Vegetable dwarf cultivation technique

Selection of seedlings, edible citrons should use "red oil 椿", "red bud green citron" and "Hongxiang No. 1" and other varieties. These varieties have early germination, low temperature tolerance, and the buds and tender leaves are brownish red. The leaves are crispy and juicy, sweet and fragrant. In March, the soil was simmered, the width was 1.5 meters, and the seeds were soaked in warm water of 30-35 °C for a day and night. After being germinated at 25 °C, the seeds were germinated and planted, and the amount of seeds used was about 1.5 kg. After sowing, cover the soil, pour enough water, cover the mulch or straw, moisturize and keep warm. Remove the cover after emergence. 3-4 months seedlings 2-3 leaf time seedlings, plant spacing of about 15 cm, between the emergence of another seedling. 5-6 months loose soil, fertilization, weeding, 7-month-month application of nitrogen fertilizer, combined with phosphorus, potassium fertilizer, combined with loose soil, weeding.

Timely planting of camphor gardens should choose plots with loose soil, deep soil layers, sandy soil, and convenient irrigation and drainage. After deeping the land, 5-7 tons of decomposed organic fertilizer will be used as the base fertilizer. The planting period of the camphor is from deciduous to pre-emergence, and autumn planting and spring planting can be used. Generally, the planting density is 40 cm 50 cm, and about 3,000 plants are planted in acre. When planting, it should be deeply planted, the roots stretched, the soil is compacted, and the water is poured 1-2 times.

If the seedlings of dwarf plastic surgery are not dwarfed, they should be flattened, that is, the top of the seedlings is cut at 15-20 cm, and the lower 2-3 side branches are promoted as the first side branches. When the first side branch is longer than 30 cm, the top tip is cut off, and the 5-10 cm branch is retained to promote the secondary side branch.

Dwarf treatment has methods such as topping, short cut and peace. From June to July, the annual branches are topped or short-cut, leaving 15-25 cm, 2-5 side branches can be drawn in about 20 days, and the deep branches growing in 10-15 cm in autumn, and the buds can be harvested in the next year. . For overgrown plants or shoots, you can pick the heart again. After topping and short cutting, the amount of buds can be increased and the yield can be increased by 1.5-2 times.

After the field management is planted, water is poured once, and water is poured once every half month to keep the soil dry and wet. Watering or weeding and weeding in time to prevent water accumulation. 4-5 months and July, each time chasing fertilizer, 10-15 kg of urea per mu; applying nitrogen fertilizer and controlling watering after August; applying calcium phosphate once in September, applying 50-60 kg per acre. To promote plant lignification and increase cold resistance. In the end of February each year, the mulch is covered in the roots of mature trees to promote early germination. 3-5 days before the first harvest, apply 20-25 kg of urea per acre, and when the new shoot length reaches 30 cm, spray 0.2-0.3% urea or potassium dihydrogen phosphate solution 2-3 times outside the root dressing. Alternate use. From June to July, after a large number of picking, it should be topdressed 2-3 times, and 20-25 kg of compound fertilizer per acre. After the leaves are combined, the deep turn is combined, and the organic fertilizer is used as the base fertilizer.

Toona sinensis has strong disease resistance and few pests and diseases, mainly leaf rust, root rot and spotted wax mites. It should be mainly based on agricultural control, supplemented by targeted chemical control.

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