The analysis of major soil nutrient variation characteristics is a crucial foundation for precise and scientific fertilization as well as soil improvement in tea gardens.Therefore,this study collected 18 soil samples from 18 tea gardens located in eight towns of Meitan County,Guizhou province,China.The pH value,organic matter content,total nitrogen content,alkali hydrolyzed nitrogen content,available phosphorus content,available potassium content,and the levels of medium and trace elements including Mg,Ca Cu Fe Mn Zn and Al were analyzed to investigate the interannual and seasonal changes in major nutrients within Meitan County's tea gardens.The results revealed significant decreases in the main nutrient contents of the soil during summer and autumn seasons;particularly notable was the decline in alkali hydrolyzed nitrogen levels.Moreover,over different years(2009-2022),The pH value of tea garden soil generally showed a downward trend and strongly acidic.Additionally,there were significant increases observed in nitrogen phosphorus potassium contents as well as trace element levels such as Fe Mn Al;conversely Mg Ca Cu contents exhibited significant decreases with severe deficiencies noted especially for Mg and Ca while no substantial changes were observed for Zn levels.
维普
万方数据