Preparation of flax before sowing
Land selection and soil preparation: select slightly acidic soil with deep soil layer, loose soil, strong water and fertility conservation and good drainage; Corn, wheat, soybean and beet are the best in the previous crop, and the rotation should be carried out for more than 4-5 years.
When the soil can be cultivated, it should be cultivated immediately in spring and raked in time after cultivation. Rake stubble should be thin, flat and stubble, so that the soil is fine, loose and moist, which is beneficial to the emergence and protection of flax seedlings.
Application of base fertilizer: the base fertilizer is mainly organic fertilizer, which is generally 2,000-2,500 kg. Calcium superphosphate 10- 15 kg is applied per mu, and potassium sulfate is 4-6 kg. Before soil preparation, 1 time.
Seed treatment: selecting and drying seeds to improve germination rate; Seed dressing with 0.3% thiram to control seedling diseases.
Sowing date: According to the characteristics that flax seeds germinate at 1-3℃, we can sow when the average temperature is stable at 7-8℃.
Premature low ground temperature affects seedling emergence and even rotten seeds; Too late will affect flax production.
Sowing amount: mechanical drilling is generally used, and cross-sowing is carried out after sowing with 7.5cm or 15cm drilling machine.
The sowing amount per mu is 6-8kg, and 300,000-450,000 seedlings are protected per mu.
Sowing depth: According to soil moisture and texture, the suitable sowing depth is generally about 3 cm.
Plots with good soil moisture and night tide should be shallow but not deep; For plots with poor soil moisture and rough soil preparation, sowing should be deeper, but not more than 3.5 cm, otherwise the emergence rate will be reduced.
Field management of flax
Weeding: flax seedlings grow slowly, and the growth rate of weeds in early spring is almost 10 times that of flax. If you don't weed in time, there will be a shortage of grass.
Chemical weeding can be used. When the plant height is 3-4 cm, 200-300 g of 20% naproxen, 50-70 g of 70% dimethyl carbon tetrachloride and 30-40 kg of water can be added per mu, and monocotyledonous weeds and dicotyledonous weeds can be removed at the same time, and the sloppy removal can reach 85%-90%.
Top dressing: Top dressing is mainly nitrogen fertilizer.
Application of seedling fertilizer: combined with 1 irrigation, topdressing urea 5 kg per mu.
Application of sprouting fertilizer: When the seedling height is 15-20cm, the top of flax will be arched, and it will enter the synchronous period of vegetative growth and reproductive growth, and topdressing urea will be 8- 10kg per mu.
If flax seedlings grow vigorously and are not short of fertilizer, less or no sprouting fertilizer can be applied.
Irrigation: According to the water demand characteristics of flax, the first 1 time water is usually irrigated when the seedling height is 6- 10 cm, and the first water is irrigated with small water to avoid damaging flax seedlings; Irrigation for the second time before flowering to meet the rapid growth of plants and the water demand of peach blossoms; After the flax blooms, depending on the weather conditions, such as drought and cracks in the soil, it should continue to be lightly watered, but it should be prevented from lodging to avoid reducing production.
The harvest period of flax has a direct impact on the yield, and the harvest period of flax is the late yellow maturity.
The standard is that the lower leaves turn yellow, some leaves fall off, 50%-60% capsules turn yellow and some turn brown, and only a few seeds are slightly sticky, so flax can be harvested.
Hu Tianle-Ma Lao Herbicide Kit produced by Shuntian Agriculture is a professional post-emergence herbicide in flax field with high efficiency and broad spectrum.
Weeds, such as cabbage, Commelina communis, sonchus, flower bowl, barnyard grass, wild millet, bitter buckwheat, green bristlegrass, crabgrass, cattail, purslane, amaranth retroflexus and Artemisia scoparia, have good control effect.
Suitable crop: flax field
Usage: A set of this product must be diluted twice before use. First, dilute the two bottles in the bag with 500~600ml water into mother liquor and divide it into three parts.
Spray the stems and leaves of weeds once per serving.
Packing specification: 240g (100g+100g+40g)/set.