1, seed selection

The first thing before germination is of course seed selection. It is best to choose the seeds of local jackfruit varieties with strong resistance and adaptability. Fresh seeds peeled from fruits should be selected for less than 48 hours. The seeds are required to be mature, full, smooth and without spots. No trauma, no pests and diseases. With such healthy seeds, the germination rate can be guaranteed. After seed selection is completed, seed treatment is carried out. ?

Step 2 wash the seeds

The first step of seed treatment is seed cleaning. The selected seeds should be immediately put into clear water and rubbed by hand for 2-3 minutes. Scrub the pulp and sugar on the fruit. Sowing again will not cause ants to invade, and there will be no other pests and diseases.

3, seed sterilization and disinfection

After washing the seeds, they should be disinfected. Disinfectant is carbendazim 500-800 times and new high-fat film 800 times, and 15 kg water is added to the prepared liquid medicine. Pour the seeds into the liquid medicine and soak for 2-3 minutes. Next, get ready for germination in the sand bed.

Step 4 make a sand bed

The area of sand bed can be determined according to the number of seeds. Fine river sand should be used as the bud bed. The humidity requirement is 25%. River sand is qualified only if the hands are not sticky and can be dispersed immediately. First, spread the sand with the thickness of 10- 15 cm as the bottom sand, and scrape it off with a thin board. In order to facilitate management, it is generally made into a bed surface, with a length of 10 m and a width of 1 m.

5, accelerate germination

Spread the bottom sand, and slowly spread the treated seeds on the sand bed, so as not to hinder germination. After laying the seeds, cover them with a layer of sand. The thickness is about 2 cm. Next, cover a layer of dry weeds on the bud bed to achieve the purpose of further shading and moisturizing, and also have the effect of warming.

6. Sand bed management

If the temperature is between 18-30℃, it is enough to accelerate germination for about 20 days. If the weather is 8- 18℃, it takes about 35 days to accelerate germination. To observe the dry and wet conditions of the sand bed, water should be sprayed in time. The watering frequency is uncertain, and the principle is to keep the soil surface moist. After budding, uncover the weeds. At this time, you will see that the bud has grown to 3-5 cm high.

Extended data

Boromo, a tropical tree species, has a life span of more than 100 years, is positive and grows rapidly. It is suitable to grow in areas where the annual average temperature is above 22℃, there is no frost, and the annual rainfall is above 1, 400 ~ 1, 700 mm Seedlings and young trees are sensitive to low temperature, usually their leaves will freeze around 0℃, and it will rain continuously below 10℃.

It has wide adaptability to soil, grows well in deep and fertile soil, avoids water accumulation, and needs to choose flat land with good drainage when planting. Regardless of soil quality, sandy soil with deep topsoil is the best. If the soil is fertile, it will grow quickly. Good drainage and plenty of sunshine are needed.

Trees with few fibrous roots are not resistant to transplantation. If you need to transplant, you should cut off and trim the branches and leaves before transplanting, especially in autumn and winter. The growth period is spring and summer, with topdressing every 1 ~ 2 months/time and sufficient water supply, so the trees are very extensive. Sex likes high temperature and high humidity, and the suitable temperature for growth is 22 ~ 23℃.

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