Effects Of Sowing Cultivation In Winter And Spring And Intercropping On Yield And Quality For Codlopsis Piosula(franch.) Naff.

This cultivated patterns for Codonopsis pilosula(Franch.) Nannf.sowed and transplanted in different seasons based on single and intercropping were studied under field experimental conditions combining with indoor tests in order to explore the best single and intercropping pattern for cultivating the medical plant. The main results are as follows:1. The results of contrast experiment sown in winter and spring showed that the climatic condition in the experimental area is suitable for cultivating C. pilosula seedlings. Under the winter and spring conditions, the changes of emergency was in ?S‘ trend and complied with a Logistic. Compared with the spring-sowing field, the soil moisture in 0-20 cm of soil layer in the winter-sowing field was higher resulted in 6 d earlier in seedling emergence and the yield was increased by 47.8% with good quality in individual seedling. By contraries, the emergence rate of seedlings in the spring-sowing field was increased by 27.3%, but the seedlings were small with poor in commercial quality. In conclusion, the seedling cultivating sown in winter was of great significance to excude the spring drought, suggesting that the seedling cultivating methods sown winter should be adopted in proportion in order to reduce the seed ablastemic risk when sown in spring caused by the severe drought. It is worth noting that when cultivating the plant seedlings whether sown in winter the keeping-moisture measures should be promptly taken after sowing and the wheat straw is the perfect for the coverage.2. The growth dynamic pattern of the plant under winter and spring conditions exhibited ?S‘ curve fitted to Logistic equation and the fast growth stage showed during 10-28 d after the seedlings emergenced. The transplant in next spring year could avoid over-growth but inproved the plant root development and regreen vigor resulting in good quality and high yield than that of the winter transplanted treatment, decreased by 4.31%in root rot disease and 0.75% in the disease state index, however, increased by 433.34 kg/hm2 in the medical roots and 1.21% in lixiviated substances. The water conter in 40-60 cm of soil layers in all growth stagein spring tranplanted field were all higher than that of the winter field, espectially in blossom stage condtructed good conditions for the medical root and seed production. Under potato residue, the plant cultivated in winter and spring increased by 3001.32 kg/hm2 and 976.27 kg/hm2 in yield, 0.37% and 0.07% in lixiviated substances, indicating the medical plant adapted to be transplanted and cultivated in spring and the potato residue was better than the Saposhnikovia divaricata.3. By comparing with single and intercropping, the results showed that the crop pattern had great effect on the growth development, medical yield and benefit. When the plant intercropped with Astragalus membranaceus, the effective plants showed more resulting in higher yield and food quality and single root increased by 16.4, 11.1 and 13.2 thousand yuan/ hm2 respectively compared with that intercropped with corns and broad bean, indicating that the plant continuous cropping obstacle could be mitigated when the plant intercropped with Astragalus membranaceus because of low incidence of root rot and high efficient cultivation.