青海省耕层土壤养分含量相关性分析研究
2017-05-30武治华牛继平
武治华 牛继平
摘要[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/P2O5≥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/P2O5≥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。
关键词有机质;耕层土壤;土壤养分;相关性
中图分类号S158.3文献标识码A文章编号0517-6611(2017)23-0101-05
Correlation Analysis of Top Layer Soil Nutrient Content in Qinghai Province
WU Zhihua1, NIU Jiping2*
(1.Changdu Agrotechnology Extension Station,Changdu,Tibet 854000;2.Changdu City Agriculture and Animal Husbandry Bureau,Changdu ,Tibet 854000)
Abstract[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 relationships 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%,5408%;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
Key wordsOrganic matter;Top layer soil;Soil nutrient;Correlation
作者簡介武治华(1988—),女,内蒙古乌兰察布人,助理农艺师,从事农业技术推广工作。*通讯作者,农艺师,硕士,从事农业技术推广工作。
收稿日期2017-06-12
土壤的本质属性是土壤具有肥力,土壤又是绿色生命的源泉,是人类生存最基本、最重要、最珍贵的自然资源;它维系着自然界的生态平衡,使万物充满生机;它关系到人类的生存和社会的发展[1]。因此,土壤培肥和科学施肥,改善土壤物理化学性质,保持和提高土壤肥力,创造作物生长的最佳条件,切实维护养分平衡,对于合理规划和利用土地、促进农业生产的发展具有重要的意义。耕层土壤养分是植物生长需要的土壤营养元素,是维持植物生长的重要物质基础和生命元素,同时也是环境污染因子[2]。……
