Cotton tubule at high yield seedling stage
The management of cotton seedling stage is very important, which is directly related to whether cotton can build a high-yield shelf and adjust the reasonable transformation from vegetative growth to reproductive growth. The principle of seedling management is to grasp the whole seedling first, cultivate strong seedlings on this basis, and promote the early development of seedlings.
The key points of seedling management are: check seedlings in time after sowing, find rotten buds and rotten seeds, and replant them in time. Inter-seedlings, fixed seedlings, inter-seedlings can be divided into two times, the first time after the seedlings, stay strong seedlings, pull out weak seedlings, diseased seedlings. The second time was carried out at 1-2 true leaves, and the seedlings were fixed at the three-leaf stage, when the base of the stem was lignified and the ability to resist adverse environment was enhanced. Middle tillage, through middle ploughing, can increase soil temperature, reduce water evaporation, promote root growth, cultivate strong seedlings and promote early emergence. Three times of intertillage were generally carried out at the seedling stage. The first time in the cotyledon stage, combined with the seedlings. Early and middle tillage can increase the ground temperature around the roots, promote the early emergence of roots and increase the absorptive capacity, make the true leaves come out early and enhance the stress resistance of seedlings. It can also break the soil consolidation and play the role of preserving soil moisture. This time the ploughing depth is 4cm to 5cm. At this time, it has entered June, the temperature is rising, the root system is stronger, and the aboveground part grows faster. Deep ploughing can disperse soil moisture, promote root rooting, and control internodes, which is more important in more fertile cotton fields. Fertilization, slow growth in the seedling stage, topdressing should be applied early, light or not according to the seedling condition. Irrigation and drainage, a mature cotton field in the northern cotton area, if the soil moisture is fully watered before sowing, it is not watered at the seedling stage, do a good job of mid-ploughing and preserving soil moisture, and those who really need watering should be watered lightly, ditched in different ditches, and after watering, ploughing and preserving soil moisture should be done to improve ventilation and raise the soil temperature. The field capacity of soil at seedling stage should be 55% and 70%. Pest control, the main cotton diseases and insect pests in this period are: cotton Verticillium wilt, cotton aphids, cotton blind stink bugs, cotton bollworm, cotton red spiders and so on.
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Experience in High-yield cultivation of Cotton
First, before sowing, you should first buy improved cotton seeds, advocate changing cotton seeds every year, and never be cheap, and use second-or third-generation cotton seeds, because the output of self-retained seeds will be reduced by about 10% every year. Use about 1.5 kilograms of seeds per mu, dry the seeds before sowing, the cumulative drying time is not less than 30 hours, and constantly turn over. Be careful not to spread it directly on the cement floor, brick floor or metal plate. Before sowing, the soil moisture must be made and preserved in time so that the soil moisture can be planted. Second, scientific fertilization and adequate base fertilizer, generally applying high-quality farm manure per mu.
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Simplified cultivation measures for High yield of Cotton
In the process of cotton cultivation, cotton farmers often consult: why is the shedding of buds and bolls serious? Why are there so many spades? In addition to "complaining about the bad weather" and "complaining too much about Rain Water", cotton farmers should also think that the excessive density of cotton fields is the "culprit". In the past, cotton farmers were "one? It is common to keep 5000-6000 seedlings per mu of Yuanyi. At present, cotton fields with a density of 3000 to 4000 plants per mu can still be found everywhere, and "excessive density" is a common problem of most cotton farmers. As a result, a single plant of cotton is produced.
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