Cultivation Techniques of Chinese Cabbage Caixin

The seed collection area should not be located in the main production zone of Chinese cabbage. Instead, it is generally recommended to establish the seed production site in northern regions that are suitable for growing cruciferous crops. It is essential to keep this area at least 1,000 meters away from fields where Brassica vegetables such as Chinese cabbage, turnips, mustard, and rapeseed are cultivated, to avoid cross-pollination and contamination. To ensure seed purity, early spring sowing should be carried out, and during the critical growth stages—especially before and after flowering—regular weeding and thinning operations must be conducted. Only healthy plants with distinct variety characteristics, strong growth, sparse internodes, compact flowering clusters, small loquat-like leaves, and good resistance to diseases should be selected and retained. Proper nutrient management is crucial. A balanced application of phosphorus and potassium fertilizers will support robust plant development and seed quality. Effective pest and disease control measures should also be implemented throughout the growing season to minimize losses. Once the plants enter the flowering stage, it's important to remove the top portions of the plants to encourage even seed maturation and full grain development. In windy areas, staking or using supports should be done prior to flowering to prevent lodging and reduce yield loss. Harvesting should begin when the early varieties start to turn yellow and the seed coats turn reddish-brown. At this point, the plants can be cut, dried, and threshed. After thorough cleaning and sieving, the seeds should be stored in a cool, dry place to maintain their viability and quality for future planting.

Nootropic Products

In China, nervous system drugs are also one of the drugs with the most rapid sales growth in recent years. In 2002, nervous system drugs occupied 5.9% of the entire pharmaceutical market share, and the total sales amount increased by 9.4%.
With the increasing trend of urbanization and aging, the elderly population in China has exceeded 120 million, and the incidence of geriatric diseases, especially mental diseases, is increasing year by year. With the increase of residents' income, the elderly's requirements for quality of life also increase. As a result, the demand for drugs to treat mental illnesses such as Alzheimer's has soared. In WHO drug classification, psychotropic drugs and nootropic drugs are grouped into one class. We briefly analyzed the development trend of this class of drugs through the clinical drug use data collected from more than 300 domestic key hospitals by Chinese Pharmaceutical Association.
The overall market size of this class of drugs is about 1.22 billion yuan, the consumption sum increased by 5.0% in 2002, but the sales quantity increased by 11.2%. The main reason why the consumption sum did not increase with the sales quantity is that several main varieties of this class of drugs, such as piracetam, cobalt bin amide and ginkgo biloba leaf, etc. In 2002, the price of selling units fell sharply due to bidding. Among these drugs, ginkgo biloba preparation occupies the largest market share, accounting for more than 1/3 of the market share, ganglioside ester and cobalt bin amide combined also occupy nearly 1/3 of the market share, piracetam and other "sitan" drugs occupy nearly 10% of the market share, the rest of the drugs occupy less than 5% of the market share. At present, more than 20 ginkgo leaf production enterprises, piracetam production enterprises more than 70, have entered the stage of price competition, profit repeatedly diluted.
In the first-line varieties, except ginkgo biloba leaves preparation maintained vigorous vitality, the growth of other varieties were weak, especially the traditional variety piracetam suffered from bidding

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