Growing pineapple in greenhouse in North China
It usually takes about a year for pineapple to blossom and hang fruit. Pineapple is also suitable for planting in flowerpots, which can not only make full use of the space under trees, but also can be sold as bonsai in flower and fruit period, which has high ornamental value and economic benefits. Planting in the north should be carried out in solar greenhouses or multi-span greenhouses with heating facilities. Main points of cultivation techniques: 1. Planting. Pineapple is suitable to grow in acidic soil environment, and the planting period from March to September is better, and the planting mode is double-row and three-row. Planting density: double row plant spacing 20 × 50 cm, border and furrow width 1.5 m, three row plant spacing 25 × 45 cm, border and furrow width 2 m. 2. Temperature management. The growth of pineapple likes to be warm, and it is the most suitable for pineapple to grow at an annual average of 24-27 ℃, can grow in the range of 15-40 ℃, grow slowly below 15 ℃, and 5 ℃ is the critical temperature for cold injury. 3. Light management. The fruit grows well under sufficient light, the fruit has high sugar content and good quality. The light is too strong and accompanied by high temperature, and the leaves and fruits are easy to burn. After removing the greenhouse film in summer, the shading net should be used for proper shading. 4. Water and fertilizer management. The amount and proportion of pineapple fertilizer application vary greatly from place to place, which should be determined according to the actual situation. The application ratio of nitrogen, phosphorus and potassium is about 3:1:2, and the annual amount of nitrogen, phosphorus and potassium per mu is 3550kg, 1440kg and 1350kg per mu. 5. Flower and fruit management. The natural budding rate of pineapple is not high, so ethephon is often used to promote flowering. After more than one year of full growth, the plants with about 35 fully grown leaves can produce fruits of normal size after flowering. 6. Pest control. Introduce the north greenhouse to cultivate rare diseases and insect pests.
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Experience of off-season and high-yield cultivation of pineapple
Pineapple cultivation has two rows, three rows and four rows. Double-row type, commonly used borders and grooves with a total of 150cm width, double-row single-plant arrangement. Its advantages are: the furrow is wider, the fibrous root can expand outward, the plant spacing on the border is more uniform, the stem base is squeezed against each other, the leaf extends into a hemispherical surface, it can make full use of sunlight, and it is easy to form between rows.
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Cantaloupe cantaloupe is suitable for protected cultivation in southeastern China.
1. Construction of greenhouse production line 1. Greenhouse structure: the greenhouse is made of arched plastic with a longitudinal pipe and four card grooves of 6.5m × 30m. The height of the shed is 3.2m, the height of the shoulder is 2.0m, the distance between the arches is 60cm, and the foot of the shed is inserted into the underground 35cm. A pressing groove is installed at the inflection point of the shoulder height of the greenhouse and at the 20cm of the foot of the shed from the ground.
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