Management of Sweet Potato Expansion
The expansion of sweet potato is a critical period for the formation of yield. In this period of field management, we must grasp the following three points:
First, spray foliar fertilizer on severe landslides should be mainly sprayed with nitrogen fertilizer, on the contrary should be a reasonable mix of nitrogen, phosphorus and potassium. The amount of fertilizer can be determined according to the weather conditions at that time. Generally, the amount of spraying can be less when there is no rain during the long period of time, and the spraying should be done in time after spraying. Each dose of 30-75 grams per acre is used to spray 15 kilograms of water.
Second, chase cracking fertilizer from the Department of summer to Bailu is sweet potato root swelling. Use 3 to 5 kilograms of urea per acre, 500 kilograms of water, and water the sweet potato roots. This will have a good effect on preventing the premature decay of sweet potato and accelerating the swelling of sweet potato roots.
III. Dry irrigation irrigation row The expansion of sweet potato often encounters autumn drought. Failure to water it in time will affect the yield. In order to ensure an increase in production, this period can be filled with water 2 to 3 times. In case of Qiuyu, it should be drained in time so as to avoid the lack of oxygen in the soil and affect the swelling of roots.
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