Carefully identify the authenticity of medicinal seeds
In order to prevent farmers from being deceived when purchasing medicines, the methods for identifying the authenticity of the seeds of several Chinese herbal medicines are described below: 1. Astragalus perennial herb, medicinal root. The new seeds are round, black-gray, two cotyledons, and bean blue. The new seeds are lightly twitched with the thumb and index finger, and a thin layer of yellow skin can be plucked. The kernels are white, the seed particles are neat, and the impurities are few. The light phlegm is bean blue, and the oil is bright; the seed skin is black and yellow, like Pan fried color, starch extrusion is easy to break, no beans cyan, no oil, seeds full grain, small grain, many impurities, light bark was bright yellow, translucent, and broken pieces. Second, the Astragalus points cotton aphid (soft orange) and film Astragalus (hard orange) two. Its seeds are flat kidney-shaped, dark brown, depression in the middle, wiped off the surface of the powder, dark and shiny, small particles more thin and thin. When identifying the new Chen, it is advisable to put a few seeds into the glass, pour boiling water and stir for one minute, then add cold water to adjust the temperature to 40°C. After soaking for 20 minutes, pour the water out with two fingers, if the kind of kernel is yellowish white or white green. Cotyledons are separated and leaf buds are revealed as new seeds; if the seed kernels are chestnut-colored, not bright, cotyledons indifferent, and no leaf buds exposed, they are Chen seeds. The seeds of Scutellaria baicalensis have a vitality of 3 years, and the germination rate of new seeds is generally 70% to 80%. With the extension of time, the germination rate will gradually decrease. Third, the white peony seeds are cracked flat round, yellow-white, thin wings on the edge, the new seed green, on the palm of the hand with the thumb pimple, species of wing edge soft crushed, but the species around the wings hard, white kernels. After the new seeds rained, the seed coat was slightly dark, and the surface looked like Chen seeds. As long as the seed was white and bright after one seed, it was still a new seed. On the contrary, all kinds of wings were knocked out, and the seeds were dried and yellow, and they were Chen seeds. The germination rate of seeds every other year is very low. Four, Bupleurum Huang Bupleurum fruit oval, dark brown seeds, the surface is rough and shrunken, there are five edges, the kind of green and white, oily, about 2mm, diameter of about 1.5mm, short and thick. Black Bupleurum is similar in color to yellow Bupleurum, and has a slender, about 2.5 mm in length and a diameter of about 1 mm.