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How to carry out chemical weeding in sugar beet fields
The specific method is as follows: 74% of the broad-leaved weeds of annual grasses and small seeds can be used for 74% of Leli (cyclophyte) 4.5~6.5 liters/ha, and the soil is treated before sowing; the wild oats can be treated with oats before sowing; After controlling broadleaf weed seedlings, weeding with 16% beetin 6~9 liters/ha and 16% sweet inging 6~9 liters/ha; weeding 12.5% ​​of the annual grass weeds can be used for 1.25~ 1.5 liters / hectare, 12% of the revenue of 0.45 ~ 0.53 liters / hectare, 15% of the fine to kill 0.75 ~ 1 liter / hectare, 10.8% of efficient grass can be 0.45 ~ 0.53 liter / hectare, 6.9% of the The tyrant is 0.75~1 liters/ha, and 5% of the fine gram grass is 0.75~1 liters/ha. In the north, seedlings are generally planted from the beginning of May to the beginning of June. Because the seedlings are small, the nutrients absorbed are relatively small, accounting for about 15% to 20% of the total absorption in the whole vegetative growth stage. Beets are very sensitive to nutrients during this period, especially for phosphate fertilizer. Therefore, applying a certain amount of phosphorus and nitrogen fertilizer during sowing is very beneficial to root development and seedling growth. However, the amount of fertilizer used in sowing should not be too much, generally 1/4 to 1/3 of the amount of fertilizer applied during the whole growth period. Moreover, the specific type and amount of beet seed fertilizer must be determined according to the soil nutrient content, and what kind of fertilizer is applied to the lack of any element. In medium-fertile plots, the application rate of fertilizer for general phosphate fertilizer is 2 to 4 kg per mu, and the nitrogen fertilizer should be less than 5 kg per mu. When applying chemical fertilizers, be sure to apply 4~5 cm below the side of the bulb, and do not directly contact the bulbs to avoid "burning" and ammonia poisoning.
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