Use of protected land in winter to plant wet cress

Cultivation mode

Compared with Sunan, there is less rainfall in Xuzhou and there is a lack of irrigation water. The irrigation cost of planting flooded cress is higher. Wet-planted cress is a water-saving variety in aquatic vegetables. It is not necessary to maintain the water layer during the growth period, as long as the soil is sufficiently moistened, and it is suitable for cultivation in low-lying fields. Judging from the planting situation in recent years, wet planted cress is mainly suitable for the following two planting methods in Xuzhou.

1. Plastic greenhouses cover cultivation. The height of the shed is required to be more than 1.5 meters and covered with haystacks during wintering season. Cress is planted in mid-September and harvested in mid-December, with plants up to 50 cm. After fertilizing and watering after harvesting, the second crop is harvested in the second and third quarter of the next year, and the plant height can reach more than 60 cm. The total output of two pods per mu is 3,600 kg.

2. Plastic small arch cover cultivation. Covering with a small shed, the amount of early growth is basically the same as that of greenhouse mulching. After November 30th, as the temperature is lowered, the growth is extremely slow and the growth is small. If grass covered without grass mulch, it is prone to frost damage and it cannot be formed in winter. Product output. After February 15 of the second year, with the temperature rising, the growth was accelerated. The harvest yield per mu in the middle and late March was 1900 kg, which was 1700 kg lower than that of greenhouse cultivation.

In adaptive cultivation, we also conducted a small area of ​​open-field cultivation experiments. Since the winter temperature in Xuzhou is relatively low (minimum temperature is around -10°C), the leaves and stalks of wintering cress till November 30 are all frozen. Can not normally winter. During the wintering of wet planted cress in northern Jiangsu, it is necessary to protect the land. Among them, cultivation in large and medium sheds is good, and grass mulch is covered at the same time. It will be listed during the New Year's Day to the Spring Festival, and will be overtaken by the small arch sheds. The final output will be 40% higher. about.

Cultivation Techniques

In order to ensure the quality of wet planted cress, it is advisable to transplant seedlings in Xuzhou.

The mother stem is usually germinated about 10 days before the nursery. The old mature stems (about 1 cm in stem diameter) are harvested from the remaining fields and bundled into small bundles. The wells are piled under the shade of trees and the stack height is no more than 1 meter. Use a shade net to cover the shade, and spray cool water 1 time in the morning and in the evening to keep the temperature in the pile at 23-25°C. Turn the piles when appropriate.

When planting wet seedling cress seedlings in Xuzhou area, the seedling density can be appropriately increased. Generally, the distance between mother stems is controlled at 2-3 cm. In order to prevent sun exposure, it is necessary to keep the fields fully moist and dry.

When the seedlings are transplanted at a height of about 10 cm, they can be uprooted and transplanted at a distance of 10-12 cm to open or sheds. After transplanting, it should be filled with water, and the soil should be kept moist before the live tree. After the live tree is supplied in an area with sufficient water supply, a thin layer of water can be kept or the water in the canal can be filled with water.

Before fertilization and planting, 100,000 kg of composted manure and 20-30 kg of compound fertilizer were used as base fertilizer per acre. After the live tree, 10-15 kilograms of urea can be topdressed. Using large- and medium-sized sheds, nitrogen fertilizers should be added in time after each harvest, and phosphorus and potassium fertilizers should be topdressed appropriately.

Water Management Wet planted cress is a water-saving vegetable that keeps the soil moist enough during the growing season. Protected cultivation can be properly irrigated in winter, but it is not appropriate to irrigate the cool river, so as to avoid sudden temperature drop. In the second spring, there should be no clear water layer in the field, just keep the soil moist.

Diseases and Insect Pest Control Watercress is a kind of leafy vegetable, coupled with high soil moisture and poor ability to degrade pesticides. The prevention and control of pests and diseases should be based on agricultural control, strengthen scientific management, and enhance plant disease resistance. For pesticide control, plant-sourced pesticides and biological pesticides are preferred. If chemical pesticides are used, high-efficiency, low-toxicity, low-residue pesticides should be selected, and the dosage should be strictly controlled to ensure safety intervals.

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