The cotton flowering period refers to the period from the first flower to the full bloom, and the flower to the leaf floe. It usually takes about 50 days, which is the most vigorous period of growth and development in cotton. In the early flowering stage, the cotton grows fastest, the branches and leaves grow most vigorously, and a lot of flowers bloom after the flowering. Therefore, the branches and flowers of the cotton in the flowering and boll period are also abundant, which is also the period of most fertilizer absorption. According to the study, the absorption of nitrogen, phosphorus and potassium in the flowering and boll period accounted for more than 70% of the total absorption in the whole life. Among them, the nitrogen uptake from the initial flowering to the full bloom period accounted for 56% of the total lifetime, and the phosphorus absorption was 24%. , potassium absorption 36%; from the flowering period to the boll opening period, nitrogen absorption 23%, phosphorus absorption 51%, potassium absorption 42%. Therefore, it is necessary to reapply the flower bell fertilizer to meet the flowering and ringing needs of the cotton plant. If the fertilizer is insufficient at this time, the premature aging will be removed, the bud bell will fall off, the bell will be less, and the yield will decrease.
Correctly pursued, cotton flower and bell fertilizer is the key measure to capture the "three peaches". When applying, you should look at the seedlings, see the sky, and see the ground force flexibly. Usually for early-skinned, cotton and bud-deficient and poor-potential cotton fields, such as weather drought, should be applied at the initial flowering stage, but the early flowering period of cotton plant branches and leaves grow vigorously, the application rate should not be too much; for late hair, ground fertilizer, base fertilizer In particular, cotton fields with sufficient buds and strong growth, if the weather is rainy, should hold 2-3 large bells in the lower part. At this time, due to the weakening of the growth of the branches and leaves, the cotton bolls are formed in large quantities, and the re-application of fertilizers usually does not cause longevity. Flower bell fertilizer generally accounts for about 50% of the total amount of topdressing, and 12.5-15 kg of standard nitrogen fertilizer per mu is suitable. High-yield cotton fields should also be combined with a certain amount of phosphorus and potassium fertilizer, so that the cotton plants are stable, premature and not premature. When applying, it should be ditched or deep in the hole. When the soil is dry, it should be mixed with water to increase the fertilizer.
Fuqian Peach, Fu Peach and Qiu Peach are called "three peaches" of cotton. The proportion of Fuqian peach to Santao is small, but it is very important. It can stabilize the long-term peach cotton and win the initiative. Futao is the cotton peach in the middle of the cotton plant. The bell is of good quality and is the main component of high yield. Part; autumn peach is small, fiber quality is also poor, but it also has a certain effect on the composition of production. High-yield cotton fields require three peaches to improve the total number of peaches. Therefore, on the basis of heavy application of bolls, in order to prevent premature aging of cotton plants, it is necessary to look at the seedlings to cover the top fertilizer, in order to fight for more autumn peaches.
Generally, cotton fields that have a premature aging trend due to lack of fat, or cotton fields where the middle and lower buds are severely detached should be covered with top fertilizer early, and strive to build more autumn peaches. For cotton fields with good growth, fertility and strong stamina, less should be applied. Or do not apply, so as not to be greedy and late. The topping fertilizer should not be applied too late. It should be applied before and after the beginning of autumn. The premature deficiencies cotton field should be properly advanced. At the same time, the dosage should be strictly controlled according to the growth of the cotton plant and the change of the weather after autumn. If the dosage is too much, it will cause “second timeâ€. Growing, the leaves are vigorously regenerated, which is not conducive to the full growth of the boll, so that the weight of the bell is reduced and the quality is deteriorated. Generally, the standard nitrogen fertilizer is 5-7.5 kilograms, and it is still better to apply the ditch (hole). When the soil is dry, it should be mixed with water.
Author: Fan Xiuli
Source: Gansu Science and Technology News
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Correctly pursued, cotton flower and bell fertilizer is the key measure to capture the "three peaches". When applying, you should look at the seedlings, see the sky, and see the ground force flexibly. Usually for early-skinned, cotton and bud-deficient and poor-potential cotton fields, such as weather drought, should be applied at the initial flowering stage, but the early flowering period of cotton plant branches and leaves grow vigorously, the application rate should not be too much; for late hair, ground fertilizer, base fertilizer In particular, cotton fields with sufficient buds and strong growth, if the weather is rainy, should hold 2-3 large bells in the lower part. At this time, due to the weakening of the growth of the branches and leaves, the cotton bolls are formed in large quantities, and the re-application of fertilizers usually does not cause longevity. Flower bell fertilizer generally accounts for about 50% of the total amount of topdressing, and 12.5-15 kg of standard nitrogen fertilizer per mu is suitable. High-yield cotton fields should also be combined with a certain amount of phosphorus and potassium fertilizer, so that the cotton plants are stable, premature and not premature. When applying, it should be ditched or deep in the hole. When the soil is dry, it should be mixed with water to increase the fertilizer.
Fuqian Peach, Fu Peach and Qiu Peach are called "three peaches" of cotton. The proportion of Fuqian peach to Santao is small, but it is very important. It can stabilize the long-term peach cotton and win the initiative. Futao is the cotton peach in the middle of the cotton plant. The bell is of good quality and is the main component of high yield. Part; autumn peach is small, fiber quality is also poor, but it also has a certain effect on the composition of production. High-yield cotton fields require three peaches to improve the total number of peaches. Therefore, on the basis of heavy application of bolls, in order to prevent premature aging of cotton plants, it is necessary to look at the seedlings to cover the top fertilizer, in order to fight for more autumn peaches.
Generally, cotton fields that have a premature aging trend due to lack of fat, or cotton fields where the middle and lower buds are severely detached should be covered with top fertilizer early, and strive to build more autumn peaches. For cotton fields with good growth, fertility and strong stamina, less should be applied. Or do not apply, so as not to be greedy and late. The topping fertilizer should not be applied too late. It should be applied before and after the beginning of autumn. The premature deficiencies cotton field should be properly advanced. At the same time, the dosage should be strictly controlled according to the growth of the cotton plant and the change of the weather after autumn. If the dosage is too much, it will cause “second timeâ€. Growing, the leaves are vigorously regenerated, which is not conducive to the full growth of the boll, so that the weight of the bell is reduced and the quality is deteriorated. Generally, the standard nitrogen fertilizer is 5-7.5 kilograms, and it is still better to apply the ditch (hole). When the soil is dry, it should be mixed with water.
Author: Fan Xiuli
Source: Gansu Science and Technology News
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