鐵嶺縣農(nóng)田土壤肥力特征及合理施肥技術
[Abstract]:In recent years, with the rapid development of agriculture, the problem of excessive application of organic fertilizer and chemical fertilizer is particularly prominent. The characteristics of soil fertility and the classification of soil nutrients are of great significance to rational fertilization. The physical and chemical indexes of farmland soil in Tieling County were determined in this paper, and the fertility of soil fertilizer supply in this area was grasped. The status of nutrient classification in this area is clarified and the map of soil nutrient grading in the project area is drawn up. Based on this, the fertilization scheme in this area is formulated, which is of great significance to the rational fertilization in this area. The results showed that: (1) the average soil organic matter content was 2.01, most of the soil area was still deficient and moderate, but the area lacking organic matter was decreased. (2) the average total nitrogen content was 1.16 g / kg, which was slightly higher than that of the second soil census. The proportion of the area above the middle condition is increasing. (3) the average available phosphorus content is 50.86 mg / kg, which is obviously increased compared with the results of the second soil census, most of which are rich and abundant. (4) the average available potassium content was 119.6 mg / kg, which decreased obviously compared with the results of the second soil census. On this basis, the comprehensive situation of land nutrients in the study area was summarized, and a reasonable fertilization model of maize and rice was put forward in order to provide technical support for improving the soil nutrient level and grain yield in Tieling area.
【學位授予單位】:沈陽農(nóng)業(yè)大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:S158
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