Sweet potato swell

After applying the cracked fertilizer, the sweet potato and potato tubers should be applied to the cracking fertilizer after entering the expansion period. On the one hand, it can satisfy the nutrients needed for the expansion of potato chips, and promote the expansion of the roots; on the other hand, it can prevent premature senescence of stems and leaves, enhance photosynthesis, and increase nutrient accumulation. According to the test, when sweet potato is applied to crack fertilizer, it can generally increase yield by about 30%. The time when the sweet potato is applied to the cracked fertilizer is generally carried out when cracks appear on the surface. The specifics should be based on the growth of sweet potatoes and soil conditions. For example, in the early stage, the field of fertilization is insufficient, the soil layer is shallow and the plant growth is poor. The field can be applied as early as possible. The amount of topdressing can be applied to the decomposed human and animal manure 800 to 1000 kg per acre, or 6 to 7 kg of urea. 600 kg, sloping cracks. If the field with sufficient fertilization in the early stage and strong plant growth can be applied less or only soil fertilizer and potassium fertilizer, no nitrogen fertilizer. Immediately after topdressing, the soil was plucked, and the soil was crushed in the trench to be cracked at the crack in the surface. Linyi Fertilizer Network Copyright

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