The old sweet potato grower Lao Zhao, this year is a stall! Lao Zhao planted 3 acres of sweet potato, from the seedling stage to the harvest period are carefully managed, no matter from the leaves or vines look particularly good, the leaves are green and green The old Zhao sees people boasting that their sweet potatoes are growing well, definitely a bumper harvest! Time passed quickly, Lao Zhao finally waited until the sweet potato matured, and it was really said by Lao Zhao. This year, the old Zhao Yimu real estate has more than 7,000 kilograms of sweet potato, which can make the old Zhao Wanwan unexpectedly, the sweet potato is rich. But most of the sweet potatoes have cracks, the quality is particularly poor, which gives the old Zhao's heart cool! After a few months of hard work, the result is this, the high yield is not as good as the high yield! In order to figure out exactly where the problem lies, Lao Zhao ran several farmer's shops to find agronomists! Invited to the ground to see what happened! After the teacher's soil analysis, it was found that the nutrients of the old Zhao sweet potato were very unbalanced. Looking at the plot again, the water supply is not uniform, and there are some underground pests, which is the main cause of the splitting of sweet potatoes! First, let the teacher analyze the following reasons, causing the red potato crack: 1. The problem of the variety itself. 2, soil compaction, not loose, poor gas permeability, less organic matter. 3. The nutrient elements in the soil are not balanced, and the absorption of calcium and boron is insufficient. Among them, calcium deficiency is related to drought or excessive application of nitrogen and potassium fertilizers; boron deficiency is caused by soil drought or excessive application of potassium fertilizer, which hinders the absorption of boron; under high temperature conditions, plant growth is accelerated, because of the poor mobility of boron, The supply is not timely, resulting in local boron deficiency. 4. Uneven water supply during growth. Suddenly encounter large water after long-term drought, causing rapid growth of potato, while the epidermal growth rate is slower than the internal and break the epidermis. 5. It is caused by the underground pests of potato tubers, especially the diamond-necked golden worm, which is the main underground pest of sweet potato. Second, how to manage to reduce the sweet potato crack? 1. Variety selection: The virus-free and early-maturing varieties are selected, which can be harvested after more than three months of planting, and can be listed in the wrong season, and obtain considerable economic benefits. 2. Fertilizing ridges: Sweet potato is drought-tolerant, and early-ripening cultivation should choose sandy soil with good drainage and high ground. Sweet potato needs a ratio of nitrogen, phosphorus and potassium of 1:0.7:2. It also needs a certain amount of trace elements such as zinc, iron, manganese and boron. The sweet potato avoids chlorine, and the chloride ion sweet potato in potassium chloride is difficult to absorb and affects. Sweet potato quality, so it is better to apply potassium sulfate in production. Combined with fertilization and deep ploughing, the ridge height is about 30 cm, the ridge width is 50-60 cm, the small row width is 50-60 cm, and the large row width is 70-80 cm. It is covered with plastic film and can also be cultivated with small arch shed. 3. Scientific management: Sweet potatoes enter the middle of growth to prevent exposure. Timely control of leaf curlers, sweet potato hawk moths, etc., when entering the rainy season, it is easy to cause the roots of potato vines to grow. At this time, the grass can be combined with the weeding, the rooted vines are lifted and rooted, and then returned to the original place. For the general ground and premature aging plots, watering should be combined with about 15 kg of potassium sulphate compound fertilizer per acre, while spraying potassium dihydrogen phosphate and sweet potato swells 2 to 3 times. I believe that after this study, Lao Zhao basically understands what is going on. I hope that through this guidance, Lao Zhao can grow better sweet potatoes! I also hope that this article can help more sweet potato growers and have a good time. Harvest! Guangzhou Zhongzhinan Supply Chain Co.,Ltd. , https://www.zhongzhinanlighting.com
What is the cause of sweet potato cracking? Control measures for sweet potato cracks