Potatoes need to be prepared for early broadcast
The preparation of potatoes should be done well before sowing, so that the potato can emerge better, cultivate robust plants and obtain high yields. Mainly should prepare the following aspects:
First, soil preparation planting soil basal fertilizer is best to deep plowing before the winter, before the spring planting pine flat leveling. Or, after the land is thawed, deep plowing is performed immediately. Basal fertilizers are required to be fully decomposed and the grazing horse dung is the best, which has the effect of improving species and reducing scab. The amount of mu is 1,000 kg, plus 100 to 150 kg of high-potassium compound fertilizer.
Second, warm seeding, drying seedlings for early emergence and Miao Qi, seedlings uniform, Miao Zhuang, the seed potato that has not passed the dormant period must be warm seed, sun seed treatment. In the first step, 30 to 40 days before sowing, warm seed germination is required, darkness is required, and the temperature is maintained at 20°C for 10 to 15 days until the top has about 1 cm of bud. The second step is to plant strong shoots. See shoots to prevent sprouting of yellow shoots and shoots when they are planted. Put the seed potatoes after the warm shoots in the astigmatism or in the sun and keep them at a low temperature of about 15°C to allow the shoots to be green. Stout, this period takes about 20 days. Note: Warm seeding and drying time should not be too long, otherwise it will cause bud senescence, which will cause premature plant failure in the future and be susceptible to early blight.
3. Dicing treatment Select cool, fine weather early morning or late evening when cutting, the cuts should be triangles (or square piers), each weighing 30 to 50 grams, leaving only one strong bud per bud, excess buds Knock off with a knife. The seed potato that has been sunburned can be used to cut large chunks, seed potatoes that are not warmed in the sun, and small and medium-sized potatoes adopt the vertical cutting method to utilize the apical dominance. The large potatoes are cut by the buds, the cutting knife must be sharp, and the buds must be cut in order to facilitate Root sprouting, before and after cutting the first knife should check whether the diseased potato is sick, cut the diseased seed potato, immediately disinfect the knife with alcohol, cut about 40 pieces per kilogram of potato. Seed potatoes should be soaked while cutting and drying. Don't wait until the cuts are piled up before processing.
Fourth, seed germ disinfection Each 50 kg buds with 70% thiophanate-methyl WP 27 grams, 30 grams of Miaosheng powder and talcum powder 650 grams, fully mixed evenly after dressing. In order to avoid touching the seed buds, the buds can also be cut and mixed with the powder.
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