【摘要】 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 -N含量的空间变异性同土壤含水率及含盐量的空间变异性作了一些对比更多还原

【Abstract】 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.更多还原