First, the effect of cotton boron application
1. Baohua Bell
Experiments show that reasonable application of boron fertilizer, cotton flower development and normal fertilization are normal, ovary development is good, is conducive to the formation and growth of bolls, thereby reducing the rate of cotton buds out of the bell, increase production. If there is a lack of boron in the cotton, the flower development is not normal, there will be buds without flowers, flowers without bells, bells and other adverse consequences.
2. Improve quality
Boron promotes the growth of roots, improves the physiological function of roots, promotes early growth of strong seedlings, accelerates the leaf speed of true leaves, promotes the movement of carbohydrates in cotton plants, and coordinates the balance of growth and development of cotton plants, which is beneficial to the stability of cotton plants. Long, premature, not premature aging. Experiments have shown that boron plays an important role in accelerating cotton development, promoting precocity and improving quality. The application of boron to cotton has increased the number of flowers before buds, which can effectively increase the number of single plants, boll weight and lint, improve cotton quality, increase fiber length and lint.
3. Improve stress resistance
The amount of boron content directly affects the resistance and disease resistance of cotton, boron can promote the formation of vitamin C, increase the resistance of cotton.
4. Improve the rate of healthy seeds
Boron can promote the growth and development of cotton flower, so that the flower development is good, increased pollination, improved cotton seed growth and development environment, improve cotton seed rate.
5. Regulation
Boron promotes the synthesis of amino acids and proteins, which can regulate the balance of cotton and absorb other nutrients.
Second, cotton deficiency symptoms
Cotton is a dicotyledonous plant and requires a greater amount of boron than monocotyledonous plants. Normally, the amount of boron per kilogram of plants is 20-35 milligrams. In the absence of boron in cotton, the growth of roots was blocked, the lower leaves became larger, the new leaves at the top became smaller, and the petioles had infiltrated bands. The rate of petiole in the main stem is greater than 3%, the growth point of the main stem is damaged, the axillary buds are clustered, the bud bells are detached, the buds are not flowered, the corolla is shortened, and it is difficult to stretch and it is difficult to reach peach. In addition to the judgment based on symptoms, it is also possible to predict whether the cotton field is deficient in boron based on the available boron content in the soil. The available boron content in soil is less than 0.2 mg/kg. Cotton is seriously deficient in boron, and boron can be greatly increased; soil available boron content is 0.2-0.5 mg/kg; cotton is moderately deficient in boron; boron fertilizer has a significant effect on yield increase; soil is effective The boron content is 0.5-0.8 mg/kg. The cotton is lightly deficient in boron and the application of boron fertilizer has a certain effect of increasing production.
Third, cotton boron application technology
1. Fertilizer
0.2-0.4 kg of BoronTM per 667 square meters is mixed with sieved soil compost or dry fine soil and applied in sowing or transplanting ditch and hole. Shihyun, avoid contact with the seed, not seed dressing, do not cover seed, do not apply directly under the seed, so as not to interfere with seed germination and seedling growth.
2. Base fertilizer
Mix before planting or before transplanting or transplanting. 200 to 400 grams of BoronTM is applied per 667 square meters, and it is applied together with fertilizers such as nitrogen, phosphorus, and potassium, or sieved earth fertilizer or dry fine soil. At the same time, cotton has a large demand for potassium. When organic fertilizer is insufficient, potassium fertilizer or potassium-containing fertilizer should be added. During the growth period, potassium can be sprayed on the foliage.
3. Dressing
During the flowering stage of cotton buds, topdressing was performed, bud fertilizer was applied stably, and flower bell fertilizer was reused. The boron fertilizer can be applied, depending on the amount of boron fertilizer and the amount of boron fertilizer, depending on the amount of boron fertilizer and boron fertilizer applied per 667 square meters, it can be 200 grams of strong Boron or 200 ml of Boron, 30 grams of polymerized Boron, 10 to 15 kg of fine soil, or Dissolved in 50 kg of water, 6-9 cm away from the cotton seedlings ditch (point) under the Shi, then covered with soil.
4. Foliar fertilizer
Foliar spraying of nutritive elements has the advantages of economy, efficiency and safety. The application of boron fertilizer during the growth period is most suitable for foliar spraying. The first is that boron is not easily transferred from the old tissue to the new tissue in the body of the plant. The application of boron fertilizer can meet the needs of the new tissue in a timely manner. Second, the mixed labor of the drug and the fertilizer can save labor. The polymerization of boron is neutral and the compatibility is relatively low. Well, adding potassium fertilizer during spraying can better exert the effect of increasing boron production. In the case of severe boron deficiency, fertilizer should be sprayed once every 10 days from the bud of cotton. In the bud stage, early flowering stage and flowering and boll stage, one spray of polymerized boron is better. The spray rate is 30-45 grams per 667 square meters for the bud period, 45-60 grams for the early flowering period, and 60 grams for the flowering period. Generally, the cultivation and management measures of “pre-early fertilization, boron fertilization as the basic application, control of budding bell fertilizer, reapplying of boll-bell fertilizer, spraying of boron and potassium fertilizers, filling of boiled water, and seeing appropriate supplementation of fertilization in later stage†were adopted.
