Wheat management advice this spring

In late February, the Agricultural Bureau of Wuqiao County, Hengshui City, organized agricultural technicians to investigate the situation of different types of wheat in the whole county and the public opinions, and put forward suggestions for the management of wheat this spring:

First, the condition of the seedlings from the overwintering survey, a type of seedlings accounted for 65%, 20% of the seedlings accounted for 30%, three types of seedlings accounted for about 5%. The proportion of the first and second seedlings is the highest in recent years. There are three main reasons for the analysis: 1 The seedlings are sufficient at the time of sowing, and the accumulated temperature above 0°C before sowing and the rainfall is higher (from mid-October to November. Precipitation was 33 millimeters in the second half of the year, which was 18.2 millimeters more than in the same period of the calendar year. Temperature and humidity conditions were very favorable for the growth of wheat; 2 the soil preparation quality and the sowing quality were generally improved; 3 the sowing date was early and the seeding rate was large (the sowing rate of the acres was 2.5-2.5 times higher than in previous years.) 5 kg) increase the number of mu stems. Compared with previous years, the number of tillers per plant in the first and second types of wheat fields decreased, and the leaf age, plant height, and fresh weight per plant of the main stem increased. What's more, some of the early sowing wheat fields with excessive sowing had appeared pre-winter farmers. Fortunately, the temperature in December 2011 was slowly declining and the average temperature was 1°C lower than that in the same period of the calendar year. In January, it was 0.7°C lower than usual. The average temperature in February was also 1.2°C lower than that of the calendar year, effectively restraining these prodigal wheat seedlings. Fertility process.

Second, the situation of the public opinion from the measurement results, the current public opinion is generally better than in previous years, the average public opinion is about 12%, the sandy soil wheat field in the 9.2 to 11.4, the good water retention in the heavy loam wheat field between 13.2 to 14.5 The sensation is generally better than in previous years.

Third, the management proposal is based on this year's wheat seedlings, public opinion situation, combined with the climate characteristics of this spring, should focus on doing the following work:

(1) Timely buckwheat and cultivator plan. For a type of wheat field and part of the second type of wheat, due to the large population before the winter and more dry leaves during the winter, we should use the wood to pick up the dried leaves and expose the green part for photosynthesis. The lyrical condition (thickness of dry soil less than 3 to 4 cm) can be manually delineated to cut through the epidermis and cut off the rise of capillary water to warm up and protect the body, so as to delay the first watering time in spring. Part of the late sowing wheat (mostly cotton buckwheat), sowing late, small growth before winter, the ground exposed area is large, coupled with no suppression or poor repression after sowing, loose topsoil, surface moisture evaporation, such wheat fields It is best to select the dike in the early afternoon after the return of wheat to Qinghai, and then carry out the cultivator plan to promote the transformation of wheat seedlings from weak to strong.

(2) Early prevention of pests and weeds. Chemical valerian should choose the key period, the best time to choose the time after the return of green wheat to the jointing before, after the jointing is strictly prohibited, causing damage to wheat. Due to the early sowing of most of the wheat last year, high autumn and winter temperatures, good field conditions, high humidity, and high weeding rate before winter, farmers have no pre-winter control habits. After the return of green wheat, we should conduct a survey once weed density is reached. More than 5 to 8 plants/sq.m. Weeds are immediately chemically treated. For field weeds, wheat fields dominated by broad-leaved weeds such as wheat straw can be sprayed with 10% tribenuron-methyl, and the dosage is 10 to 20 g/mu. For field weeds such as bromegrass, wild oats and other grassy weeds should be controlled by herbicides such as Puma, Sima, and Komam, but we must strictly control the dose to avoid injury; wheat field weeds We can use 10% tribenuron-methyl wettable powder 10 grams for mixed grass plots of grasses and broad-leaved weeds, and mix them with the corresponding amount of hummer or Shima, and add 30 to 40 kg of water for spraying.

In the past, due to the hazards of wheat sheath blight and full-bleeding disease, a piece of land with dry and white spikes appeared in the late stage. 12.5% ​​of wolfberry fruit or 20% triadimefine should be used for spraying prevention from the turn-on stage, along the wheat ridge in the disease area. Spray stem base is appropriate. In the past, the heavy part of red spiders should be closely monitored for their hazards. Once the density of the population reaches 200 feet per foot and two feet, avermectin plus carbendazim is used to select the afternoon spray control for clear weather. Wheat fields close to flowering fields, roadsides, and ditches should be supplemented with beta-cypermethrin and imidacloprid to prevent Laodelphax striatellus from disease prevention.

(3) Take precautions against falling. For groups with large groups and wheat fields with risk of lodging in the later period, a series of measures should be taken to prevent them from falling.

1 Strict control of fertilizer. For early sowing, large amount of the following species, and growing tendency to flourish, part of the wheat fields with better locust status, the first time the spring fertilizer was postponed to the jointing stage as far as possible, and only some of the deferring lands were fertilized.

2 pressure wheat. Pressing the wheat can temporarily suppress the main stem and the big larvae and accelerate the death of the quail. Pressure wheat should master the bifurcation of the bifurcation after the peak of delivery, and when the internodes are not pulled out of the ground, it will be carried out at the end of the period. If the wheat is too early to be pressed, it will not be polarized. Instead, it will promote the development of some small deliveries; The purpose; too late will affect the spike. Pressed wheat is usually carried out on sunny days from 11 am to 4 pm.

3 spray chemical protective agent. Before the wheat rose to the jointing stage, wheat Jinde 30~60 ml/mu spray control base length of 1-3 internodes was used to reduce the plant height and reduce the lodging probability.

(4) Scientific application of fertilizer and water. Rational application of fertilizer and water according to the conditions of field conditions, to prevent returning to the green period, blindly watering topdressing, resulting in large groups, causing late lodging. This year, most of the wheat fields (thickness of dry soil layer is only about 3 cm) can be postponed until the jointing stage of wheat. In combination with watering, 10 to 15 kg of urea can be topdressed. Only a small part of the sandy soil that has lost its weight due to poor soil preparation and poor planting quality was fertilized early in the late Qinghai period or early in the morning.

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