How to observe the life history of sexual reproduction of Gastrodia elata
The seed of Gastrodia elata is composed of embryo and monolayer cells without endosperm. The seeds are very small, with an average length of 0.69 mm, a width of 0.14 mm and an average embryo length of 187 microns. After sowing in early June, half a month later, the seed embryo cells began to differentiate, the diameter of the embryo increased obviously, the middle of the seed expanded, the color of the peduncle was dark, and the newly differentiated cells at the top of the embryo were light, and then the seed coat ruptured and the embryo broke through the seed coat.
July is the rainy season in the producing area, the ground temperature is about 25 ℃ and the soil moisture is about 60%. The seeds of Gastrodia elata germinated one after another and grew to a germinated protocorm with a length of 0.8mm and a diameter of 0.49mm 26 days after sowing. The germination end is irregular, but it germinates more in June. The germinated protocorm continued to grow, 30-40 days after sowing, and by the middle of July, the average length of the protocorm was 1.19 mm and the diameter was about 0.77 mm. Part of the protocorm began to have obvious papillary bract protuberance, vegetative propagation stem protruding bract segment growth, up to 7-8 nodes, each node can grow alternate lateral buds. The relationship between protocorm and nutrition can be observed in late August. The protocorm and vegetative propagation stem can be infected by the mycelium or mycelium of Armillaria mellea. If the protocorm germinates early after sowing, if Armillaria mellea can be connected in time, the rice hemp grown before overwintering is larger, shorter and stout, and then new rice flax or white hemp can be produced in the top year, which is more than 2 cm long. By November, the largest white hemp is 2.3 cm long, 1.4 cm in diameter and weighs more than 3 grams. The growth pattern of lateral buds is similar to that of the main stem, and fat tertiary buds can be produced on lateral buds. It stops growing after November and enters a dormant period.
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How to use rice husk to cultivate bacteria and cultivate Gastrodia elata
Rice husk is a good "soil" ingredient for bacteria culture and Gastrodia elata cultivation in plain area. Its "soil", namely filler, has the characteristics of looseness, ventilation, good water permeability, rich nutrition and conducive to the growth of Armillaria mellea. The fungal cords on the branches and materials cultivated with it are stout and exuberant, and the cultivated Gastrodia elata grows well. The method is as follows: (1) 1 part of rice husk and 1 part of yellow sand (volume ratio is 1:1) or 3 parts of rice husk and 2 parts of yellow sand for fungal culture of rice husk, mix well with water and humidity 40%.
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How to plant Gastrodia elata according to different temperature conditions
The main condition needed for Gastrodia elata and Armillaria mellea is temperature. It can grow and develop normally under the condition of 2-28 ℃. How to control this condition is the most important factor in the success of Gastrodia elata production. The temperature all over the country can be divided into three types: (1) Heilongjiang, Jilin, Liaoning, Inner Mongolia, Qinghai, *. These areas must not cause the seedlings to freeze in winter, and do not need to consider the effect of high temperature on the growth of Gastrodia elata in summer. the best plan is to plant Gastrodia elata indoors and heat it up slightly in winter so that it is appropriate not to freeze indoors.
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