When the potato is planted, there may be problems with the emergence of seedlings. In fact, no matter what kind of planting, it is said that Miao Qi Miaozhuang and the potato are not seeded, and there are generally the following reasons:
1, no germination.
After the seed potatoes are cut into pieces, they are germinated and then sown. If the seeds are directly sown after cutting, the germination time of each stem is inconsistent, and the buds are easily infected with soil bacteria in the soil, or are eaten by underground pests, resulting in seedlings.
2, improper germination.
Early spring potato planting needs to be germinated before germination. During the germination process, time control is not good, which will lead to different lengths of potato buds; when germination, temperature and humidity control is not good, it will lead to weak and long buds, and the buds will break easily when planted. Caused the potato to sprout.
3, the block is uneven.
The size of the seed potato cuts is not uniform, and the emergence and the nutritional status are different, resulting in uneven emergence. After germination, the seeds can be planted separately according to the size of the pieces and the germination conditions, so that the emergence of the seedlings is as consistent as possible, and it is convenient for post-sow management.
4, seed potato disease.
Potato ring rot, late blight, black shank, etc. may cause the seed potato to not emerge, the seedlings rotten in the soil, and the diseased seedlings are weak.
In the process of purchasing seed potatoes, dicing, germination and sowing, the diseased, rotten and malformed seed potatoes are removed, and the seed potatoes with premature germination and weak germination are removed; the seedlings that are kept in the seedlings must be kept in the seedlings for seed retention. The seed potatoes were sun-baked for 2 days before cutting, and the cut tools were sterilized, and the seeds were immersed after dicing.
5. Underground pests.
Underground pests bite potato buds and bite the potato to cause bacterial infection in the soil, resulting in uneven emergence. Can use 2 kg of carbofuran granules or 50% phoxim 200 g of water plus 2 kg, mixed with 25 kg of toxic soil, sprinkle in the seeding ditch during planting to prevent damage from underground pests.
6, soaking seeds and phytotoxicity.
When soaking with gibberellin, carbendazim, etc., the concentration is too large and the time is too long, resulting in inhibition of budding.
7, the soil is warm and humid.
After the next seeding, when the seedlings are not unearthed, a large amount of water is poured. Due to the high soil water content, some of the potato buds may rot, resulting in slow and uneven emergence. In addition, due to the low temperature in early spring, the ground temperature rises slowly and the soil temperature is too low to provide Good growth conditions lead to the inability of potato buds to grow normally, resulting in lack of seedlings and seedlings.
8, low temperature freezing damage.
After the emergence of the potato, if it is cold or frozen, it will cause the seedling to be frostbitten and freeze to death. When the temperature drops to -2 °C, the seedlings are frozen and the leaves are rapidly wilting, and the water stains become brown, and the temperature drops to -3. At °C, the leaves and leaves of potato seedlings will be completely frozen.
Due to different varieties, cultivation methods, management methods, climate, cultivation areas, etc., the causes and control measures and effects of potato emergence may be different. The above reasons and prevention methods are for reference only and need to be adjusted according to their actual conditions. Only after understanding these reasons and making reasonable solutions, high-yield potatoes are not a problem.
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