How to select passion fruit seeds? What are the seedling-raising methods?

Passion fruit is a very popular fruit at present, with a very rich vitamin content and extremely high medicinal value; it is sweet and sour and tasty, and is known as the "king of juices." At present, the economic value of passion fruit on the market is also very considerable, and demand exceeds supply, with many farmers planting it. So how do you select passion fruit seeds? What are the seedling-raising methods? Now let's take a look together with the editor.

1. How to select passion fruit seeds?

First, choose large and healthy passion fruits, and they must be ripe. If you feel the passion fruit is not quite ripe, you can leave it for a few days before taking the seeds; this way the success rate of sowing the seeds will be somewhat higher. Wash the extracted passion fruit seeds clean, then dry them in a cool place and keep them for later use.

2. What are the seedling-raising methods for passion fruit?

1. Raising passion fruit seedlings from seeds

Passion fruit seeds have no dormant period and can be sown right after harvest. Seed propagation can be carried out all year round, but sowing in spring and autumn is best. Select plants with robust growth, no pests or diseases, and high and stable yields as mother plants; harvest fruit that is well shaped, slightly heavy, and fully ripe; take out the seeds, remove the aril, wash them, dry them in the shade, and sow as soon as possible. Soaking and fermenting in water for 3 to 4 days, or putting them in a bottle with coarse sand and shaking it, or rubbing the seed coat with sandpaper can increase the speed of seed germination.

When sowing, mix 1.5 kg of seeds per mu with 15 to 30 g of Duomiaoling for about 20 minutes, use river sand as the substrate, then spread the seeds evenly on the seedbed, cover with a thin layer of grass, and water thoroughly. Passion fruit seeds generally need about 20 days to break the shell and sprout, and the optimum germination temperature is 24C. When the temperature is below 15°C, plastic film should be used for covering to keep warm and moist, and the soil should be kept moist throughout the seedling stage. After sowing, water according to the weather; on sunny days, spray water once in the morning and once in the evening, and after about half a month they begin to emerge.

When more than 80% have emerged, topdressing should be done in time. Dilute manure water or a dilute urea solution of 0.3% or less can be splashed on to cultivate strong seedlings. After the seedlings grow 2 true leaves, spray with a 0.1% carbendazim or thiophanate solution once every week, for 2 consecutive sprays. To improve planting survival rate and facilitate transport, when the seedlings grow 1 to 2 true leaves, they can be planted in bags. After the nursery stock grows 4 true leaves (bare-ground seedling raising) to 8 true leaves (bagged seedling raising), they can leave the nursery and be transplanted to the field.

2. Raising passion fruit seedlings by cuttings

Most of the widely planted purple-fruit varieties are hybrids, and seed propagation shows great variation, so vegetative propagation methods such as cutting propagation should be used in large-scale production. The branches selected for passion fruit cutting propagation should contain relatively high carbohydrates and an appropriate amount of nitrogen nutrition, which has a good effect on rooting. Therefore, it is better to choose sunny, robustly growing, mature one- to two-year-old branches as cutting material.

Cut the passion fruit cuttings into pieces with 2 to 3 nodes; the lower cut should be slanted parallel to the bud, and the distance between the cut and the node should preferably be 1 cm; the upper cut can be left about 3 cm from the node. It is best to have 1 whole leaf, and it is even better if there is a 0.5 to 1 cm young shoot in the leaf axil. Choosing such cutting material not only helps early rooting, but after rooting, the new shoots sprout and grow relatively quickly, and the survival effect is clearly better than cuttings without leaves or with half a leaf.

After the cutting material is cut, it is best to soak it in Abr rooting powder at 25 mg/kg water solution for 30 minutes, then insert the cuttings, with the insertion depth reaching 2/3 of the length of the cutting. Under normal conditions, passion fruit cuttings root 20 to 30 days after insertion, and the seedling formation rate can reach more than 80%. They can then be planted into plastic bags of soil, and after they resume growth, they can be planted out in the field, or the cuttings can even be directly cultivated in plastic bags (cups) of soil.

The above is an introduction to passion fruit. When planting passion fruit, farmers must choose the main varieties to cultivate according to the characteristics of the passion fruit variety and the local climate conditions.

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