The return of green wheat to wheat, which lasts for 50 to 60 days, is a key period for the formation of crop yield. Doing a good job in wheat spring management has a very important role in increasing wheat yield.
First, due to the management of seedlings in the north of China, the territory is vast, soil quality and climate are complex. The growth of spring wheat seedlings varies greatly. However, there are three types of seedlings that are summarized in the roots: Wang Miao, strong seedlings, and weak seedlings. In production management, they should be separated. The situation is treated differently, so that the right medicine can be prescribed because of seedling management.
1. Wang Miao: This type of wheat field is characterized by rapid growth of heart and leaves, thick leaves, large leaves and under Phi, growing prosperous, large groups, early ridge closure, between the lines closed, over the first three leaves over the winter, big Significantly higher than the spike index, early lodging. Management should be based on control, do not give back green fertilizer, do not throw back Qingshui, deep cultivator, cut roots scab, spray KMC before the jointing or spray 20 ml of paclobutrazol solution per mu 30 kg. Watering can be applied after jointing, and when the length of the second section is fixed. For wheat fields with early sowing, large amount of sowing, lots of fertilization, winter pre-prosperous, and severe freezing damage, they can apply fertilizer and water earlier, and increase the temperature of cultivating, so that they can start multiple crops for the first time, reduce the amount of steamed buns, and water the fertilizer after jointing. .
2. Strong seedlings: This type of wheat field is characterized by green-blue leaves, large leaves, and suitable groups, which are robust and robust. Over the winter, the three or more leaves of the big locust have approached or reached the spike index, and management should control spring births. To ensure that the growth of panicles, promote flower growth, in the rise or after the florets differentiation of the application of fertilizer. Such as wheat seedlings lean, but also through deep cultivating roots or repression control, promote seedlings polarization, until the emergence of "hollow" worms, and then fertilization and stability. It is not too early for the strong seedlings to water and fertilizer, and it should not be too late so as to avoid the closure of the wheat fields and the late-maturing of greed. The amount of top dressing is 5~7.5 kg urea per acre.
3. Weak seedlings: These wheat fields are characterized by pale leaves, narrow leaves, slow growth, and small populations. The management of such wheat fields should be based on promotion. Weak seedlings in different situations should be treated differently. Such as thin land, less fertilization, weak leaves under the yellow seedlings, water fertilizer should be as early as possible; the fertilizer has been caught in the fertility, good sensation, seedling age of late seeding weak seedlings, early cultivator should promote early hair, top dressing watering delayed After the rise, the seedlings with high fertility, early sowing, large sowing volume, large groups, and weak individuals should be sparsed as soon as possible, and then top-dressing cultivators.
Second, make good use of ear buds The role of fertilizer and water during this period is mainly to promote internode elongation under the ear, extend the functional period of the upper leaves, prevent the degradation of small flowers, increase the number of solid grains. Wheat booting stage is the critical period of water demand, all kinds of wheat fields should be well watered, the time should be about 15 days after jointing. However, for wheat fields with high fertility, prosperous growth, and good lye, one need not top-dressing and postponing watering; wheat fields with poor fertility, yellow seedlings, and defertilizers may be combined with water, and Mushi N Below 2 kilograms, it should be noted that the booting fat can not be too late, so as to avoid late maturity and reduce the weight.
Third, the prevention and treatment of spring diseases and weeds Spring disease is mainly rust, powdery mildew, production and insect pests are wheat spider mites, wheat bran, alfalfa, etc., to strengthen the forecast and timely prevention and treatment. The focus of prevention and control is high-yield wheat fields. In addition to the combination of early weeping and weeding, weeds in wheat fields can also be removed from the joints. We must master the amount, time, and even spraying.
Fourth, to prevent late frost damage The emergence of warm winter air, often accompanied by the late spring, the time of the end of the spring cold, generally in late March or early April, the late spring cold will have a great impact on wheat production: Therefore, we must pay great attention to do a good job Late frost defenses. According to the weather forecast, it should be watered one or two days before the frost to increase the humidity in the field, ease the low temperature amplitude, and prevent and mitigate the effects of frost damage. After the occurrence of frost damage, it is necessary to promptly remedy the differences between the frozen leaves and the young ears, and carry out top-dressing, watering, cultivating, etc. in time to promote the occurrence of latent tillering and the growth of new pods, so that the wheat field population does not As for the reduction, liquid organic fertilizer can also be sprayed on the surface to restore normal growth of the leaves as soon as possible. (Yang Surui, Agronomy Specialty Group, Qingyuan Vocational Education Center, Baoding, Hebei Province)
First, due to the management of seedlings in the north of China, the territory is vast, soil quality and climate are complex. The growth of spring wheat seedlings varies greatly. However, there are three types of seedlings that are summarized in the roots: Wang Miao, strong seedlings, and weak seedlings. In production management, they should be separated. The situation is treated differently, so that the right medicine can be prescribed because of seedling management.
