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Rape Winter Seedling Standard
Winter rape seedlings must not only be large and vigorous but also possess strong cold resistance to survive the winter successfully. The appropriate size of winter seedlings should be determined based on local growing conditions and farming practices. Generally, healthy winter rape seedlings are characterized by having 11 to 12 green leaves during winter, with a root neck diameter of more than 1.5 cm. For medium-sized seedlings, 8 to 10 green leaves and a root neck thickness of over 1 cm are considered acceptable. Weak seedlings, on the other hand, typically have fewer than 6 green leaves and a root neck thinner than 1 cm.
Proper care and management during the winter are essential for the survival and development of these seedlings. Timely application of wax fertilizer or moss fertilizer can help strengthen the plants and improve their resilience. Farmers should also focus on disease prevention and control to ensure healthy growth. In addition to measuring seedling size, other indicators such as leaf color, root weight, and plant sugar content can also be used to assess the quality of winter seedlings.
For example, in the Yangtze River region, strong and well-developed winter seedlings usually have dark green or slightly purplish leaves, and the central stem should appear normal in color. These visual cues help farmers determine whether the seedlings are ready to withstand the winter and thrive in the coming season. By combining physical measurements with visual assessments, growers can make more informed decisions about crop management and increase the chances of a successful harvest.