1. Baohua Bell
Experiments show that reasonable application of boron fertilizer, cotton flower development and normal fertilization are normal, ovary development is good, is conducive to the formation and growth of bolls, thereby reducing the rate of cotton buds out of the bell, increase production. If there is a lack of boron in the cotton, the flower development is not normal, there will be buds without flowers, flowers without bells, bells and other adverse consequences.
2. Improve quality
Boron promotes the growth of roots, improves the physiological function of roots, promotes early growth of strong seedlings, accelerates the leaf speed of true leaves, promotes the movement of carbohydrates in cotton plants, and coordinates the balance of growth and development of cotton plants, which is beneficial to the stability of cotton plants. Long, premature, not premature aging. Experiments have shown that boron plays an important role in accelerating cotton development, promoting precocity and improving quality. The application of boron to cotton has increased the number of flowers before buds, which can effectively increase the number of single plants, boll weight and lint, improve cotton quality, increase fiber length and lint.
3. Improve stress resistance
The amount of boron content directly affects the resistance and disease resistance of cotton, boron can promote the formation of vitamin C, increase the resistance of cotton.
4. Improve the rate of healthy seeds
Boron can promote the growth and development of cotton flower, so that the flower development is good, increased pollination, improved cotton seed growth and development environment, improve cotton seed rate.
5. Regulation
Boron promotes the synthesis of amino acids and proteins, which can regulate the balance of cotton and absorb other nutrients.
Second, cotton deficiency symptoms
Cotton is a dicotyledonous plant and requires a greater amount of boron than monocotyledonous plants. Normally, the amount of boron per kilogram of plants is 20-35 milligrams. In the absence of boron in cotton, the growth of roots was blocked, the lower leaves became larger, the new leaves at the top became smaller, and the petioles had infiltrated bands. The rate of petiole in the main stem is greater than 3%, the growth point of the main stem is damaged, the axillary buds are clustered, the bud bells are detached, the buds are not flowered, the corolla is shortened, and it is difficult to stretch and it is difficult to reach peach. In addition to the judgment based on symptoms, it is also possible to predict whether the cotton field is deficient in boron based on the available boron content in the soil. The available boron content in soil is less than 0.2 mg/kg. Cotton is seriously deficient in boron, and boron can be greatly increased; soil available boron content is 0.2-0.5 mg/kg; cotton is moderately deficient in boron; boron fertilizer has a significant effect on yield increase; soil is effective The boron content is 0.5-0.8 mg/kg. The cotton is lightly deficient in boron and the application of boron fertilizer has a certain effect of increasing production.
Third, cotton boron application technology
1. Fertilizer
0.2-0.4 kg of BoronTM per 667 square meters is mixed with sieved soil compost or dry fine soil and applied in sowing or transplanting ditch and hole. Shihyun, avoid contact with the seed, not seed dressing, do not cover seed, do not apply directly under the seed, so as not to interfere with seed germination and seedling growth.
2. Base fertilizer
Mix before planting or before transplanting or transplanting. 200 to 400 grams of BoronTM is applied per 667 square meters, and it is applied together with fertilizers such as nitrogen, phosphorus, and potassium, or sieved earth fertilizer or dry fine soil. At the same time, cotton has a large demand for potassium. When organic fertilizer is insufficient, potassium fertilizer or potassium-containing fertilizer should be added. During the growth period, potassium can be sprayed on the foliage.
3. Dressing
During the flowering stage of cotton buds, topdressing was performed, bud fertilizer was applied stably, and flower bell fertilizer was reused. The boron fertilizer can be applied, depending on the amount of boron fertilizer and the amount of boron fertilizer, depending on the amount of boron fertilizer and boron fertilizer applied per 667 square meters, it can be 200 grams of strong Boron or 200 ml of Boron, 30 grams of polymerized Boron, 10 to 15 kg of fine soil, or Dissolved in 50 kg of water, 6-9 cm away from the cotton seedlings ditch (point) under the Shi, then covered with soil.
4. Foliar fertilizer
Foliar spraying of nutritive elements has the advantages of economy, efficiency and safety. The application of boron fertilizer during the growth period is most suitable for foliar spraying. The first is that boron is not easily transferred from the old tissue to the new tissue in the body of the plant. The application of boron fertilizer can meet the needs of the new tissue in a timely manner. Second, the mixed labor of the drug and the fertilizer can save labor. The polymerization of boron is neutral and the compatibility is relatively low. Well, adding potassium fertilizer during spraying can better exert the effect of increasing boron production. In the case of severe boron deficiency, fertilizer should be sprayed once every 10 days from the bud of cotton. In the bud stage, early flowering stage and flowering and boll stage, one spray of polymerized boron is better. The spray rate is 30-45 grams per 667 square meters for the bud period, 45-60 grams for the early flowering period, and 60 grams for the flowering period. Generally, the cultivation and management measures of “pre-early fertilization, boron fertilization as the basic application, control of budding bell fertilizer, reapplying of boll-bell fertilizer, spraying of boron and potassium fertilizers, filling of boiled water, and seeing appropriate supplementation of fertilization in later stage†were adopted.
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