Abstract
In order to investigate the effects of different nitrogen fertilizer on soil environment and soil fertility in sunlight greenhouse, four different types of fertilizer was used in the same amount of nitrogen. The results showed that: (1) soil soluble salt content, EC value, and pH all increased with the advancing of production process. Different kinds of nitrogen fertilizer affected soil environment and soil fertility in the process; (2) the chemical fertilizer significantly improved soil soluble salt and EC value, calcium nitrate and urea significantly improved soil pH , and the deterioration of soil environment was accelerated. Whereas organic fertilizer or organic manure combine with urea slowed down the changes of soil soluble salt, EC, pH and the deterioration of soil environment; (3) the application of organic fertilizer, organic fertilizer and urea fertilizer significantly increased the contents of soil organic matter and base dissolving nitrogen, increased the contents of soil available P and K, and improved soil fertility. KEYWORD: Nitrogen fertilizer; Sunlight greenhouse; Soil environment; Soil fertility
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