Planting technique of pomelo

Grapefruit is a very common fruit, every autumn and winter can see the figure of grapefruit, because this is the best time to eat grapefruit. I believe that we all eat a lot of grapefruit but do not understand the cultivation of grapefruit, the following editor for everyone to popularize the planting technology of grapefruit!

Planting technique of pomelo

1. The requirements and selection of orchard land require that the soil structure and physical properties are good, the soil layer is deep and fertile, the drainage, air permeability and water retention are good, the groundwater level is low, and there will be no waterlogging in the rainy season, and the content of humus in the cultivated layer of the land should be high, which is required to reach 3-5%.

2. For the requirements and selection of fruit seedlings, the branches of excellent mother trees should be selected as scion grafting seedlings, and strong seedlings with soil free of diseases and insect pests should be selected.

3. Planting specification 1 pomelo generally planting 50 plants per mu, plant row spacing 3.3 m × 4 m, pomelo 2 planting 60 plants per mu, plant spacing 3.3 m × 3.3 m.

4. The planting time is suitable for spring and autumn, especially in autumn. It is planted from the Beginning of Spring to Rain Water in spring and from mid-September to the end of October in autumn.

5. Digging nests requires digging large nests in order to improve the soil. The big nest is 1 meter wide and 1 meter deep. After the nest is dug, fill in the mature soil, green manure, compost, etc., one layer of fertilizer and one layer of soil, and the base pile is high above the ground.

6. the upper soil in the nest was dug and loosened by planting, and 15 kg of rotten compost, 1.2 kg of phosphate fertilizer and 0.6 kg of potash fertilizer were fully mixed and planted, and then covered with a layer of fine soil. Dig a small nest in the planting nest, which should be the same size as the soil mass with soil seedlings, and then put the seedlings on top to make them stand upright, spread the roots, and clog the fine soil. Those who have the conditions can cover the tree plate with green manure or straw to maintain temperature and humidity, which is conducive to survival. After 20-30 days to resume growth, fertilize every 10-15 days to promote growth, and pay attention to the regular prevention and control of diseases and insect pests, remove adventitious buds and branches in time, and cultivate good crowns.

Control of planting diseases of pomelo

There are many diseases and insect pests harmful to pomelo, such as mites, scale, leaf miner, anthrax and so on.

The main results are as follows: 1. From the end of February to the first ten days of April, two times of continuous spraying were used to control mites and other pests, and pesticides were used: pesticides + acaricides + fungicides.

2. From the middle of May to the end of June, the young fruit period after Xiehua was sprayed twice continuously, mainly to control scale and other pests, and pesticides: insecticides and fungicides were used.

3. From mid-July to early September in autumn, spraying continuously for 3-4 times, mainly to control leaf miner, but also to control Phoenix butterfly, anthracnose and so on, using pesticides: pesticides + fungicides.

4. The second peak of mite harm is from mid-September to early October. It should be sprayed 1-2 times to kill mites and treat other diseases and insect pests at the same time, using pesticides: insecticides + acaricides + fungicides.

5. Spray stone-sulfur mixture once in winter to clear the garden. Insecticides can be used alternately, such as Lesbon, trichlorfon, trichlorfon, etc., fungicides can choose carbendazim, thiophanate, Dysen zinc, etc., acaricides can be sprayed alternately, and the spray should be uniform and thoughtful.

Growth conditions of grapefruit

1. Climatic conditions. The annual average temperature of the place of origin is 17.5 ℃, the extreme high temperature is 40.5 ℃, the extreme minimum temperature is-9.2 ℃, the frost-free period takes 238 days, the annual precipitation is 1725.3 mm, and the annual sunshine is 1898.6 hours. The low temperature tolerance of grapefruit is better than that of sweet orange, orange and Wenzhou mandarin.

2. Topography and topography. Grapefruit on the terrain requirements are not strict, plains, beaches, hills, low mountains, less than 500 meters above sea level, slope not more than 25 degrees of the mountains can be planted.

3. Grapefruit is not strict to the soil, and the suitable pH value of soil is 5.5-6.5. Alluvial soil, red-yellow soil, purple sand soil, vegetable garden soil, as long as the soil layer is deep, good drainage, can be planted. Sandy loam is the best soil.

Fertilization management

Emphasis is placed on organic fertilizer and farm manure. Fruit trees generally do not use chemical fertilizers, especially chlorine fertilizers. The first fruit trees (3-4 years) are mainly fertilized three times after fruit picking, before sprouting in spring and in the period of strong fruit. Base fertilizer was applied from August to September after fruit harvest, mainly farm fertilizer, compound fertilizer and withered fertilizer, quick-acting nitrogen fertilizer was applied before spring shoot sprouting in February to promote spring shoot growth, and strong fruit fertilizer was applied in early June, mainly phosphorus and potash fertilizer. promote fruit expansion and shoot growth.

1. Principles of fertilization:

The needs of various nutrient elements for blood orange should be fully met, and the application of more organic fertilizer, rational application of inorganic fertilizer and formula fertilizer should be advocated. Fertilization was guided according to the results of leaf analysis, orchard soil analysis and blood orange phenology.

2. Fertilization methods:

Soil fertilization is the main method, combined with foliar fertilization. The methods of ring ditch application, furrow application, hole application and soil surface fertilizer application were adopted.

①, fertilization for young trees: frequently applied thinly, mainly nitrogen fertilizer, combined with phosphorus and potassium fertilizer, 5-6 times in spring, summer and autumn shoot emergence period, (March, May, June, July, September, December, each plant applied ammonium bicarbonate 0.4jin or urea 0.2jin. The annual application of pure nitrogen per young tree for 1-3 years is 100-400g, and the ratio of nitrogen, phosphorus and potassium is 1.0: (0.4-0.5): 1.0. Adult trees should be fertilized for four times, that is, sprouting fertilizer, fruit protection fertilizer, strong fruit fertilizer and fruit picking fertilizer. Generally speaking, the amount of fertilizer applied is 2-3 jin chemical fertilizer, 1 load of dung water, 1-2 jin phosphate-potassium fertilizer + 1-2 jin chemical fertilizer, 1-2 jin chemical fertilizer + 1-2 jin phosphorus-potassium fertilizer, and 50-100 jin organic fertilizer + 1-2 jin chemical fertilizer.

②, moisture: irrigation when the soil is dry, drainage when stagnant water.

As above is the editor for you to sort out some of the relevant technical knowledge about planting grapefruit trees, I believe everyone has a certain understanding of planting grapefruit! Grapefruit is nutritious and tastes good, especially loved by the majority of consumers, and the planting prospect is very considerable.