Early emergence of seedlings, late blocking holes When 50% of the cotton seedlings are unearthed, the cotyledons can be released in batches when they turn green. The principle of releasing seedlings: sunny morning and evening release, cloudy all-day surprise release. Some farmers do not dare to put too early, but put it too late, the cotton seedlings stay in the film for too long, it is easy to form high seedlings and diseased seedlings, in case of high temperature cotton seedlings susceptible to sunburn and death, this This approach is not desirable. Although most cotton varieties have disease resistance, they are also susceptible to illness under prolonged periods of low temperature, rain, and cold. Therefore, in the case of high soil moisture, ventilation and air drying in the late blocking and seedling hole is a powerful measure to prevent the occurrence of cotton seedlings.
Transplanting seedlings and seedlings are the basis for a bumper crop. They should seize the opportune moment for post-emergence rainfall and pay close attention to checking seedlings to make up seedlings. Mulching seedlings for plastic film can be used for transplanting seedlings with large seedlings and soil. The choice of size is consistent, with 1 to 2 The healthy leaves of the true leaves are transplanted with the transplanting device, and 13 cm of the transplanting device is used to ensure the depth of the soil.
Seedlings, Dingmiao basic seedlings immediately after the seedlings, hole sowing can remain 2 healthy seedlings, drilled seedlings to do when the leaves are not loquat leaves. Small seedlings can be completed at one time. If the seedling disease is heavier or in the saline-alkali soil, the time for setting the seedlings should be postponed appropriately, and it is advisable to have 3 to 4 true leaves for the fixed seedlings.
After the emergence of cultivating soil cotton, it is necessary to cultivate the soil in time to achieve early cultivating, diligent cultivating, deep cultivating, first shallow and deep, and deeper when the rain is low, and the depth of cultivating before 3 leaves is gradually deepened from 3 to 4 cm to 6 to 9 Centimeter; 4 true leaves until budding flowering, cultivating depth should be gradually deepened to 12 ~ 15 cm.
Fertilizers at the seedling stage generally do not advocate seed dressing. However, fertilizers that do not use enough base fertilizer need to be topdressed. Deeply apply 9 to 10 cm between the plants at a depth of 10 cm. Before and after the application of the fixed seedlings, the combined application of foliar fertilizers for pest control is effective.
Take the original herbs, remove impurities, wash water, Run through, cut thin slices, dry. Or use when crushed, Coptis should not over 14.0% of the standard moisture, the total ash content of not more than 5.0%, dilute alcohol extract not less than 15.0%. Berberine hydrochloride is not less than 5.5% berberine, berberine not less than 0.80%, berberine not less than 1.6%, palmatine not less than 1.5%.
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