Seedbed seedbeds should be selected to protect the sun, smooth drainage, no wilt, Verticillium wilt cotton fields. A good ditch around the seedbed is opened so that the bed height is high. The thickness of the bauxite layer is 10-12 cm. The fine sand soil is preferred for the bauxite. The structure is loose, and the nitrogen, phosphorus and potassium nutrients are complete, containing more than 1.5% organic matter. Seedbed fertilizer requires a combination of organic fertilizer and inorganic fertilizer. After the fertilizer is applied, it must be combined with soil preparation to fully mix the mud. At the same time, prepare the cover mud, choose rice straw, break it up and remove impurities.
The time for making fine plants should be 1-2 days before sowing, and hot sowing should be encouraged. Choose a 7-centimeter or so bowl-making device and make it 3-5 days before sowing. The clay should be filled with water every other day. Before the preparation of earthworms, sprinkle soil with hay ash or quicklime to sterilize and kill underground pests.
Sow fine sowing and fine weather soaring so as to facilitate the broadcast of full seedlings. Use a spray bucket to soak nutrients until the bottom is oozing out. Each podcasted cotton seed 1-2 seeds, after sowing with a thick sandy loam cover 1-1.5 cm thick, filled with fine soil between the daytime. The depth of sowing should be suitable, sowing too deep, the germ is difficult to penetrate the soil layer; too shallow, the seeds exposed to the soil surface or the soil around the seeds quickly dried, so that the seeds can not suck enough water to germinate, will affect the germination of cotton seed and Emergence.
After the seedlings are sowed, heat preservation and moisturizing are required to prompt the emergence of seedlings. The pre-Qiao Miao film is generally sealed to maximize the temperature inside the greenhouse. Seedlings can be gradually emerged 7-10 days after sowing.
Yihua Controlled the cotton seedlings to be sprayed with 2 to 2.5 kg of water with a “strength hormone†1 meter per acre seedbed before the cotyledon of the cotton seedling was flattened until the dew-hearted leaves were reached, so as to achieve the purpose of control and promotion. The oil seedlings are transplanted with a longer seedling age. If the growth is too prosperous, they can be controlled for a second time 10 days before planting.
The temperature of the controlled temperature cotton seedbed should be controlled at 25-30°C, and the maximum temperature should not exceed 35°C. 4-5 days before transplanting, day and night removal of membrane seedlings. Since the temperature is relatively high in the middle and late of May, shelters should be used mainly before planting. In the event of sudden disasters, the shed film should be covered in a timely manner to prevent death due to plague.
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