In order to ensure the good quality of the sugar beet varieties, field selection must be carried out when growing female roots.
First, the selection of seedlings after emergence of sugar beets, combined with seedlings, Dingmiao choose early emergence of seedlings, strong seedlings, eliminating weak seedlings and diseased seedlings.
Second, the growth period selection of beet Dingmiao, select the green leaves, normal leaf shape, strong plant growth as the parent plantlet, out of leaf shape deformity, plant growth is thin, infected with serious leaf disease plants and beet bolting plants.
The mother root that must be harvested must meet the following criteria: 1 The weight of the spring planting root should be 250-500 grams. 2 Select rot-free roots. 3 Select normal root beet, long root and fork root beet is not suitable for the mother root. 4 Select non-hollow beets as the mother root. The hollow roots are often deficient in nutrition and water supply, causing flowering branches to die prematurely and even unable to form seeds. 5 Select the small roots of the green head as the mother root, the green head is too large, the mother root has high water content, less nutrients, low sucrose content, and the mother root is not resistant to storage. 6 Select the white sugar beetroot as the mother root, eliminate root red, orange, yellow and other metamorphic beets. 7 Select roots that are not wilted, frozen, or severely damaged or mechanically damaged. For plants that cannot retain their mother roots, the leaves are cut off with a guillotine two weeks prior to harvest as a knock-out marker. These beets are trimmed as raw materials during harvest to avoid mixing with the mother root.
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