1. Wang Miao: This type of wheat field is characterized by rapid growth of heart and leaves, thick leaves, large leaves and under Phi, growing prosperous, large groups, early ridge closure, between the lines closed, over the first three leaves over the winter, big Significantly higher than the spike index, early lodging. Management should be based on control, do not give back green fertilizer, do not throw back Qingshui, deep cultivator, cut roots scab, spray KMC before the jointing or spray 20 ml of paclobutrazol solution per mu 30 kg. Watering can be applied after jointing, and when the length of the second section is fixed. For wheat fields with early sowing, large amount of sowing, lots of fertilization, winter pre-prosperous, and severe freezing damage, they can apply fertilizer and water earlier, and increase the temperature of cultivating, so that they can start multiple crops for the first time, reduce the amount of steamed buns, and water the fertilizer after jointing. .
2. Strong seedlings: This type of wheat field is characterized by green-blue leaves, large leaves, and suitable groups, which are robust and robust. Over the winter, the three or more leaves of the big locust have approached or reached the spike index, and management should control spring births. To ensure that the growth of panicles, promote flower growth, in the rise or after the florets differentiation of the application of fertilizer. Such as wheat seedlings lean, but also through deep cultivating roots or repression control, promote seedlings polarization, until the emergence of "hollow" worms, and then fertilization and stability. It is not too early for the strong seedlings to water and fertilizer, and it should not be too late so as to avoid the closure of the wheat fields and the late-maturing of greed. The amount of top dressing is 5~7.5 kg urea per acre.
3. Weak seedlings: These wheat fields are characterized by pale leaves, narrow leaves, slow growth, and small populations. The management of such wheat fields should be based on promotion. Weak seedlings in different situations should be treated differently. Such as thin land, less fertilization, weak leaves under the yellow seedlings, water fertilizer should be as early as possible; the fertilizer has been caught in the fertility, good sensation, seedling age of late seeding weak seedlings, early cultivator should promote early hair, top dressing watering delayed After the rise, the seedlings with high fertility, early sowing, large sowing volume, large groups, and weak individuals should be sparsed as soon as possible, and then top-dressing cultivators.
Second, make good use of ear buds The role of fertilizer and water during this period is mainly to promote internode elongation under the ear, extend the functional period of the upper leaves, prevent the degradation of small flowers, increase the number of solid grains. Wheat booting stage is the critical period of water demand, all kinds of wheat fields should be well watered, the time should be about 15 days after jointing. However, for wheat fields with high fertility, prosperous growth, and good lye, one need not top-dressing and postponing watering; wheat fields with poor fertility, yellow seedlings, and defertilizers may be combined with water, and Mushi N Below 2 kilograms, it should be noted that the booting fat can not be too late, so as to avoid late maturity and reduce the weight.
Third, the prevention and treatment of spring diseases and weeds Spring disease is mainly rust, powdery mildew, production and insect pests are wheat spider mites, wheat bran, alfalfa, etc., to strengthen the forecast and timely prevention and treatment. The focus of prevention and control is high-yield wheat fields. In addition to the combination of early weeping and weeding, weeds in wheat fields can also be removed from the joints. We must master the amount, time, and even spraying.
Fourth, to prevent late frost damage The emergence of warm winter air, often accompanied by the late spring, the time of the end of the spring cold, generally in late March or early April, the late spring cold will have a great impact on wheat production: Therefore, we must pay great attention to do a good job Late frost defenses. According to the weather forecast, it should be watered one or two days before the frost to increase the humidity in the field, ease the low temperature amplitude, and prevent and mitigate the effects of frost damage. After the occurrence of frost damage, it is necessary to promptly remedy the differences between the frozen leaves and the young ears, and carry out top-dressing, watering, cultivating, etc. in time to promote the occurrence of latent tillering and the growth of new pods, so that the wheat field population does not As for the reduction, liquid organic fertilizer can also be sprayed on the surface to restore normal growth of the leaves as soon as possible. (Yang Surui, Agronomy Specialty Group, Qingyuan Vocational Education Center, Baoding, Hebei Province)
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