Abstract:

In order to find out the soil of fertilizer and the dynamic change of nutrition variation in potato plants on different soil sort after planting potatoes, the fertilizer indexes of dissimilar sorts of soil and dynamic change content of nitrogen, phosphorus and potassium of potato plant in different periods were studied under the same level fertilization by randomized block. The results showed that, by using compound fertilizer, it reduced the pH of soil, decreased the content of slowly available potassium and soil organic matter, and increased the content of total nitrogen, phosphorus, and the content slowly available nitrogen, phosphorus and potassium, but the variety of total potassium differed depending on soil sort. The content of nitrogen in overground plant was higher than underground plant which was between 2.5% to 5% in former, and 0.5% to 2.5% in latter. The content of potassium decreased from seeding to mature periods, and it dropped among seeding stage, squaring stage, tuber middle stage and mature stage. It reduced in phosphorus content of underground plant among different growth stage, and it was higher in seeding stage than mature stage. The content of potassium in overground plant had litter change in dissimilar growth stage, and it decreased in underground plant from seeding stage to mature stage in different soil sort. The different was significant in content of between overground to underground in dissimilar cultivation soils.