow in slightly acidic soil with PH 5-6, because chestnut is a high manganese plant, it can activate manganese, calcium and other nutrient elements, which is beneficial to the absorption of chestnut and make its growth better. Dahongpao chestnut is afraid of waterlogging, if the rainfall is too much, the soil will be in stagnant water for a long time, which is easy to affect the mycorrhizal growth of chestnut.

2. Site selection

Chestnut orchard should choose places with low groundwater level and good drainage, but not windy places for planting. If planting in hills and hills, choose areas near the mountains with gentle terrain and thick soil layer.

3. Air temperature

The average annual temperature suitable for the growth of Dahongpao chestnut is about 10 ℃-22 ℃. Because the temperature is too high, the hibernation time of chestnut is insufficient, and the growth and development of chestnut is poor. If the temperature is too low, it will lead to freezing injury.

4. Moisture

Chinese chestnut likes wet environment, and water is indispensable. It should be irrigated before chestnut sprouting and during the period of rapid fruit growth, but it can not produce stagnant water, which is beneficial to the normal growth and development of fruit trees and the improvement of fruit quality.

5. Fertilization

Fertilization can make Dahongpao board chestnut high yield, generally, the basic fertilizer should be based on soil miscellaneous fertilizer, fertilization can improve the soil, improve the soil fertilizer and water conservation capacity, but also provide comprehensive nutrient elements for chestnut. The best fertilization time is in autumn after fruit harvest, because the temperature is high, the fertilizer is easy to mature, and the chestnut tree is just in the period of new bud, which can absorb fertilizer, promote the accumulation of tree nutrition, and play a good role in the differentiation of female flowers in the coming year.

(1) Direct topdressing

In early spring, it is generally necessary to give priority to available nitrogen fertilizer, combined with phosphorus and potassium fertilizer, 0.3-0.5 kg urea per tree in spring, 2 kg urea per tree in full fruit period, and watering after fertilization. can give full play to the fertilizer effect.

Summer: topdressing should be from late July to mid-August. The use of available nitrogen and phosphorus fertilizer can promote fruit grain enlargement, pulp satiety and improve fruit quality.

(2) extra-root topdressing

For the first time: when the basal leaves of chestnut branches change from yellow to green in early spring, 0.3% Rue 0.5% urea and 0.3% Mel 0.5% borax should be sprayed, which can promote the function of basic leaves, improve photosynthesis and form canned flowers.

The second time: during the period of one month and half a month before fruit harvest, 0.1% potassium dihydrogen phosphate was sprayed twice every 13 days or so, which can improve photosynthetic efficiency, so that nutrients can be transferred into the fruit, and finally increase the weight of a single grain.

6. Reasonable close planting

Reasonable close planting of Dahongpao chestnut trees can increase the yield per unit area. It is most suitable to plant about 35 plants per mu in Dahongpao chestnut orchard in the plain, and about 50 plants per mu in Dahongpao chestnut orchard in mountainous areas. it is most suitable to plant about 60-110 plants per mu in the planned dense planting chestnut orchard.