In the corn production, there is an empty stalk phenomenon. In addition to the congenital infertility type of "public corn", there is also an infertile type, that is, an effective ear on the plant, but does not draw filaments and does not form seeds. The main reason is that the soil is thin, the density is too large, the management is extensive, the lack of fertilizer and water, mechanical damage, pests and other harmful factors affect the differentiation of male and female organs, affecting the development of the ear.
According to the test, in the case of fine scientific management and attention to the prevention and control of underground pests such as cockroaches and scorpions, the optimized formula fertilization, that is, the application of the ear-differentiated fertilizer, the application of panicle fertilizer and the foliar fertilizer, can basically eliminate the acquired infertility. The empty stalk phenomenon. Make corn high quality and high yield. The main measures are as follows:
Apply a good ear to differentiate fertilizer. In the jointing stage of corn, that is, the stage of the ear, the application of pure nitrogen is about 2.5 kilograms (about 5 kilograms of urea), in order to effectively increase the number of rows of grains and the number of grains per row, so as to lay a foundation for ensuring the yield of the ear. It should also be based on the growth of corn, that is, Zhang Shijianwang, stalk rough leafy, can not apply or less phosphorus and potassium fertilizer; grow thin and stalk fine yellow leaves, should increase the application of phosphorus and potassium fertilizer, and apply potassium dihydrogen phosphate 3 to 5 Kilograms, or 15 kg of phosphate fertilizer, 5 kg of potassium fertilizer, and ditch strips are applied between rows to achieve the purpose of optimizing the formulation of nitrogen, phosphorus and potassium.
Heavy application of panicle fertilizer. 5 to 7 days before heading should be applied to the panicle fertilizer, 30 kg of corn special fertilizer, or 3 to 5 kg of pure nitrogen (such as 5 to 10 kg of urea), pure phosphorus pure potassium 4 to 6 kg of elemental fertilizer (if Potassium phosphate 20 to 25 kg + potassium chloride 4 to 5 kg), strive for spikes and large grains and strive for double ears.
Skillfully apply foliar fertilizer. After the jointing of the corn, use 0.3% zinc sulphate and potassium 5,000 times to efficiently produce the spirit, mix the water into a mixture, spray the corn 2 to 3 times, or spray 0.3% zinc sulphate first, then spray 5000 times to promote the spirit. Have a good production effect. The spraying of foliar fertilizer should avoid strong sunlight or rainy days at noon, and dissolve well, and it can be used with it.
The above measures must be effective on the basis of appropriate density and good control of pests and diseases, so we must pay attention to the prevention and control of seedlings and pests and diseases in corn.
According to the test, in the case of fine scientific management and attention to the prevention and control of underground pests such as cockroaches and scorpions, the optimized formula fertilization, that is, the application of the ear-differentiated fertilizer, the application of panicle fertilizer and the foliar fertilizer, can basically eliminate the acquired infertility. The empty stalk phenomenon. Make corn high quality and high yield. The main measures are as follows:
Apply a good ear to differentiate fertilizer. In the jointing stage of corn, that is, the stage of the ear, the application of pure nitrogen is about 2.5 kilograms (about 5 kilograms of urea), in order to effectively increase the number of rows of grains and the number of grains per row, so as to lay a foundation for ensuring the yield of the ear. It should also be based on the growth of corn, that is, Zhang Shijianwang, stalk rough leafy, can not apply or less phosphorus and potassium fertilizer; grow thin and stalk fine yellow leaves, should increase the application of phosphorus and potassium fertilizer, and apply potassium dihydrogen phosphate 3 to 5 Kilograms, or 15 kg of phosphate fertilizer, 5 kg of potassium fertilizer, and ditch strips are applied between rows to achieve the purpose of optimizing the formulation of nitrogen, phosphorus and potassium.
Heavy application of panicle fertilizer. 5 to 7 days before heading should be applied to the panicle fertilizer, 30 kg of corn special fertilizer, or 3 to 5 kg of pure nitrogen (such as 5 to 10 kg of urea), pure phosphorus pure potassium 4 to 6 kg of elemental fertilizer (if Potassium phosphate 20 to 25 kg + potassium chloride 4 to 5 kg), strive for spikes and large grains and strive for double ears.
Skillfully apply foliar fertilizer. After the jointing of the corn, use 0.3% zinc sulphate and potassium 5,000 times to efficiently produce the spirit, mix the water into a mixture, spray the corn 2 to 3 times, or spray 0.3% zinc sulphate first, then spray 5000 times to promote the spirit. Have a good production effect. The spraying of foliar fertilizer should avoid strong sunlight or rainy days at noon, and dissolve well, and it can be used with it.
The above measures must be effective on the basis of appropriate density and good control of pests and diseases, so we must pay attention to the prevention and control of seedlings and pests and diseases in corn.
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