High-yield Cultivation Techniques of Hong Kong Kale

1. Variety characteristics

The four seasons are mid-to-late varieties with a plant height of 40-50 cm and a spread of 30-40 cm. The base leaf is oval, with a leaf length of 27 cm and a width of 20 cm. It is dark green, the leaf surface is smooth and slightly wrinkled, there is less wax powder, and the petiole is 12 cm long. The main moss is thick, 30-35 cm high, 3-4 cm in diameter, the internodes are relatively sparse, and the interval between nodes is 4-5 cm. Moss leaves are long oval, 6-8 cm long, with white flowers. The seedling period is 25-30 days, and the harvest starts 30-35 days after planting. The main weight of the single moss is 150-200 grams, and the general yield per mu can reach 1500-2000 kilograms.

2. Cultivation points

1. Adapt to local conditions and sow seeds in time

The variety has wide adaptability, it can grow normally at 6-35℃, and the suitable temperature is 16-28℃. In the open field cultivation in Guilin area from late August to early December is the suitable sowing period, during which the sowing is easy to manage, the growth is fast and the yield is high.

2. Cultivate strong seedlings

This variety has many fibrous roots, and generally adopts a seedling bed for transplanting. The loose sandy loam soil was selected, and the former non-cruciferous plot was used as a seedbed. The land was carefully prepared, fully exposed after plowing, and rotted farm manure (5 kg/m2) was used as the base fertilizer. The general planting amount was 800 grams per mu. Before sowing, disinfect with 1000% solution of 95% dikeson wettable powder.

3. Site preparation

When the kale seedlings are 5-6 cm tall and have 4-5 true leaves, they can be transplanted and planted. Before planting, the soil shall be raked deep and broken, with a height of 20 cm, a width of 140 cm, and a width of 40 cm; the row spacing is 20 cm×30 cm, and about 10,000-12,000 plants can be planted per mu. Apply 2000 kg of rot and farm fertilizer per mu and 20 kg of ternary compound fertilizer as base fertilizer. After planting, the root water should be dripped in time.

4. Field management

This variety mainly uses its vegetative organs as fresh food, fertilization is based on base fertilizer, supplemented by top dressing. After the planting is successful, topdressing begins, and the topdressing is performed every 7-10 days, followed by the principles of thin application in the late period and concentrated application in the middle period. Apply 5 kg of urea each time. In the mid-term, when the core of the moss begins to swell and grow thick, apply 10-20 kg of urea per acre and 500 kg of rot farm manure to promote the growth of the moss and increase the yield. After each top dressing, water should be irrigated in time to facilitate the absorption of nutrients by the root system. There should be no standing water in the root group distribution area, and the relative humidity of the soil is often maintained at 80%-90%.

5. Pest control

The main diseases are downy mildew, black rot and sclerotium. Downy mildew can be sprayed with 58% metalaxyl manganese-zinc 600 times solution and 72% ketol 800 times solution. Black rot can be sprayed with 50% DT 500 times solution and 72% agricultural streptomycin sulfate 1000 times solution. Sclerotium disease can be sprayed with 50% carbendazim 600 times solution and 40% sclerotium 1500 times solution.

Insect pests mainly include aphids, cabbage worms, diamondback moths, Spodoptera litura, and yellow beetle. Imidacloprid can be used to control aphids, pectins, Plutella xylostella can be used to control the insecticides abamectin, abamectin and pyrethroid pesticides, Spodoptera litura, yellow beetle can be used to kill insects, lesbens, etc. The use of pesticides is prohibited 10 days before harvest.

6. Harvest in time

When the growth height of the main moss is equal to the height of the outer leaves, it is called "Qikouhua", which is the appropriate harvest period. The incision should be smooth and inclined during harvesting to avoid disease caused by water accumulation.

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