Live breeding refers to the method of directly seeding seedlings with walnut seeds, but its offspring have fewer advantages, less deterioration, and slower results, and are only used to cultivate rootstocks for grafting. Conventional selection is carried out in six steps: seed selection, seed treatment, nursery preparation, sowing, nursery management, and seedling emergence.
1. Select seeds that are full, large, fully mature, and free of pests and diseases.
2, seed treatment autumn sowing can be accompanied by mining, that is, with green skin sowing. In the spring sowing, germination treatment is required. The seeds are soaked in cold water for 5 to 7 days, and then exposed to sunlight for 2 days. Most of the seeds can be sown when there are cracks.
3, the preparation of nursery land generally choose thick soil layer, soil moisture and nutrient is sufficient, the slope conditions suitable for the nursery to the ground, and reasonable layout, intensive cultivation. The nursery ground is sterilized and sterilized. The fungicide can be used in formalin, and insecticides can be used for seismic Dan or trichlorfon crystals.
4, sowing and sowing can be divided into autumn and spring sowing. 1 Autumn sowing is followed by seeding and seeding, and the seedlings are early and relatively neat. 2 Spring sowing is carried out from January to March. 3 seeding method and density, first apply 100 kg / mu of compound fertilizer, and then on-demand, plant spacing 10 ~ 15 cm, line spacing 25 ~ 35 cm, on the spot when the seed suture line perpendicular to the ground, flat bottom of the ditch, cover soil about 6 cm , once again irrigated.
5, nursery management 1 do a good job in anti-rat. 2 In the spring, when the temperature is raised, the water is kept in time, and the soil moisture is kept at about 70%. 3 cultivating weeding, chasing fertilizer, improving growth conditions. 4 Strengthen pest and disease prevention and control. 5 Use a broken root shovel at a distance of 15 to 20 cm from the base of the seedlings, and insert obliquely at a 45° angle to the ground to cut the main root and promote lateral root growth.
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American Type Heavy Duty Industrial Caster
American Type Heavy Duty Industrial Caster
American Type Heavy Duty Industrial Caster
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