Forage: The main cultivation techniques of European chicory
[soil preparation and fertilization]
Because the chicory seed is small (the weight of a thousand seeds is 0.96 grams), the soil surface should be fine and flat on the basis of deep ploughing, and 2500 to 3000 kg of barnyard manure per mu should be applied while ploughing the land.
[sowing]
① sowing time: chicory is perennial, so the sowing time is not limited by the season. Generally, it can be sowed from April to October, and can be sowed above 5 degrees Celsius.
② sowing rate: chicory seeds are small, the general sowing rate is 400g ~ 500g per mu, the transplanting rate is 100g ~ 150g per mu, and the sowing depth is 1cm ~ 2cm.
③ sowing method: sowing, strip sowing or seedling transplanting. If raising seedlings and transplanting, generally transplanting at 3-4 leaflets, the distance between rows and plants is 15 cm × 15 cm square. When sowing, mix the seeds and fine sandy soil and increase the volume to ensure the uniform sowing of the seeds. After sowing, watering or proper irrigation to maintain a certain moisture of the soil, generally 4-5 days to produce seedlings.
[field management]
① weed control: the seedling growth rate is slow, in order to prevent the harm of weeds, can be used to remove Monocotyledon herbicides spray, when chicory grows, there is generally no weed harm.
② watering and fertilization: chicory is a kind of leaf vegetable feed, which has a high demand for water and fertilizer. One month after seedling emergence and after each cutting, quick-acting fertilizer is applied in time to ensure rapid regeneration.
③ timely cutting use: generally, the plants can be cut when the height reaches 50 cm, and the stubble is about 5 cm, which should not be too high or too low, and can be cut every 30 days.
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The red spider of rhododendron
The female adult is about 0.3 mm long, dark red, nearly oval, the back of the body is raised, 4 pairs of dark red; the male adult is 0.25 mm long, cuneate, flattened bright red. The adults overwintered in the root of the plant, mainly near the main vein of the petiole on the back of the leaf, propagated rapidly in high temperature, less rain and drought weather from June to July, and the damaged leaves were scorched and shedded when the damage was serious. Prevention and control method: manual control, often checked after April, found that individual leaves have red scallops
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Causes and prevention of dead seedlings of national orchid
The orchid seedling appeared scorched tip, yellow leaf, yellow foot shell, rotten heart, rotten root, rotten Reed head, and finally the whole plant died, which caused huge economic losses to the national orchid boutique investors. orchid friends have different opinions and know the orchid only when it is difficult to raise orchids. the main reasons for investigation and analysis are as follows: first, the fertilizer effect is too heavy. National orchid cultivation plant material should be thin rather than fertilizer, do not worry about insufficient fertility and add too much plant material containing fat, it is found that the cultivated soil is too fat, it should be replaced or technical treatment in time. During the period of national orchid management, if the plant can grow normally, there is no need for it.
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