摘要
2007—2009年在隆德县13个乡镇采集土样3 950个,并对样品进行了测试、分析。结果表明,隆德县土壤养分现状为:有机质、全氮、碱解氮和速效钾含量高于宁夏平均含量,其含量分别为15.77 g/kg、1.03 g/kg、74.39 mg/kg和176.60mg/kg;有效磷含量22.29 mg/kg,低于全区平均含量。自1984年第二次土壤普查以来,土壤养分变化趋势为:有机质变化不明显,全氮、有效磷和速效钾含量呈增加趋势,碱解氮呈下降趋势;耕地土壤养分总体评价为土壤有机质、全氮、碱解氮、有效磷总体属于一般,速效钾总体属于高。
3 950 soil samples were collected in 13 townships in Longde county during 2007 to 2009 and testing and analysis were made on these samples. The result showed that the status of soil nutrient in Longde county was as follows： the con- tents of organic matter, total nitrogen, alkali-hydrolyzable nitrogen and rapidly-available potassium were higher than the average level of Ningxia, they were 15.77 g/kg, 1.03 g/kg, 74.39 mg/kg and 176.60 mg/kg respectively. The effective phosphorus content was 22.29 mg/kg, lower than the average level of Ningxia. Since the second soil census in 1984, the trend of change of the soil nutrient was： the organic matter did not changed significantly, the contents of total nitrogen, effective phosphorus and available potassium increased, the content of alkali-hydrolyzable nitrogen was on the decline The overall evaluation of the farmland soil nutrients is that the contents of the soil organic matter, total nitrogen, alkali-hydrolyzable nitrogen and available phosphorus are common as a whole and the content of rapidly-available potassium is high as a whole.
出处
《宁夏农林科技》
2013年第12期68-69,84,共3页
Journal of Ningxia Agriculture and Forestry Science and Technology
关键词
土壤养分
现状
变化及评价
隆德县
Soil nutrient
Status
Change and evaluation
Longde county
