宜君县核桃经济林地土壤养分调查与评价  

Investigation and evaluation of soil nutrients of walnut nonwood forestland in Yijun County

作　　者：赵映翠 耿增超[1] 陈金海 林云[1] 

机构地区：[1]西北农林科技大学资源环境学院,农业部西北植物营养与农业环境重点实验室,陕西杨凌712100 [2]宜君县核桃办公室,陕西宜君727200

出　　处：《干旱地区农业研究》2015年第3期85-89,189,共6页Agricultural Research in the Arid Areas

基　　金：陕西省自然科学基础研究计划项目(2010JM5004)

摘　　要：采集宜君县10个乡镇典型代表村0～25 cm层次土样,分别测定土壤pH值、有机质、全氮、全磷、全钾、碱解氮、速效磷、速效钾等指标,并采用改进的内梅罗指数法对各个乡镇的土壤养分进行调查与评价。结果表明：宜君县各个乡镇土壤综合肥力水平整体一般,其中,五里镇、雷塬乡、城关镇、西村乡、彭镇、棋盘镇、云梦乡、太安镇和哭泉乡土壤肥力系数为0.91～1.19（0.9～1.8）,属于一般肥力水平;尧生乡土壤肥力系数仅为0.89（〈0.9）,土壤肥力属于贫瘠水平。全氮和速效磷是此地区的主要限制因子。总体来看,宜君县土壤养分含量处于中低水平,且存在碱解氮和速效钾含量分布不均匀,全氮、全磷和速效磷含量偏低、pH值偏高等问题,因此土壤的培肥空间比较大。The soil samples in 0~25 cm layers were collected ,and pH value ,organic matter content ,total N ,total P ,total K ,alkali-hydrolysable N content ,available P content ,and available K content were measured ,this study were conducted to investigate and evaluate the nutrients of soil of 10 towns of Yijun County using the improved Nemerow index method .As a whole ,the soil fertility of each village and town was moderate in Yijun County .Wuli town ,Leiyuan town , Chengguan town ,Xicun town ,Peng town ,Qipan town ,Yunmeng town ,Taian town and Kuquan town had a soil fertility coefficients between 0 .91~1 .19 （0 .9~1 .8 ） ,indicating a moderate fertility level .However ,the poor soil fertility level of Yaosheng town was reflected by the soil fertility coefficient of 0 .89 （〈0 .9 ） .The main limiting factors in this region were total N and available P .In summary ,problems facing Yijun County in terms of soils are low level of nutrient con-tent ,uneven distribution of alkali-hydrolysable N and available K ,inadequate amount of total N ,total P and available P ,and high pH value ,implying a larger space of the improvement of soil fertility .

关 键 词：核桃经济林地 土壤养分 内梅罗指数 土壤肥力综合评价 宜君县 

分 类 号：S664.1[农业科学—果树学]