Successful study on Water floating Seedling technique of Cotton
Cotton floating seedling technology, which has always been regarded as a "forbidden area", has been successfully broken through. The key problems of the 10th five-year Plan and the major project of the National "863"-- Cotton floating Seedling Technology, which was developed and developed by Hunan Agricultural University, passed the appraisal of the expert group a few days ago.
Cotton has been a dry soil crop since it has been cultivated, and it is vulnerable to waterlogging, so the original cotton seedlings also regard floating seedlings as a forbidden area. Since 2000, the research team led by Professor Chen Jinxiang of Hunan Agricultural University has begun to "break the ban", which has been successful after nearly five years of difficult research. They not only developed this technology of floating cotton seedlings, which is still blank in the world, but also made a breakthrough in the research and application of physicochemical products such as nutrient solution and culture medium. Experts believe that this method has significant seed-saving, labor-saving, yield-increasing, and synergistic effects, saving more than 40% of seed consumption compared with conventional nutrition bowl seedling transplanting, and reducing the use of about 10 per mu of seedling and transplanting, that is to say, more than 40 seedlings can be produced per 100 seeds, and now farmers can plant four or five mu of land per load of seedlings, and the transplanting area is dozens of times that of cotton seedlings originally raised by nutrition bowls.
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Symptomatic prevention and treatment of dead cotton trees
In recent years, in some old cotton areas, the problem of "dead trees" of cotton has become more and more serious, causing many cotton farmers to suffer losses. Although prevention and control has also been carried out, it is still as serious as a year, and the effect is not ideal. Therefore, it is necessary to "give priority to disease prevention and treatment as a supplement" to prevent and control cotton diseases and reduce the incidence of cotton. 1 Control of oomycetes diseases with the popularization of disease-resistant and insect-resistant cotton species in recent years, the diseases of "dead plants" of cotton have changed, of which the most important diseases are oomycetes, 60% to 70% are caused by Phytophthora or Pythium, etc.
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Water floating Seedling raising technique of Cotton
1. Seedbed preparation: each seedbed (per mu) needs to be excavated by 1. 1-1. 2 meters, 20 centimeters deep, 2 long. 2 meters of field, flat bottom tamped for four weeks. 2. Film laying: choose 0. 06-0. The 1mm thick film is laid on the excavated seedbed, close to the sides of the seedbed, and check for water leakage and air bubbles. 3. The substrate plate: the matrix is sprayed into a ball by hand, and there is no running water between the fingers. If it falls to the ground and spreads naturally, it can be loaded into the seedling tray, so that the matrix shakes to 1-1 away from the disk. Five centimeters. 4. Match
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