Can the cultivation method of planting sweet potato "inverted seedlings" really increase production?

Sweet potato originated in South America, which is a crop with strong adaptability and high yield. It was introduced to China in Ming Dynasty. Under the social background at that time, the grain output was low, and a large number of people lived on the subsistence line. Sweet potato solved the problem of eating at that time, so it was widely planted. Relevant literature shows that the population of China increased linearly in Ming and Qing Dynasties, and to some extent, sweet potato contributed a lot.

After hundreds of years of development, China has formed quite mature sweet potato planting technology, and the yield and planting scale have long been different. At present, China's sweet potato is mainly planted in Anhui, Hebei, Henan, Fujian and other places, and it is an important agricultural cash crop. Statistics show that China is the largest producer of sweet potatoes in the world, with an annual planting area of about 80 million mu and a yield of 1 100 million tons.

Although sweet potato cultivation has a long history, many growers must have heard that sweet potatoes can be planted upside down for the first time. What is the technology of "inverted planting" of sweet potato? Some people say that the roots of sweet potatoes are exposed on the ground and the stems and leaves are inserted in the soil. Some people say that the stems and leaves of sweet potatoes have been cut off, leaving only the trunk and cutting it in the soil. Others say that sweet potato inversion is metaphysics and has no scientific basis. In the author's opinion, it is natural to plant sweet potatoes with a good harvest, but it is a probability problem to plant sweet potatoes with a good harvest.

According to the related literature, inverted planting of sweet potato has two advantages: first, inverted planting of sweet potato can avoid the problem of excessive growth of sweet potato, and all nutrients absorbed by roots are transported to vines, so that tuber growth can not get enough nutrients, and inverted planting can solve the problem of uneven distribution of nutrients; Second, the tuber of sweet potato can grow rapidly and its yield will increase after gaining nutrients. That sounds reasonable, but is it really true?

There are two reasons for the excessive growth of sweet potato vines: one is the large amount of nitrogen fertilizer applied; Second, the amount of watering is too large. Assuming that the amount of nitrogen fertilizer is small and the management of water and fertilizer is not in place, the advantages of inverted planting will not be reflected, but the yield and quality of sweet potato will be reduced. Instead of using inverted seedlings with uncertain harvest, it is better to use straight seedlings, do a good job in variety selection, water and fertilizer management and pest management, and the same harvest can be achieved, and the probability is higher than that of inverted seedlings.

Back to the question of what is inverted seedlings, an author in the headline explained that inverted seedlings are lodging, not lodging, or in the form of horizontal seedlings. Horizontal transplanting refers to planting seedlings horizontally in the soil, with plants about 5-6 cm in the soil and a small number of leaves at the top. According to this understanding, pouring sweet potato is really beneficial to growth, which accords with basic logical cognition and increases the probability of harvest.

Planting sweet potatoes horizontally and upside down has two advantages: first, the contact surface between seedlings and soil is large, which is conducive to the rooting of sweet potatoes and can obtain water and nutrients; Second, there are few exposed parts of seedlings, which can avoid the problem of vine overgrowth. Compared with sweet potato planting, the traditional planting method has a long history, and there are complete solutions when problems occur, while the new planting method has high yield probability, but it lacks systematic solutions when problems occur. Agricultural planting can not only solve problems by probability, but also use advanced planting techniques and management methods to improve yield.

At present, the planting technology of sweet potato inverted seedlings is immature and only stays in the concept and hypothesis stage. Whether it can be popularized on a large scale will take time to test. Finally, I want to say: when the sweet potato inversion is not widely promoted, don't try it rashly, and then try it when the technology is mature. Inverted sweet potato is like a detour in Jin Yong's novels. It looks attractive, but it also has its own unbearable consequences.