青海省耕层土壤养分含量相关性分析研究

目的]研究青海省贵德县耕层土壤的养分状况。方法]以青海省贵德县耕层土壤(0~20㎝)为研究对象,采用土壤农化常规方法,测定了土壤有机质、全氮、全磷、碱解氮、有效磷、速效钾、缓效钾等养分,分析了养分之间的相关性,耕层土壤养分相互关系的变化及变化的原因。结果]土壤有机质与全氮呈极显著正相关;土壤有机质与碱解氮呈极显著相关;全氮与碱解氮呈极显著相关;贵德县常牧镇、尕让乡的N/P_2O_5≥4的样本数分别为71、53,占总样本数的57.26%、54.08%;河西镇、拉瓦西镇的N/P_2O_5≥4的样本数相对较多,分别占总样本数的37.58%、48.00%,在这些乡镇应注意磷肥的施用,使氮磷平衡,发挥氮磷肥的协调作用。结论]该研究可为贵德县农业可持续发展提供参考。

Correlation Analysis of Top Layer Soil Nutrient Content in Qinghai Province

Objective] To study top layer soil nutrient content in Guide County of Qinghai Province.Method] Taking top layer soil (0-20cm ) in Guide County of Qinghai Province as the research object,using conventional method to determinate soil organic matter,total nitrogen,total phosphorus,available nitrogen,available phosphorus,available potassium,slowly available potassium and so on,analyzed the correlation among soil nutrients,nutrient relationship's change and change reason.Result] Soil organic matter and total nitrogen had a significant positive correlation;Soil organic matter and nitrogen was significantly related;Total nitrogen and available nitrogen was significantly related;N/P2O5 ≥4 of the samples number of Changmu Town,Garang Township of Guide County were 71,53,the total sample size of 57.3％,54.08 ％;N/P2O5 ≥4 of samples number of Hexi Town,Lawaxi Town were opposite bigger,respectively 37.58％,48.00％ of the total sample,in these towns application of phosphorus fertilizer should be paid attention to make the nitrogen phosphorus balance,and play the coordination function of N,P.Conclusion] The research can give reference for agricultural sustainable development