Planting conditions of grapefruit

Select sandy loam soil with deep soil layer and strong drainage performance, the annual average temperature should be controlled between 18-20 ℃, the moisture in the soil should be kept at about 60-80% of the field capacity, the oxygen content in the soil should be more than 6%, the organic matter content in the main distribution layer of the root system should reach 5%, and the PH value should be controlled between 6-6.5.

The requirement of grapefruit for soil is not very high, as long as the soil layer is deep and has good drainage. In order to promote the better growth and development of grapefruit, it is best to choose sandy soil.

Generally, fruit trees are planted after slightly maturing in autumn from September to November or before sprouting in spring from February to March, the planting density should be controlled at 3m × 4m, and 55-60 trees per mu should be planted.

Planting conditions of grapefruit

1. Temperature

The annual average temperature is between 16.6 and 21.3℃, the average temperature in January is 5.4-13.2℃, the annual accumulated temperature of ≥ 10 ℃ is 5300-7500 ℃, and the absolute low temperature is 11.1 ℃ below zero. Grapefruit can be planted, but the annual average temperature of planting grapefruit should be between 18-20 ℃, the average temperature in January is between 7-9 ℃, and the annual accumulated temperature of ≥ 10 ℃ is between 6000-7500 ℃. The absolute low temperature is above minus 5 ℃.

2. Soil

It is best to choose a soil with good permeability, loose and deep soil, the best porosity in the soil is more than 10%, the oxygen content in the soil is controlled above 6%, the organic matter content in the main root distribution layer of fruit trees is 5%, and the PH value in the soil is 6-6.5 is the best.

If there is too much water in the soil, soil consolidation will cause insufficient oxygen content in the soil, resulting in a large amount of hydrogen sulfide, nitrous acid, ferrous oxide and other harm to the root system, resulting in root rot and affecting the growth of fruit trees.

3. Moisture

The air humidity for planting grapefruit trees is best controlled at about 75%. During the growth stage of grapefruit trees, the soil moisture had better be kept at about 60% of the field capacity. If the water content is less than 40-50% of the field capacity, the leaves will curl leaves. If the soil moisture is too much, the oxygen in the soil will be insufficient, affecting the growth and development of the root system.

Grapefruit plantation planning

1. Site selection and planning

Grapefruit seedlings are vulnerable to freezing. To grow pomelo trees, choose places facing the sun and leeward. Mountains or houses in the north, unobstructed slopes or courtyards in the south are the best places to plant grapefruit.

If conditions permit, we can build houses at the top of the plantation to develop aquaculture, and use livestock manure to fertilize the orchard to improve the quality of the fruit.

2. Planting density

If planted on sloping land, row spacing and plant spacing should be controlled at 3 × 4m. If planted in flat land and courtyard, row spacing should be 4 × 4m. Reasonable planting density can promote the better growth and development of grapefruit trees.

3. Digging holes

Whether in the hillside field or in the flat-bottomed courtyard, the hole is generally 1.2m wide and 1m deep.

4. Spread the base fertilizer

Fill the hole with soil miscellaneous fertilizer, spread 3-4 jin of vegetables in the middle layer of each hole, or 2-3 jin of potassium sulfate compound fertilizer, or 3-4 jin of organic compound fertilizer, or 5-6 jin of chicken manure, and then cover the soil above.