摘要
针对精准农业技术应用的日益普及,通过对一个地块土壤养分进行详细栅格采样分析,利用计算机插值的方法对土壤中各种营养元素和微量元素进行了分析。在采样栅格大小不同的条件下,随机选择5个采样点进行插值,分析了5个采样点在不同栅格采样条件下的插值结果。通过插值计算得到土壤中的全氮、速效氮和速效磷随着采样栅格的加大,插值点处的插值误差呈现出加大的趋势,但对于速效钾和其他的微量元素则呈现出与之不同的结论。
The technique of Precision Agriculture (PA) has widely been extended at present. Soil sampling by grids is a very important way for nutrient management in PA. The methods of computer based interpolation was used for analysis of soil nutrients and performanced at five randomly selected soil sampling points. Results were compared between interpolation and actual measurement by grids difference in scales. The interpolation errors of total nitrogen, plant available nitrogen, and plant available phosphorus increased with the size of sampling grids. But those of potassium and other micronutrients showed a reserve trend. The distribution of soil sampling points had a direct effect on interpolation results.
出处
《土壤学报》
CAS
CSCD
北大核心
2005年第2期199-205,共7页
Acta Pedologica Sinica
基金
国家高技术研究发展计划 (863 )项目 (2 0 0 3AA2 0 90 80 )
上海科技攻关项目 (0 3dz193 0 2 )资助
