田间土壤NO_3^--N含量空间变异性初步研究

Preliminary Study on Spatial Variability of NO - 3 N Content in Soil

对具有代表性的 3个地块的土壤 NO- 3 -N含量实测资料进行了分析 ,结果表明田间土壤 NO- 3 -N含量存在明显的空间变异性。 3个地块的土壤 NO- 3 -N含量在置信水平β=0 .0 5下均服从正态分布。由实测资料进行的自相关及半方差分析表明 ,3个地块的土壤 NO- 3 -N含量自相关性不显著 ,且无规律性 ,因此在田间一般距离取样的土壤 NO- 3 -N含量可作为独立的随机变量。并将 NO- 3

Spatial variability of NO - 3 N content in soil was investigeted. Experiment results obtained from three typical plots indicated that spatial variability of NO - 3 N content in soil was notable. NO - 3 N contents in soil subordinated to normal distribution at β=0.05 confidence level. The results of self correlation and semivariance analysis showed that self correlation of soil NO - 3 N contents was not remarkable. So NO - 3 N content in soil can be treated as an independent random variance. In addition, the differences among soil NO - 3 N content, soil moisture and soil salinity content also are compared in this paper.