There are several propagation methods of soft-seeded pomegranate in Tunisia, such as sowing, cutting, rooting, grafting and layering propagation, but cutting and sowing propagation are the main methods.
1. Preparation of nursery land for cuttage propagation of soft-seeded pomegranate in Tunisia: The nursery land should be light soil or sandy loam with convenient transportation, convenient irrigation and drainage, deep soil layer, loose texture and good water storage and fertilizer conservation performance. Level the land and make a seedbed for later use. Cutting time: spring, summer and autumn. Spring should be carried out from late March to early April, and cuttings should be selected for 2 years. Cutting in summer and autumn was carried out in June-July and June 10, respectively, and the cuttings were semi-lignified branches of the same year. Cuttings are strong, plump, with strong growth potential and no pests and diseases from the periphery of the crown of the fruit mother tree with pure varieties and strong development. Cut the branches into 8- 15cm long, with the upper incision cut flat and the lower incision cut obliquely. Soak the lower ends of branches with 95% industrial * * to remove tannin and other substances that are not conducive to the survival of cuttings. After that, put the cuttings into flowing water for 5- 10 minutes, and then immerse the lower ends of the branches in 50mg/L GGF (green plant growth regulator) solution 1 hour. Cutting: The treated cutting is buried in the cultivation soil according to the plant spacing of (8- 10)cm× 15cm, and the lower part 1/2-2/3. Compacting the soil on both sides of the cutting by hand, and watering it once to make it permeable. Post-cutting management: the key point of management is to control the temperature and humidity of air and soil, and try to keep the cuttings fresh without losing water. The main measures are shading, moisturizing and cooling. 1) shading: generally, a shading frame should be set up before cutting, and the shading net should be covered immediately after cutting. The light transmittance of the sunshade net is 20%-30%. Curtains should also be hung on the east and west sides of the seedbed to keep out the sun in the morning and evening.
2. Moisturize Tunisia soft-seeded pomegranate: build a plastic arch shed immediately after cutting. Plastic shed can adjust the temperature and humidity of air and soil and provide the best growth environment. In the early stage of cutting, the water consumption of cutting is low, and it is usually watered once every 7- 10 day. After a month, the cuttings began to take root and sprout, and the water consumption gradually increased, and they were watered every 3-5 days. The amount of watering depends on soil humidity and air humidity. The optimum growth condition of pomegranate is that the relative humidity of air is 80%-90%, and the soil moisture is about 80% of the field capacity.
3. Tunisia soft-seeded pomegranate cooling: the best ground temperature should be kept at 20-25 degrees Celsius. In the case of high temperature, the temperature must be reduced. There are three measures to cool down, one is shading, the other is ventilation and the third is watering. On a hot sunny day in summer, both ends of the plastic shed should be opened in time for ventilation and cooling, and it should be covered tightly at 7-9 pm to maintain humidity. In addition, spraying water on cuttings and watering plastic greenhouses can also play a role in cooling down.
4. Fertilization of soft-seeded pomegranate in Tunisia: The principle of fertilization is to apply thin fertilizer frequently. Cutting, cutting 10 months to take root, and then spraying 0.25% urea on the leaves every half month. After cutting for 3 months, the amount of fertilizer can be increased as appropriate, and 3%-5% fishy water (waste fish viscera, etc. plus 10 times water) can be poured once a month. , and can be sealed for more than half a year), and then rinse with water once the next day; Or water 3% decomposed rapeseed cake once a month.
5. Weeding of soft-seeded pomegranate in Tunisia: Weeds in the nursery should be removed in time. When weeding, it is necessary to prevent roots from damaging seedlings.
6. Hardening of soft-seeded pomegranate seedlings in Tunisia: 3-4 months after transplanting, properly extend the ventilation and lighting time to improve the adaptability of seedlings to the external environment.
7. Transplanting soft-seeded pomegranate seedlings in Tunisia: In the following spring, cuttings can be transplanted to nursery or flowerpot for planting. 2. Tunisia soft-seeded pomegranate seeds have strong germination ability, and a large number of seedlings can be obtained by sowing and propagating. Seed collection: picking mature fruits from August to September, taking out the seeds, rubbing off the exocarp, airing and storing, or mixing the seeds with river sand at the ratio of 1: 5. Sowing: Sowing in February-March. Soak the seeds in warm water at 40 degrees Celsius for 6-8 hours before sowing, and then sow after the seed coat swells, so as to facilitate the seeds to germinate in advance. Sow the soaked seeds on the cultivated soil according to the row spacing of 25cm, then cover the soil 1- 1.5cm thick, cover the grass and water it once. After that, keep the soil moist, control the soil temperature at 20-25 degrees Celsius, and buds and roots can be produced after about 1 month. Seedling management: when the height of seedlings is 4cm, the spacing between plants is 6-9cm. After weeding in June-July, dilute manure is applied once and phosphate fertilizer is applied once in August. Drought resistance in summer and frost resistance in winter. Transplanting after defoliation in autumn to before germination in the following spring. Yin He Tunisia Soft-seeded Pomegranate Nursery Manor is dedicated to the cultivation of pomegranate trees, with excellent varieties, good tree shape, good fruit taste and high nutritional value.