Sprout grain number promote grain number attack grain weight and do a good job in spring wheat field management
The farmer said that the equinox wheat rose and it was worth a thousand dollars. After the vernal equinox has passed, the wheat in the southwest region is in the filling stage. The middle and lower reaches of the Yangtze River will be heading for flowering. Huanghuaihai and the northwest region will continue jointing from south to north. Winter wheat has entered a critical period of yield formation. In this year, the sowing date of winter wheat in some regions was late, the population was less, and the individuals were weaker. In addition, the frequency of frost damage was frequent in winter and spring, and the panicle differentiation process was delayed. The seedling condition was a poor year in the past five years. Recently, the National Agricultural Technology Extension Service Center and the wheat expert steering group of the Ministry of Agriculture proposed to focus on “protecting panicles, promoting grain number, and attacking grain weight†to strengthen fertilizer and water operations, prevent pests and weeds, and prevent disasters. Effectively manage the field management in the spring and build a good harvest for the harvest of wheat.
One, basing on early early tube number
The number of panicles per unit area is the basis for high yield. In order to ensure sufficient panicles, we must base ourselves on early management and focus on the following measures: First, promote weak and strong. For wheat fields with late sowing, poor soil moisture content, less wheat tiller, and less secondary roots, early fertilization and watering during the start-up stage promoted the growth of secondary roots and spring tillers, and increased tillering percentage of tillers. The second is to maintain strong growth. For suitable wheat fields planted in the appropriate period and before winter, the fertilization and watering should be delayed after returning green, and the delivery of spring should be restrained to prevent the group from being oversized and lead to lodging later. The third is planning security. The fertilizer and water management should be coordinated with the cultivator, remove the compaction, eradicate weeds, warm the soil, and promote root growth. The fourth is antifreeze remediation. Pay close attention to the changes in the weather, timely watering before the onset of the cold wave, adjust the microclimate in the near ground, and prevent night frost damage. In the event of freezing injury, the combined use of water-based quick-acting fertilizers promotes the growth of the frozen seedlings as soon as possible. Southern rice and wheat fields should take the time to clear up the three channels and clear the trenches outside the fields to ensure smooth drainage and prevent waterlogging.
Second, do a good job of fertilizer and water management to promote the number of grains
The way to increase the number of grains per panicle is to improve the floret seed setting rate on the basis of promoting the development of floret, and the key point is to regulate the nutritional status of the plants through jointing from the jointing stage to the flowering stage, and to construct a suitable group structure to ensure sufficient light in the field group. . One is to apply the joint fertilizer. For the three types of wheat fields, late-seeding weak seedlings and frozen wheat crops, it is necessary to apply topdressing nitrogen fertilizer again at the jointing stage on the basis of pre-fertilization, and it is advisable to apply half of the total amount of nitrogen fertilizer in spring and apply appropriate amount of phosphate fertilizer; Insufficient, small groups, yellow defertilized wheat fields, timely replanting a small amount of booting flowering fertilizer; for a type of wheat and Wang Miao wheat, the implementation of nitrogen fertilizer after the shift, in the jointing in the late post-fertilizer to avoid the crowd closed. The second is drought protection seedlings. The jointing period is the critical period of wheat water demand, and it is also the spring drought prone period. It is necessary to do a good job of drought-resistance watering to ensure the ear differentiation water demand.
Third, do a good job of pest prevention and control attack grain weight
The flowering to maturity stage of wheat is the period for determining grain weight. Preventing premature aging is an important way to increase grain weight. One is to prevent pests and diseases. We must focus on the prevention and control of wheat sheath blight, stripe rust, head blight, powdery mildew, wheat aphid, and midge pests. We should do a good job of forecasting, selecting appropriate counteragents, implementing unified control, and comprehensive prevention and control of pests and diseases. The second is to implement "one spray and three defenses." Prepare insecticides, fungicides, plant growth regulators, and potassium dihydrogen phosphate as early as possible, focusing on the raising of flowers from the heading and raising of flowers in wheat to the spraying of fertilizer mixture during the milking period of the grouting milk. Pay close attention to high-temperature weather, and spray it several times in a timely manner. Dry hot air, prevent premature aging, extend the grain filling period, and increase grain weight.
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