How do you grow guava? Share the growth environmental conditions and planting techniques of guava!

Guava is also known as guava, chicken yaguo and so on. Native to tropical America, it was introduced into tropical and subtropical regions from 16th to 17th century, and was introduced into China at the end of 17th century. Now it is cultivated in Taiwan, Hainan, Guangdong, Guangxi, Fujian, Jiangxi and other provinces. So specifically, how to grow guava? Below, I would like to share with you the growth environmental conditions and planting techniques of guava.

I. requirements of guava for growth environment

1. Temperature

Guava is native to the tropics and is afraid of cold. At minus 1mi 2 ℃, the young trees died from freezing injury. Adult trees begin to show frostbite. The cold tolerance of general varieties is weaker than sweet orange, but stronger than papaya and banana. The average temperature of the coldest month for the growth of guava in winter should be more than 15 ℃, otherwise even if there is no frost, it will grow badly or even die due to lack of heat. The optimum growth temperature is 23 ℃ 28 min.

2. Lighting

If there is plenty of sunshine, the tree will be strong, the fruit quality is good, and there are few diseases and insect pests.

3. Moisture

It can be planted in tropical and subtropical areas, regardless of paddy field, dry land or hillside. However, in the period of fruit growth and development, proper water is needed in order to obtain good quality fruit. The most suitable rainfall is 1000ml / 2000mm.

The root group of guava is shallow and easy to be blown down by the wind, so the groundwater level of the planting land should be below 80 cm, which can promote deep root growth and enhance wind resistance.

4. Soil

Guava is not strict on soil, but it is suitable for sandy soil with deep soil layer, fertile and loose soil and good drainage. Guava has strong salt resistance. Soil pH4.5-8.2 can adapt to it. Fertilization is an important measure to maintain soil fertility and meet the nutrient elements needed for the growth and development of fruit trees. Guava blossoms and bears fruit many times a year, with long fruit period, high yield and high nutrient consumption. therefore, attention should be paid to strengthening fertilization management in order to maintain growth potential and improve soil fertility. The results showed that for every 100kg fresh fruit of guava, the nutrients taken away were 1.83 kg of nitrogen, 0.39 kg of phosphorus and 1.62 kg of potassium.

II. Planting techniques of guava

1. Garden site selection

Guava is a tropical fruit, so its anti-freezing ability is weak, when choosing to plant, it is best to choose temperate areas without frost and fog, so that guava can grow healthily.

2. Grafted seedlings

The grafted seedlings with good healing of grafting interface, full branches and buds and perfect branches of roots, stems and leaves were selected to plant.

3. Water and nutrient management

Planting guava requires irrigation of water and fertilizer all the year round, especially in the period of germination and growth, which is relatively large, so it is necessary to ensure monthly fertilization and watering, and some trace elements can be added to improve the fruit quality of guava.

4. Fruit bagging

Bagging the fruit can reduce the probability of agrochemical attachment to the fruit, ensure the health problems of the guava, and improve the fruit quality of the guava.

5. Prevention and control of major diseases

(1) blight

[symptoms] once the plant was infected with blight, the disease first appeared on the new shoots of the plant, and the new buds of the damaged branches could not be unfolded and gradually turned dark brown. When the growth stops, the unfolded leaves near the new buds turn yellow and the leaves are dull. If it is not controlled in time, it is easy to cause the disease of the connected branches, and finally develop to the base of the stem, resulting in the wilt of the whole plant.

[prevention and control methods]

As it is known that the invading Rhizoctonia solanacearum exists near the vascular bundle, drug control is extremely difficult, so the policy of prevention and comprehensive control should be carried out.

① chose disease-free seedlings to plant.

② improves the drainage and irrigation system to maintain good soil permeability and reduce the spread of bacteria.

③ diseased branches and dead plants should be cleared out of the garden and burned in time to reduce the chance of infection and transmission.

④ increased application of retting to produce rotten organic fertilizer.

The whole garden was sterilized once after ⑤ pruning and when the rainy season came.

After the onset of ⑥, cut off the diseased branches in time, spray with 80% basic copper sulfate wettable powder, spray every 10-12 days for 3-4 times, or use carbendazim, benomide and so on.

(2) anthracnose of fruit

[symptoms]

Softening water stains appeared on the surface of the ripe fruit, and then the disease spots gradually appeared brown and black in the center.

[prevention and control methods]

Spray with 50% methyl topiramate wettable powder 800-1000 times or 80% mancozeb wettable powder 600800 times. Once every 7-10 days, 3-4 times in a row.