旱地果园土壤有机质对氮素含量的影响

旨在研究果园土壤有机质与土壤氮素养分的相关性与空间分布变化,为果园土壤的可持续利用提供依据。对庆阳苹果主产区30个果园土壤有机质含量和土壤氮素养分进行农化分析。结果表明：0~20 cm果园土壤有机质与全氮含量的相关关系为y=0.055x+0.140,相关系数R²=0.940,土壤有机质与碱解氮含量的相关关系为y=3.061x+26.65,相关系数R²=0.414,土壤全氮与碱解氮含量的相关关系为y=55.28x+18.83,相关系数R²=0.441;20~40 cm果园土壤的有机质与全氮含量的相关关系为y=0.045x+0.250,相关系数R²=0.721,土壤的有机质与土壤碱解氮含量的相关关系为y=2.237x+23.84,相关系数R²=0.158,土壤的全氮与碱解氮含量的相关关系为y=57.47x+5.141,相关系数R²=0.298。

Effects of Soil Organic Matter on Nitrogen Content in Dryland Orchard

The study aims to explore the correlation and spatial distribution of soil nutrients for the sustainable utilization of orchard soil. The chemical analysis was conducted to determine soil organic matter and nitrogen content in 30 main apple production areas in Qingyang. The results show that soil organic matter is significantly correlated with soil total nitrogen (y=0.055x+0.140, R²=0.940), while NaOH-hydrolyzed nitrogen is not obviously correlated with soil organic matter (y=3.061x+26.65, R²=0.414) and total nitrogen (y=55.28x+18.83, R²=0.441) in 0-20 cm soil. Soil organic matter is significantly correlated with soil total nitrogen (y=0.045x+0.250, R²=0.721), while NaOH-hydrolyzed nitrogen is not obviously correlated with soil organic matter (y=2.237x+23.84, R²=0.158) and total nitrogen (y=57.47x+5.141, R²=0.298) in 20-40 cm soil.