Potatoes are high-potassium crops and have a large demand for potassium. However, at present, many farmers planting potatoes, emphasis on the application of nitrogen and phosphorus fertilizers, potassium dosage is not even without potassium fertilizer. Planting potato for many years in the same plot, due to the large consumption of potassium in the soil, makes the ratio of fertilizer supply imbalanced, which is the main factor limiting the increase of production.
Effect of Potassium Fertilizer on Yield and Quality of Potatoes According to experiments, potato was topdressed with potassium fertilizer at the seedling stage, initial bud stage and early flowering stage, and its yield increase rate was 16%, 39.2%, and 35.4%, respectively. Potato starch content increased by 1.1%, 2.7%, and 1.8%, respectively. The tuber size is also an important index to measure the commercial nature. In the different periods, potassium fertilizer was topdressed. The rate of large and medium tubers increased by 5.5%, 11% and 8.2% respectively.
The mechanism of increasing potassium production and improving quality 1. Potassium is an activator of various enzymes, which can promote the operation and synthesis of proteins, nucleic acids and carbohydrates, promote the transport of soluble sugars and the synthesis of starch, and increase potash fertilizer, which can make potato stems The healthy growth of leaves accelerates the synthesis and accumulation of organic matter and promotes the expansion of tubers.
2. Potassium fertilizer can increase the photosynthetic intensity and chlorophyll content of potato. The experimental results showed that the photosynthetic intensity of potash-fertilized potato increased by 10.8-22.2%, and the chlorophyll content increased by 8.3-19.2%. Potassium application increased the content of auxin, zeatin, nucleotides, and gibberellin in the later growth stage of the plant and enhanced the The activity of various organs, delay the speed of aging, and help increase production.
Potato potassium application technology based on a certain level of nitrogen and phosphorus fertilizer, generally topdressing 14-15 kg of potassium per acre, using acupuncture methods, after the application of soil. Experiments have shown that potassium sulfate is more effective than potassium chloride.
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