First, choose good varieties. There are many varieties of Chinese cabbage, which can be divided into three basic ecological types: straight-barreled, raw-headed, and oval-shaped. However, because of the growing season, mid-late-maturing varieties that are disease-resistant, cold-resistant, high-yield, and shelf-resistant must be used for selection. The main fine varieties are: Lubai 3, Shandong No. 2, Shandong No. 5, Fengkang 85 and so on. Second, sowing time. Under normal circumstances, it is appropriate to sow 3–5 days before and after the start of autumn, and the high temperature years can be postponed until mid-August. Disease-resistant, long-lasting late-maturing varieties can be properly sown early, and medium-maturing varieties with short growing periods can be properly sown several days later. Third, preparations before sowing. Chinese cabbage cannot be used continuously, and it cannot be rotated with other cruciferous vegetables. This is one of the important measures to prevent pests and diseases. 5 to 10 cm deep ditch, first water along the ditch, water penetration, the seeds evenly sprinkled in the ditch, and cover 0.8-1 cm thick fine soil, about 0.5 kg per acre seed amount, live cabbage After the shoots are unearthed, groundwater is used to keep the floor wet and reduce the surface temperature. In the absence of rain, watering is usually done on the day of sowing or the next day, so that the ridge surface is soaked. The second day of sowing is used to pour the second water and most of the sprouts are unearthed. Seedling management. Refers to the management of the period from the unearthing of young shoots to the regimental period. This time should be time and seedlings, and in the 2-3 or 4-5 true leaves, the seedlings once, and remove weeds, diseased seedlings and weak seedlings. 6 seedlings (plants) when the fixed seedlings, and timely cultivator, so as not to hurt the root injury leaves. The cultivator should not be shallow. The live broadcast is usually planted on 5-6 leaves. Transplant colonization. Seedling age is generally 15-20 days, when the seedlings have 5-6 true leaves, the best period for transplanting. Transplanting is best done in the afternoon. According to the characteristics of the species to determine the appropriate density. Water immediately after planting. After each morning and evening, water once every day for 3-4 days in order to keep the seedlings alive. Fourth, fertilizer and water management 1, top dressing. The Chinese cabbage has a high yield and needs a large amount of fertilizer. On the basis of applying base fertilizer, do not apply fertilizer in time. Top dressing depends on different growth periods and seedlings. Seedlings are generally not top-dressing. If the base fertilizer is insufficient, the first time can be in the 3-4 true leaves period, applying 10 kg of ammonium sulfate per acre, spread on both sides of the seedlings, and immediately watering, called "lifting seedlings"; the second time in the Dingmiao or After transplanting seedlings, 15-20 kg of ammonium sulfate per acre is applied to the ditch on both sides of the ridge, which is called “fabricated fatâ€; the third time in the rosette period, 25-30 kg of ammonium sulfate per acre is applied. Calcium 10-15 kg, the fertilizer applied to the ditch or inside the hole, and then a little earth ridge, then watering, called "big top dressing"; the fourth time in the middle of the ball, ammonium sulfate 15-20 kg per mu, It can be used with water, called "heart filling". 2, watering. During the period from Chinese cabbage to rosette, the temperature of the cabbage is gradually reduced and the weather is mild. Here, it can be properly watered. The lotus can be properly controlled for a few days at the end of the rosette and watered after the third topdressing. After entering the ball stage, Chinese cabbage needs the most water. Therefore, once the seedlings are finished, they must be poured once. Then every two to three days followed by pouring the second water. This time it is very important. At this time, if the soil is cracked, the lateral roots will break and the fine roots will die, affecting the knot. Afterwards, water is usually poured 5-6 days to keep the soil moist. Fifth, binding and harvesting. In the late growth period of Chinese cabbage, the weather is changeable, and the temperature is gradually decreasing. To prevent frost, it must be bundled in time. Usually 10-15 days before harvest, stop watering, lift the rosette leaves, hold the leaf ball, and then bind the leaves with soaked sweetpotato or rice straw. Make the pack tighter and continue to grow. Before 2-3 days of light snow, it should be harvested in time and aired in the field until the outside leaves are wilting and can be stored. China Agricultural Network Editor
Bleach Clean-up Enzyme is developed to remove residual hydrogen peroxide.Usually the cotton fabric bleached with hydrogen peroxide, the bleaching chemicals must be removed before dyeing in order to avoid the reaction between the bleaching agent and the dye. The traditional way to remove bleach is to rinse the fabric several times with water. Alternatively, you can use a mild reducing agent to clean the bleach. In addition, a large amount of water is needed in rinsing which wash out a large amount of wastewater.
Conzyme CAT200 is an extremely high concentrated liquid catalase preparation. It is specially developed to remove residual hydrogen peroxide and improve the last preparation prior to dyeing; it can largely reduce hazardous chemicals usage and save water.
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