What kind of potato seedlings are really strong seedlings?
If the potato seedlings are strong, the survival rate after planting is high, the roots return to the seedlings are fast, the potatoes are set early, and the yield is high. Strong seedling standard: stem thickness and short nodes, moderate age and tenderness, 5-7 internodes, 100 seedlings weigh more than 1 kg of spring seedlings, and 1 summer seedlingMore than 5 kg, length of about 25 cm, thick leaves, dark green color, thick roots, stems and leaves have the characteristics of this variety, sap, no black roots, ** roots, no pests and diseases, neat cutting.
Why is seed potato selection particularly important for cultivating robust potato seedlings?
Sweet potato is a vegetative crop, once infected with a viral disease, the virus will continue to multiply and accumulate in the sweet potato body, and be passed on from generation to generation, so that the amount of virus will increase from generation to generation. The incidence of sweet potato virus disease is high, and the yield is seriously reduced. So far, there is no sweet potato variety that can be highly resistant to viral diseases at home and abroad, and there is no agent that can effectively prevent and control viral diseases, so we must select seed potatoes and choose detoxified seed potatoes as much as possible. When choosing seed potatoes, it is necessary to choose healthy and disease-free, insect-free, smooth skin, bright color, moderate size (150 grams and 400 grams), and summer potatoes with the characteristics of this variety (be sure to choose summer potatoes, high vigor, high seedling emergence rate, and robustness).
Therefore, if you want to grow strong, seed potatoes are the key!
Editor: Shao Shuai.
Proofreading: Li Yunfei.
Second trial: Zhao Min.
on the Internet).