Soilless culture method improving content of organic selenium of okra
The technology of soilless culture and soilless culture substrate is applied in the field of soilless culture for improving the organic selenium content of okra, can solve the problems of long process of obtaining biological selenium, high fertilizer cost and high requirements, and achieves the improvement of resistance to diseases and insect pests. capacity, improved health, increased productivity
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Embodiment 1
[0025] A kind of soilless cultivation method that improves okra organic selenium content, comprises the following steps:
[0026] (1) Preparation of soilless culture medium: 300 parts of crop straws were crushed to a length of 2 cm, mixed evenly with 120 parts of animal urine, 400 parts of industrial and agricultural by-products, and 0.3 parts of selenium dioxide to obtain a fermentation base material. The material is fermented at 28°C, and the material is turned over every 12 hours. After 21 days, when red nano-selenium appears in the fermentation bottom material, the fermentation is ended to obtain decomposed organic matter.
[0027] Mix 600 parts of decomposed organic matter and machine-made sand evenly to obtain a soilless culture substrate containing nano-selenium; the particle size of the machine-made sand is 1cm;
[0028] (2) Seedling selection: select robust okra seedlings with a height of 6 cm, soak the roots of okra seedlings with 0.3% potassium permanganate so...
Embodiment 2
[0032] A kind of soilless cultivation method that improves okra organic selenium content, comprises the following steps:
[0033] (1) Preparation of soilless culture medium: 350 parts of crop straws were crushed to a length of 1 cm, mixed evenly with 100 parts of animal urine, 350 parts of industrial and agricultural by-products, and 0.1 part of selenium dioxide to obtain a fermentation base material. The material is fermented at 30°C, and the material is turned over every 12 hours. After 14 days, when red nano-selenium appears in the fermentation bottom material, the fermentation is ended to obtain decomposed organic matter.
[0034] Mix well the decomposed organic matter and 1000 parts of machine-made sand to obtain a soilless culture substrate containing nano-selenium; the particle size of the machine-made sand is 2cm;
[0035] (2) Seedling selection: select healthy okra seedlings with a height of 10 cm, soak the roots of okra seedlings with 0.6% potassium permanganat...
Embodiment 3
[0039] A kind of soilless culture method that improves okra organic selenium content, comprises the following steps:
[0040] (1) Preparation of soilless culture medium: crush 400 parts of crop straws to a length of 0.5 cm, mix them with 150 parts of animal urine, 500 parts of industrial and agricultural by-products, and 0.4 parts of selenium dioxide to obtain a fermentation base material. The material is fermented at 32°C, and the material is turned over every 12 hours. After 20 days, when red nano-selenium appears in the fermentation bottom material, the fermentation is ended to obtain decomposed organic matter.
[0041] Mix the decomposed organic matter and 800 parts of machine-made sand evenly to obtain a soilless culture substrate containing nano-selenium; the particle size of the machine-made sand is 1.5cm;
[0042] (2) Seedling selection: select strong okra seedlings with a height of 8 cm, soak the roots of okra seedlings with 0.5% potassium permanganate solution ...
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