1. Preparation for farming

One to two months before planting, dig a 50cm×50cm×50cm planting hole on each side of the cement column, and apply 15kg of decomposed chicken manure into each hole ( Or 30kg of pig manure) + 1kg of lime as base fertilizer, mix with soil in a ratio of 1:1 and backfill to 20cm above the ground, and then return the decomposed topsoil to 20-25cm above the ground. Wait for 2 to 3 heavy rains and the soil mound to sink before returning to 3 to 5cm of decomposed topsoil before planting.

2. Planting

The planting time is from March to April every year. At this time, the planting light, water and temperature are all suitable for dragon fruit to grow rapidly, and it will bloom and bear fruit after May of the following year. The seedlings are planted about 25cm away from the cement square pillars, with one plant in each hole around the cement pillars. When planting, dig a planting hole with a depth of about 6cm on the mound, insert the seedlings, spread the roots, then cover with a layer of topsoil and compact it firmly, and shape the tree pot into a high-inner, middle-low, and edge-shaped tree pot. Make a round tree pot that retains water and fertilizer, cover it with grass and weeds, and pour enough root water. When planting, do not let the fibrous roots of the seedlings come into contact with organic fertilizers.

3. Fertilizer and water management

(1) Fertilizer and water management for young trees

Young trees (1 to 2 years old) mainly use nitrogen fertilizer, so apply it frequently and lightly. Apply to promote plant growth. One month after planting, when the plants begin to grow new buds, lightly apply 10 times diluted dung water + 1000 times urea solution, 1 spoon per plant, 10 cm away from the tree head in the tree pot, and apply drench every 15 to 20 days. 1 time. 6 months after planting, apply 3 times diluted manure + 800 times urea solution (or spread 100-150g of compound fertilizer per plant within 10-15cm from the tree head in the tree basin on rainy days), 1 scoop per plant, Apply drench or hole application 15cm around the tree head, once every 20 to 25 days.

(2) Fertilizer and water management for adult trees

Adult trees (more than 2 years old) should apply Organic fertilizers are mainly used, and chemical fertilizers are supplemented. In March, July and November every year, 5.0kg of decomposed chicken manure (or 7.5kg of pig manure + 0.5kg of peanut bran + 0.25kg of compound fertilizer) is applied to each hole. Each batch of young fruits can be sprayed with foliar fertilizers such as 800 times of nucleotides or amino acids twice each from the roots to increase tree nutrients and improve fruit yield and quality.

4. Plastic pruning

(1) Pruning of young trees

In order to promote the rapid growth of seedlings to form a crown so that they can be put into production the following year, in addition to applying sufficient base fertilizer and In addition to water and fertilizer, the new buds of newly planted pitayas were thinned and pruned during the seedling stage. When each batch of new buds are extracted to form bud points, all side buds are wiped out, leaving only one strong upward-growing bud in each seedling to facilitate concentrated nutrient growth and quick release. Use soft cloth strips to tie the new shoots to a point on the cement pillar every 30cm, and let the stems and vines grow upward along the cement pillar.

When the stems and vines exceed 10cm of the cement round pot, cut off the top buds to promote their branching. When selecting buds, keep 3 to 4 outward-growing stems and vines that are strong and have basically equal angle distribution. The new shoots serve as first-level branches and are allowed to grow naturally along the perimeter of the cement circle. When the first-level branches grow to about 35-40cm, the top buds are cut off to make them mature quickly to promote their sprouting and branching; for the second-level branches, 3-4 new buds are left on each branch and allowed to droop and grow. Cut short at 40cm to promote branching, and stop fertilizing after the third batch of new shoots turn green and mature in March-April of the following year.

(2) Pruning of adult trees

Pruning is done twice a year, in spring and autumn. The first pruning is from February to March. It mainly cuts off diseased and weak branches, overly dense branches, short and leggy branches and overly long fruiting branches to reduce nutrient consumption and promote light, accumulate nutrients, and preserve the flower bud differentiation and flowering of the branches. The result is a good foundation. The second pruning is performed after picking fruits from late November to December. It mainly removes old branches, diseased branches and overly dense branches that have been bearing fruit for many years, and retains evenly distributed strong branches to promote their sprouting, growth, development and maturity for the following year. Be ready for flowering and fruiting.