A field drought tolerance identification method of sweet potato

Abstract

The invention discloses a method for identifying the drought resistance of sweet potatoes in a field, and belongs to the technical field of identification of the drought resistance of the sweet potatoes. The method comprises the following steps: scissoring 25-30cm healthy sweet potato seedlings to be identified, inserting into ridges with drip irrigation facilities, and after inserting, watering once through drip irrigation; after inserting, watering control materials once on the 15th day, 30th day, 45th day, 60th day, 85th day and 110th day respectively, while not watering drought resistance identification materials on the 30th day, but watering normally at the other time, controlling the watering amount to be 40m<3> / 667m<2> each time, investigating the yield of underground sweet potato tubers in the harvesting process on the 130th day, calculating the relative yield, and judging the drought resistance of sweet potato varieties according to the relative yield (varieties with the relative yield being higher than or equal to 60% have strong drought resistance, varieties with the relative yield being higher than or equal to 50%, but lower than 60% have medium drought resistance, and varieties with the relative yield being lower than 50% have poor drought resistance). The method is easy to operate, practical and high in efficiency; and the drought-resistant materials identified by the method can be directly applied to sweet potato production.

Description

technical field [0001] The invention relates to a method for identifying drought tolerance of sweet potatoes, in particular to a method for identifying drought tolerance of sweet potatoes in a field, and belongs to the technical field of drought tolerance identification of sweet potatoes. Background technique [0002] The purpose of the identification of drought tolerance of sweet potato is mainly to screen the varieties suitable for cultivation in arid areas from the bred sweet potato varieties and to promote the breeding of new varieties with drought tolerance, high quality and high yield. Sweet potato is a diversified crop integrating new energy raw materials and processing materials. In view of the current shortage of cultivated land, in order to "not compete with others for food and land", and sweet potato is a kind of crop with strong adaptability and stress resistance. crops, inland salinity, drought and other marginal land and hills and mountains are the new world fo...

AI Technical Summary

Problems solved by technology

In order to promote the screening and identification of sweet potato drought-tolerant resources and other materials, predecessors have simulated drought treatment by sheltering rain to identify the drought tolerance of sweet potato, and no longer watered sweet potato since it was planted, resulting in the failure of most varieties to form effective yields. Moreover, there is no step-by-step identification of different water-demand periods in the sweet potato growth period, which may easily lead to missed selection of drought-tolerant resource materials. The screening method has no direct guiding effect on sweet potato production, and the screened materials cannot be directly used in sweet potato production.

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