Method for screening variety with highest nitrogen use ratio from various cut-flower chrysanthemum varieties

Abstract

The invention belongs to the technical field of plant cultivation and breeding and discloses a method for screening a variety with the highest nitrogen use ratio from various cut-flower chrysanthemum varieties, wherein the method comprises the following steps: a) acquiring a water planting seedling; b) performing the sandy culturing primary screening: dividing the water planting seedling into two groups, performing the low-nitrogen treatment on one group while performing the normal nitrogen treatment on the other group, respectively measuring the screening indexes of each variety containing the relative dry weight, relative nitrogen content and relative chlorophyll content, and then screening 2 to 6 varieties with higher nitrogen use ratio and 2 to 6 varieties with lower nitrogen use ratio for the purpose of performing comparison; and c) performing the nutrient solution cultivating repeated screening: cultivating the varieties screened from the step b) in the nutrient solution, and repeatedly screening one variety with the highest nitrogen use ratio and one variety with the lowest nitrogen use ratio. The cut-flower chrysanthemum variety which is finally screened by using the method is used for further improving the existing cut-flower chrysanthemum variety and providing the material for researching the biological characteristics and the physiologic biochemical system of the cut-flower chrysanthemum variety.

Description

technical field [0001] The invention belongs to the technical field of plant cultivation and breeding, and relates to a method for screening varieties with relatively highest nitrogen utilization efficiency from a plurality of cut chrysanthemum varieties. Background technique [0002] Chrysanthemum (Dendranthema grandiflorum Ramat.) is one of the top ten traditional famous flowers in my country and one of the four major cut flowers in the world. It has multiple values ​​such as ornamental, edible and medicinal. my country is the origin center of cultivated chrysanthemums and the distribution center of Chrysanthemum germplasm resources. There are more than 20 species of more than 40 species of Chrysanthemum distributed in my country, and more than 3,000 cultivated chrysanthemum varieties. Among them, cut chrysanthemum is the main foreign exchange earning flower for export in my country, and facility cultivation is mostly used for annual production. At present, the use of nit...

AI Technical Summary

Problems solved by technology

Since the 21st century, researchers have successfully screened varieties with high nitrogen use efficiency in rice, corn, cotton and other species and conducted preliminary discussions on their mechanisms. Screening has not yet been reported

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