The cultivation of digging holes in Chinese yam is not high-yield.

Chinese yam burrowing cultivation is a kind of cultivation technique which has been hyped by the media in recent years. The so-called burrowing cultivation means digging a hole 8 cm thick and 150 cm deep in the position where the yam is planted, so as to make the yam grow vertically down the hole, so as to avoid the pain of digging ditches in the traditional cultivation methods. At first glance, this cultivation method seems to be good, it does not take much effort to create a good growth environment for yam. However, in practice, Li Zhenyu found that in addition to labor-saving and labor-saving, this cultivation technique is not conducive to high yield. It is unrealistic for Chinese yam to create a good rhizosphere environment by digging a hole without digging a ditch before planting. Practice has proved that the yam cultivated by burrowing does not grow thick and straight in the hole as people think. Li Zhenyu believes that although burrowing cultivation can also create a relatively good rhizosphere environment for yam, after all, the scope of this environment is very narrow, which is not conducive to the extension of the root system of yam. In addition, if the soil can not be turned deeply, it can not be fertilized deeply, which is also an important reason that is not conducive to the root growth of Chinese yam. It can be seen that Chinese yam drilling cultivation is only a kind of lazy cultivation method, and it is not a good measure to promote high quality and high yield of Chinese yam, so it is not advocated in production. At the same time, Li Zhenyu pointed out that if the yam is to have high quality and high yield, the basic measures must be done well: first, the soil should be deeply ploughed before planting, with a depth of 70m / 100cm, and once a year in combination with fertilization, with a depth of 40cm. The second is to re-apply organic fertilizer. With the deep ploughing, 4000 kg of high-quality chicken manure and 60 kg of compound fertilizer can be applied per mu. If combined with biological fertilizer, the effect will be better. Third, we must adopt deep ditch and high border to optimize the rhizosphere growth environment of Chinese yam.