Planting technique of Yuanhu

Yuanhu, also known as Rhizoma Corydalis and Rhizoma Corydalis, is a perennial medicinal plant with tubers, which is one of the commonly used Chinese herbal medicines, so what is the planting technology of Yuanhu?

Planting techniques of Rhizoma Corydalis

The cultivation techniques of Rhizoma Corydalis can be summarized into four sentences: "shallow, thin, warm and wet". The so-called shallow point, that is, the depth of planting (covering soil) should be 2 inches; sparse, that is, the sowing density should be 2.5 inches square or 2 × 3 inches between rows and plants; warmer, that is, to keep warm for the winter; and a little wet, that is, the side of the box should be kept moist and not too dry.

1. Select the place

To plant Rhizoma Corydalis, we should choose fertile land (field) with deep soil layer, good irrigation and drainage and high soil organic matter content. Sandy loam is suitable, such as sandy mud, semi-sand and semi-mud field, alluvial soil is the best. Dead yellow mud, white loessial soil and gravel soil are not suitable for planting. The physical and chemical properties of soil should be neutral or slightly acidic, and the pH value is usually about 5.6-7.5.

The root system of Rhizoma Corydalis is mainly distributed in the 1-3 inch topsoil layer. The looser the soil is, the more developed the root system is, which is beneficial to the expansion of stem nodes and the absorption of nutrients. Soil consolidation is not conducive to the growth and expansion of stems and branches, the stem nodes are small and the yield is low. If the soil is alkaline, it is easy to form stiff seedlings, grow slowly, and root whiskers (stem branches) atrophy. The soil quality through sand has poor water and fertility conservation, which is easy to form premature senescence, and the growth is inhibited because the sand absorbs heat too strongly, the temperature difference between day and night changes greatly, and the ground temperature exceeds the environment needed by crops.

2. Land preparation

After planting Rhizoma Corydalis, the first step is fine farming. Three ploughing and three harrowing, finishing the topsoil into loose and fine loam, which is the basis for winning Yuanhu to increase production. If there are many large soil blocks in Yuanhu field, it will not only affect seedling emergence, but also hinder root growth, which will seriously reduce the yield in the coming year. Yuanhu field preparation should be combined with sufficient base fertilizer, because the root of Yuanhu is shallow like fertilizer, and the growing season is short, so applying sufficient bottom fertilizer is the key to increase production. According to the analysis of the results of large area high yield experience, better yield can be obtained by applying rotten pig and cattle manure, cruller fertilizer and phosphate fertilizer per mu. If indiscriminate application of cruller fertilizer or direct contact with unrotten fertilizer will cause burning of seedlings, although the seed stem does not change color, nor rot, the bud will stop growing after 1-2 cm of germination. If too much nitrogen fertilizer is applied, it will cause the stems and leaves to grow, lodge in the case of heavy rain, and create favorable conditions for the parasitic reproduction of downy mildew spores, resulting in mass death after infection, resulting in reduced yield. Therefore, in the application of cruller fertilizer, early fermentation is beneficial to the full absorption of Yuanhu root system.

3. Make a compartment

Immediately after the consolidation of the plot, it is usually appropriate to use the horizontal box, which is beneficial to drainage and irrigation. at the same time, the box surface is short and easy to flatten, which can improve the land utilization rate. The reasonable use area of one mu of land is about eight points. Generally, the width of the chamber is 4 inches, the width of the trench is 7 inches-1 foot, and the depth of the trench is 5-7 inches. The specific structure is shown in the figure: