How does Hong Kong Four Seasons Kale perform high yield cultivation techniques?

I. Variety characteristics

The four seasons are mid-to-late maturing varieties, with a plant height of 40-50 cm and an expansion of 30-40 cm. The basal leaves are elliptic, with a length of 27 cm and a width of 20 cm, dark green, smooth and slightly wrinkled leaves, less wax powder, and 12 cm in petiole length. The main moss is stout, 30-35 cm high and 3-4 cm in diameter. The internodes are sparse and the internode distance is 4-5 cm. The moss leaves are ovoid, 6-8 cm long, and have white flowers. The seedling period is 25-30 days, and harvesting begins 30-35 days after planting. The main moss weight is 150-200 grams, and the average yield per mu can reach 1500-2000 kg.

Second, the cultivation points

1. Adapt to local conditions, sowing in time

This variety has wide adaptability, can grow normally at 6-35 ℃, and suitable temperature is 16-28 ℃. Open field cultivation in Guilin area from late August to early December is a suitable seeding period, during which seeding is easy to manage, grows quickly, and yields high.

2. Cultivate strong seedlings

This variety has many roots and is generally transplanted by seedbed. Loose sandy loam soil was selected, and the formerly non-Cruciferous plots were used as seed beds. Fine land preparation was carried out. After full ploughing, sufficient sunlight was applied, and rotten farm manure (5 kg / m2) was used as the base fertilizer. Generally, the seeding amount per acre was 800 grams. Before sowing, sterilize the soil with 1000% solution of 95% dexon 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. Prior to planting, the soil is deep-turned and raked, and the hoisting height is 20 cm, width 140 cm, and groove width 40 cm. The row spacing is 20 cm x 30 cm. About 10,000-12,000 plants can be planted per acre. 2000 kilograms of rotten cooked farm manure per acre and 20 kilograms of ternary compound fertilizer were used as base fertilizers. Immediately after planting, drip foot and root water.

4. Field management

The cultivar mainly uses its vegetative organs as fresh food, and fertilization is mainly based on basal fertilizer, supplemented by topdressing. After the planting, the fertilization is started, and the fertilization is performed every 7-10 days. 5 kg of urea each time. When the moss heart began to swell in the middle period, 10-20 kg of urea per acre and 500 kg of rotten farm manure were applied to promote the growth of moss heart and increase the yield. Water should be irrigated in time after each topdressing to facilitate the absorption of nutrients by the root system. There must 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

Diseases include downy mildew, black rot, and sclerotinia. Downy mildew can be sprayed with 600% solution of 58% metalaxyl manganese and zinc and 800 times solution of 72% gram. Black rot can be sprayed with 50% DT 500 times solution and 72% agricultural streptomycin sulfate 1000 times solution. Sclerotinia can be sprayed with 600% solution of 50% carbendazim and 1500 times solution of 40% sclerotia.

Insect pests are mainly aphids, Pieris rapae, Plutella xylostella, Spodoptera litura, Spodoptera flavus, etc. Imidacloprid can be used for the control of aphids, Piracetam, Plutella xylostella, Pyrethroid, Avermectin, and Pyrethroid pesticides, Spodoptera litura, Pleurotus spp. Can be used for pest control, Lexburn, etc. The use of pesticides is prohibited for 10 days before harvest.

6. Timely harvesting

When the growth height of the main moss is flush with the height of the outer leaves, it is called "Qikou flower", which is the harvest time. When harvesting, the incision should be smooth and inclined to avoid the disease caused by standing water.

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