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对冀西北地区宣化县农田土壤养分状况进行了分析研究。结果表明:宣化县土壤pH值为7.98,有机质含量为17.56g/kg,土壤的全氮和水解性氮含量分别为0.98g/kg和37.77mg/kg,而土壤速效磷和速效钾的含量分别为22.57mg/kg和197.46mg/kg。和80年代农田土壤养分含量相比,土壤水解性氮含量略有下降。提高土壤有机质和氮含量是土壤肥力提高的前提基础,保证土壤中磷和钾的稳定供应对保持土壤肥力、保证作物高产也是十分必要的。
The soil nutrient status of farmland in Xuanhua County of northwestern Hebei Province was analyzed. The results showed that the soil pH value was 7.98, the content of organic matter was 17.56g / kg, the content of total nitrogen and hydrolyzable nitrogen in soil were 0.98g / kg and 37.77mg / kg respectively, while the content of available phosphorus and available potassium in soil were 22.57 mg / kg and 197.46 mg / kg. Compared with the soil nutrient content of farmland in the 1980s, soil hydrolyzable nitrogen content decreased slightly. Increasing soil organic matter and nitrogen content is the precondition for soil fertility enhancement. Ensuring a stable supply of phosphorus and potassium in the soil is also necessary to maintain soil fertility and ensure high crop yield.