How to grow ramie?
The growth of ramie has strong adaptability to soil, and ramie can be planted in various soils such as plains, lakes, hills and mountains. However, in order to obtain high-yield and high-quality ramie products, it is required that the soil layer is deep enough, loose enough, high in organic matter, good in water and fertilizer conservation, and good in drainage of sandy loam, boehmite loam and humus loam. This crop is not suitable for the land whose groundwater level is within 1 m or which is easily flooded. Ramie fiber production is in fluvo-aquic soil, followed by purple soil, followed by calcareous soil and yellow sand, and part of it is red soil.
The yield of ramie increased with the increase of soil thickness and soil organic matter, total nitrogen, total phosphorus and available phosphorus. The increase of potassium, water-soluble boron and manganese in soil is very beneficial to the increase of fiber count. The amount of fiber in acidic soil will also increase with the increase of cation exchange capacity and replaceable calcium ion content. The pH value of soil suitable for hemp is 5-6.5, and it should be improved if it is lower than 4.5 or higher than 7.6. The pH value of ramie in acid soil is 4.4, and the plant growth is relatively short, with few ramets, slow development of fiber cells and low yield. In alkaline soil, even if the pH value is 8.0, the growth of ramie plants is not very good, with short fiber cells, thick cell walls and low yield.
The soil thickness must be greater than 60 cm, the capillary porosity should be 30% to 40%, the soil organic matter should be higher than 2%, the soil hydrolyzed nitrogen should be150mg/kg to 200mg/kg, the phosphorus should be 20mg/kg to 40mg/kg, and the potassium should be150mg/kg to 200mg/kg.