Seedling culturing method for purple sweet potatoes

Abstract

The invention provides a seedling culturing method for purple sweet potatoes, and belongs to the field of purple sweet potatoes. The seedling culturing method includes the steps that a, purple sweet potato tender stem segments with shoots are trimmed into small segments and then sterilized; b, the small segments in the step a are subjected to proliferation culturing in a proliferation culture medium containing active carbon powder, so that seedlings are obtained; c, the seedlings in the step b are cultured in a rooting culture medium, so that purple sweet potato proliferation culturing seedlings are obtained; d, after being hardened, the purple sweet potato proliferation culturing seedlings are sterilized and transplanted. The seedling culturing method has the advantages that during proliferation culturing, the active carbon is added to reduce the browning rate of stem tips, callus induction and differentiation are easy, the secretion and activity for growth of related protein enzymeson the stem tips are improved, the seedlings have robust activity, during rooting culturing, auxin type substances are not prone to being degraded by light and can reach acting positions through complexing and decomplexing to realize the effect of adjusting growth, finally, root systems of the seedlings are sturdy and dense, and the survival rate of transplantation can reach 100%. The seedling culturing method for purple sweet potatoes is good in culturing effect and high in survival rate of transplanting.

Description

technical field [0001] The invention belongs to the technical field of purple sweet potato cultivation, and in particular relates to a purple sweet potato seedling raising method. Background technique [0002] Purple potato (Ipomoea batatas (L.) Poir. Convolvulaceae Convolvulaceae sweet potato genus) is also called black potato, and the potato meat is purple to dark purple. In addition to the nutrients of ordinary sweet potatoes, it is also rich in selenium and anthocyanins, and purple potatoes are one of the main raw materials for anthocyanins. Purple sweet potato likes a warm climate environment, and the suitable growth temperature for stems and leaves is 18-25°C, and stops growing when the temperature is lower than 15°C. The optimum growth temperature of tubers is 22-24°C, and the growth will stop when the ground temperature is lower than 20°C. [0003] In the process of introduction, propagation and production of new varieties or lines of purple sweet potato, vegetativ...

AI Technical Summary

Problems solved by technology

At present, the seedling raising method of purple sweet potato mostly adopts soil cultivation and seedling cultivation, which is greatly affected by the temperature environment, has certain seasonality, low seedling yield, difficult control of conditions, uneven emergence, and is not conducive to unified management. Therefore, a kind of High-efficiency seedling raising method of purple sweet potato, improving the yield and quality of seedling raising, and expanding the planting scale of purple sweet potato

At present, purple sweet potato seedlings are mainly raised through the following methods. One is to use large seedling sheds to promote the growth and development of seedlings through external heating. The potato is buried in the soil as a whole. This method of raising seedlings will lead to difficulty in germination of the lower part of the purple potato, poor seedling emergence rate and quality, low seedling raising efficiency, poor seedling survival rate and survival quality, which is not conducive to the breeding and planting of purple potato.