Potatoes are potassium-producing crops and have a large demand for potassium. However, many farmers who plant potatoes nowadays prefer to apply nitrogen and phosphorus fertilizers, with less or no potassium fertilizer. Planting potatoes for many years in the same plot, due to the large consumption of potassium in the soil, makes the proportion of fertilizers imbalance, which is the main factor limiting the increase of yield.
Effect of potassium application on potato yield and quality According to the experiment, the potato was applied with potassium fertilizer at the seedling stage, early bud stage and early flowering stage, and the yield increased by 16%, 39.2% and 35.4%, respectively. The potato starch content increased by 1.1%, 2.7% and 1.8%, respectively. Tuber size is also an important indicator to measure the commodity. The potassium fertilizer is applied in different periods. The rate of large and medium potato is increased by 5.5%, 11% and 8.2%, respectively.
Potassium is a mechanism for increasing yield and improving quality. 1. Potassium is an activator of various enzymes, which promotes the operation and synthesis of proteins, nucleic acids and carbohydrates, promotes the transport of soluble sugars and the synthesis of starch, and increases the application of potassium fertilizer to make potato stems. Leaves grow healthy, accelerate the synthesis and accumulation of organic matter, and promote the expansion of potato tubers.
2. Adding potassium fertilizer can increase the photosynthetic strength and chlorophyll content of potato. The results showed that the photosynthetic intensity of potato with potassium fertilizer increased by 10.8-22.2%, and the chlorophyll content increased by 8.3-19.2%. Potassium application increased the content of auxin, zeatin, nucleotide and gibberellin in the late growth stage, thus enhancing The activity of various organs delays the aging rate and is beneficial to increase the yield.
Potassium application technology of potato is based on the level of nitrogen and phosphorus fertilizer. Generally, 14-15 kg of potassium fertilizer is applied per mu, and the method of applying the hole is applied. Tests have shown that potassium sulphate works better than potassium chloride.
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