拉西瓦片区土地整理中新增地土壤养分现状研究

Soil nutrition of newly increased farmland in land arrangement of Laxiwa area

为研究青海省拉西瓦片区土地整理项目中新增地土壤养分含量的特征,针对台地、滩地、坡地、丘陵4种地貌采集了拟新增耕地的160个土壤样品,测定其有机质、全氮、全磷、全钾、碱解氮、速效磷、速效钾和酸碱度,对该区土壤养分状况进行了分析比较。结果表明:拉西瓦片区新增耕地土壤呈微碱性,有机质、全氮、全磷、全钾、碱解氮、速效磷和速效钾平均含量分别为10.07 g/kg、0.95 g/kg、1.30 g/kg、25.21 g/kg、54 mg/kg、6.15 mg/kg和107 mg/kg。除全钾无差异,其他土地养分变化较大,不同地貌类型间土壤养分差异明显。有机质、碱解氮、速效磷含量普遍严重不足,速效钾含量丰富。

To investigate the soil nutrition of newly increased farmland in land arrangement of Laxiwa area,160 soil samples from tableland,bottomland,sloping field and hills were taken to measure organic matter,total nitrogen,total phosphors,total potassium,available nitrogen,available phosphors,available potassium and pH,Analysis were done to compare soil nutrition of different landforms.Soil in the newly increased land exhibits week alkaline and mean content of organic matter,total nitrogen,total phosphors,total potassium,available nitrogen,available phosphors,available potassium is 10.07 g/kg,0.95 g/kg,1.30 g/kg,25.21 g/kg,54 mg/kg,6.15 mg/kg and 107 mg/kg,respectively.There are significant nutrition differences among landforms except potassium.Organic matter,available nitrogen and available phosphors are poor and available potassium is rich.