信阳地区农业用地土壤养分状况调查研究

Investigation and Evaluation on Soil Nutrient in Xinyang

[目的]对信阳不同利用形式农业用地土壤的养分进行分析测试研究。[方法]取耕作层土壤样品,测定土壤质地、pH、全量N、P、K含量和速效N、P、K含量。[结果]大部分土壤为壤质土,土壤pH均低于7.0,土壤呈偏酸性,有机质含量均低于20 g/kg,处于较低的水平。绿化带速效氮、磷、钾的平均含量分别为33.4、18.6、136.9 mg/kg;旱地土壤和稻田土壤速效氮平均含量分别为90.6和104.6 mg/kg,速效磷的平均含量46.5和42.3 mg/kg,速效钾平均含量90.6和104.8 mg/kg;茶园土壤速效氮、磷、钾平均含量分别为169.7、35.8、119.5mg/kg。[结论]可对信阳农业生产、土壤改良、合理施肥提供理论依据和实践指导。

[Objective] Soil nutrients was analysized in main Forms of land use in Xinyang, Henan province. [Method] Soil texture, pH, total N, P,K and Available N, P,K was tested in cropping layer.[Resuit] The results showed that most was I,oamy soil,pH〈7.0,acid. The content of organic matter 〈 20 g/kg. Available N, P,K was 33.4 mg/kg, 18.6 mg/kg, 136.9 mg/kg in Greenbehs soil respectively. Available N was 90.6 mg/kg and 104.6 mg/kg, Available t） was 46.5mg/kg and 42.3mg/kg,Soil Available K was 90.6 mg/kg and 104.8 mg/kg in arid land and paddy field . Soil Available N, P,K was 169.7mg/kg,35.8 mg/kg,119.5mg/kg in tea garden. [Conclusion] And the conclusion will provide theoretical basis and practice guidance for agricuhural production ,soil improvement and rational fertilization technique in Xinyang.