Five reasons why it can lead to low yields

Recently, editors often received some consulting calls saying that the yield of Gastrodia elata they cultivated was not high, and some of them were even less than 3 kg / m2. The reporter specially consulted Gastrodia expert Cao Debin of the Provincial Academy of Agricultural Sciences on these issues. According to his introduction, according to the growth principle of Gastrodia elata, there are many reasons for the low yield of Gastrodia elata. He listed the following five reasons. According to their own production conditions, farmers can see if there are any of the following conditions.

First, Armillaria mellea has been passed on for many times, aging and degeneration. Armillaria mellea is the only source of nutrition for Gastrodia elata. Therefore, the quality of Armillaria mellea directly has an irreversible effect on Gastrodia elata. In general, it is required to use pure bacteria that have been detoxified and isolated, or to cultivate bacterial materials with this strain, so as to ensure the effect. However, some farmers in order to reduce costs, or use ordinary bacteria, or use old fungus materials as "bacteria", mixed with some new Linden wood to make it "spread bacteria". If pure bacteria are used for the first time, the method can be used the next year, but, no more than three years, unlimited continuous "transmission", the consequence must be strain degradation, vitality reduction, resulting in Gastrodia elata production reduction.

Second, ordinary hemp species, for many years of self-propagation and self-use, vitality decline. In the production of Gastrodia elata, it is generally required to use hybrids, just as the use of hybrids in corn and cabbage is a reason, and the advantage of hybridization can enable people to obtain ideal production results; traditional hemp seeds are mostly the product of "handed down from generation to generation", in order to reduce costs, some farmers have been insisting on self-propagation and self-use, and finally found that the yield is "worse than year after year", but the reason is unknown.

Third, the sand cultivation is too fine and the air permeability is poor. Like other organisms, Gastrodia elata needs to breathe during its growth. therefore, medium and coarse sand is required in general cultivation, and soil with high humus is used when cultivated directly with soil. if you use clayey soil or very fine sand such as the Yellow River sand, it is impossible to ensure the normal growth of Gastrodia elata.

Fourth, the groundwater level of the cultivation site is high and water is stagnant for a long time. It is well known that Armillaria mellea can survive and expand in water, but as a plant, Gastrodia elata does not have this ability. after only three days of stagnant water, Gastrodia elata can be completely wiped out, or be "vacuumed" by Armillaria mellea, or directly rot away.

Fifth, the harm of diseases and pests. There are few diseases in the cultivation of Gastrodia elata, mainly some miscellaneous fungi carried on mushroom or Linden wood, which together infringe on Armillaria mellea and compete for nutrition, so that Armillaria mellea can not grow normally, so that Gastrodia elata can not absorb nutrients normally, resulting in low yield; pests are mainly underground pests such as grubs, biting hyphae and Gastrodia elata.