At present, the wheat along the Huaihe River in Anhui is in the period of turning green. Compared with the perennial, especially last year, the overall situation of the seedlings is weak this year, mainly due to the delay of the sowing date, the autumn drought and the low temperature, as well as the large sowing and deep sowing. After several intermittent temperature rises since late January, and farmers’ timely recovery of green manure, there has been a certain degree of transformation and upgrading of the seedlings. Spring tube favorable factors: First, Wang Miao greatly reduced. The second type has a large proportion of seedlings; the second is that since autumn and winter, there is sufficient rainfall, soil moisture is suitable, there are fewer tillers, and the number of stems is more than enough. Third, no serious freezing damage occurs in winter, and continuous low temperature suppresses the occurrence of pests and diseases; Fourth, the temperature rises quickly Accelerated growth of wheat, seedlings were significantly improved; Fifth, the field management measures in place, the end of January early February early on the second and third seedlings and late weak seedlings generally followed the return of green manure. Unfavorable factors: due to early cooling and persistent rain, the area before weeding is small and the grass is relatively serious; some of the three trenches in the field have low quality, and the risk of flooding is relatively high; early sowing and large seeding are larger. There is a risk of prosperous growth, defertilization and premature senescence. Sheath blight occurs early and has a severe illness. Late weak seedlings planted after the end of October last year are now only 3-5 leaves, 1 to 2.5 stems, promoting weak It is more difficult to get stronger. Spring tube comments: 1. Classified guidance, top-dressing green manure. For the second and third types of seedlings with insufficient population and fewer tillers, fast-acting fertilizers such as urea are applied early; late weak seedlings sown late and without tillering, in addition to topdressing urea, foliar fertilizers should be sprayed to promote wheat absorption. Wang Miao and a seedling are not fertilized. 2. For the grass, symptomatic. According to the species of weeds in the wheat field, weeds, broad-leaved weeds or mixed weeds were selected and herbicides were selected. We chose to spray on warm and windless weather. 3. Dredge “three ditch†to reduce moisture and prevent stains. Dehumidification and anti-smearing should be used as the primary work for wheat field management in the spring wheat field, strengthen guidance, clean up in time, ensure the smooth flow of “three channelsâ€, eliminate water accumulation in the field as soon as possible, and protect the root from premature decay. 4. Timely control of sheath blight. When the rate of diseased plants of the sheath blight is more than 20%, the mu will be sprayed with 24% thiadiamide (full spike) 20ml or 12.5% ​​Jinggang bacillus (vinum mildew) water 200ml plus water 40kg, seriously ill The area is sprayed again about 10 days after the first spray. 5. Prevent late spring. From March to early April, late spring and cold weather occur frequently, often resulting in reduced production. Immediately applying topdressing nitrogen fertilizer or spraying foliar fertilizer to promote the recovery of wheat seedlings can effectively reduce the damage.
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