Many years of cotton fertilization experience and lessons tell us that cotton has a common experience of fertilization to increase production: full base fertilizer, immediate application of Miao Fei, stable Shi Lei fertilizer, re-application of flower bell fertilizer, Pu Shi Tao Fei. However, there are differences in the application of fertilizers to different cotton varieties.
The cotton varieties include the conventional varieties and the hybrid varieties. Among the two varieties, there are early-maturing varieties, medium-maturing varieties and late-maturing varieties.
In general, conventional cotton varieties and conventional cotton hybrids require less potash fertilizer, and transgenic insect-resistant cottons, especially transgenic hybrid insect-resistant cottons, are more sensitive to potash fertilizers, according to the practice of field production in recent years. It is proved that their demand for potash is often more than double that of non-resistant cotton, and 60% of potash with an effective content of 60% per acre needs to be applied.
The growth period of early maturing cultivars is relatively shorter. The cultivars of such early cultivars are generally fast and concentrated. The demand for fertilizers is large in the early stage. If the early fertilizer is insufficient, premature senescence is likely to occur, and the lower leaves are quickly dehydrated. In the form of scorch, the upper fruit branch does not open, and the top of the growing point lacks stamina. This kind of early-maturing variety cannot be applied in time if the bell and bell fertilizer or the peach fertilizer is used, which may easily lead to the reduction of yield and income of cotton. Such cotton varieties must be fully applied at the end of the early stage fertilizer. In the middle and later stages, it is necessary to fully apply the flower and bell fertilizer. In particular, it is necessary to generally apply good peach fertilizer. When the cotton plants have more than 3 peaches, the topdressing urea should be applied per mu. Not less than 30 pounds, the previous cotton field under-applied potassium fertilizer, but also make up potash fertilizer.
Late maturity of cotton varieties, the early vegetative growth is generally relatively strong, for such varieties, one to control the total fertilizer per acre, and second, to control the excessive application of nitrogen fertilizer, if too much nitrogen fertilizer or fertilizer is too large, cotton into budding period Or during the flowering and boll period, vegetative growth often inhibits reproductive growth, delaying the maturity of late-maturing cotton varieties, and delaying the closure of cotton, causing serious shades and exacerbating the shedding of bells and rotten peaches. When these cotton varieties are fertilized, the early stage fertilization must be stable. One must strictly control the amount of nitrogen fertilizer, and the second is to control the total amount of fertilized fertilizer per acre. For example, when the base fertilizer is applied, 45% of the compound fertilizer contains three elements per mus of NPK. Should not exceed 80 pounds. Third, we must promote the use of compound fertilizers or various types of bio-organic compound fertilizers. It is best to use these two kinds of fertilizers in conjunction with the use of fertilizers. Fourth, we must do a good job of chemical regulation and shape the type of high-yield plant, and five must cooperate with thorough pruning. The right to enhance the ventilation and light transmission performance between cotton rows. Of course, due to the fact that these varieties are more resilient, more peaches can not be ignored topdressing peach fertilizer, fertilizer application of urea 20-30 pounds per acre of peach fertilizer, then supplemented with extra-root fertilizer.
The fertilization of medium-mature cotton varieties is between early-maturing and late-maturing cotton varieties, and the local climate, soil, and seedlings can be flexibly controlled.
The cotton varieties include the conventional varieties and the hybrid varieties. Among the two varieties, there are early-maturing varieties, medium-maturing varieties and late-maturing varieties.
In general, conventional cotton varieties and conventional cotton hybrids require less potash fertilizer, and transgenic insect-resistant cottons, especially transgenic hybrid insect-resistant cottons, are more sensitive to potash fertilizers, according to the practice of field production in recent years. It is proved that their demand for potash is often more than double that of non-resistant cotton, and 60% of potash with an effective content of 60% per acre needs to be applied.
The growth period of early maturing cultivars is relatively shorter. The cultivars of such early cultivars are generally fast and concentrated. The demand for fertilizers is large in the early stage. If the early fertilizer is insufficient, premature senescence is likely to occur, and the lower leaves are quickly dehydrated. In the form of scorch, the upper fruit branch does not open, and the top of the growing point lacks stamina. This kind of early-maturing variety cannot be applied in time if the bell and bell fertilizer or the peach fertilizer is used, which may easily lead to the reduction of yield and income of cotton. Such cotton varieties must be fully applied at the end of the early stage fertilizer. In the middle and later stages, it is necessary to fully apply the flower and bell fertilizer. In particular, it is necessary to generally apply good peach fertilizer. When the cotton plants have more than 3 peaches, the topdressing urea should be applied per mu. Not less than 30 pounds, the previous cotton field under-applied potassium fertilizer, but also make up potash fertilizer.
Late maturity of cotton varieties, the early vegetative growth is generally relatively strong, for such varieties, one to control the total fertilizer per acre, and second, to control the excessive application of nitrogen fertilizer, if too much nitrogen fertilizer or fertilizer is too large, cotton into budding period Or during the flowering and boll period, vegetative growth often inhibits reproductive growth, delaying the maturity of late-maturing cotton varieties, and delaying the closure of cotton, causing serious shades and exacerbating the shedding of bells and rotten peaches. When these cotton varieties are fertilized, the early stage fertilization must be stable. One must strictly control the amount of nitrogen fertilizer, and the second is to control the total amount of fertilized fertilizer per acre. For example, when the base fertilizer is applied, 45% of the compound fertilizer contains three elements per mus of NPK. Should not exceed 80 pounds. Third, we must promote the use of compound fertilizers or various types of bio-organic compound fertilizers. It is best to use these two kinds of fertilizers in conjunction with the use of fertilizers. Fourth, we must do a good job of chemical regulation and shape the type of high-yield plant, and five must cooperate with thorough pruning. The right to enhance the ventilation and light transmission performance between cotton rows. Of course, due to the fact that these varieties are more resilient, more peaches can not be ignored topdressing peach fertilizer, fertilizer application of urea 20-30 pounds per acre of peach fertilizer, then supplemented with extra-root fertilizer.
The fertilization of medium-mature cotton varieties is between early-maturing and late-maturing cotton varieties, and the local climate, soil, and seedlings can be flexibly controlled.
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