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本文以如东县52个土壤剖面、104个土壤样本为材料,采用统计的方法,研究了影响石灰性土壤有效性锌和有效性铜的土壤因素。研究结果表明:土壤有效性锌与土壤有机质含量成显著的正相关,与小于2μ的土壤粘粒含量成显著的负相关;有效性铜与有机质呈正相关,达显著水平,与粘粒呈负相关,但相关性不显著。用二元回归的方法,百克表土(0-20cm)中每克有机质含有效铜平均为0.747Ppm、含有效锌平均为0.122ppm;用表土(0-20cm)减心土(20-40cm)中的含量差值计算,百克土壤中每克有机质含有效铜平均为0.853ppm,含有效锌平均为0.135ppm,有效铜含量分别是有效锌的6.12和6.32倍。二种方法所得的结果十分接近。
In this paper, soil samples of 52 soil profiles and 104 soil samples from Rudong County were used as statistical data to study the soil factors that affect the availability of zinc and availability of copper in calcareous soils. The results showed that there was a significant positive correlation between soil available Zn and soil organic matter content, and a significant negative correlation with soil clay content less than 2μ. Availability Cu was positively correlated with organic matter and reached a significant level, which was negatively correlated with clay , But the correlation is not significant. Using binary regression method, the content of available copper per gram of organic matter in 100 g topsoil (0-20 cm) was 0.747 Ppm on average and the effective zinc content was 0.122 ppm on average. Soil (20-40 cm) The average content of available copper per gram of organic matter in a hundred grams of soil is 0.853 ppm, the effective zinc content is 0.135 ppm on average, and the effective copper content is 6.12 and 6.32 times of that of available zinc, respectively. The results obtained by the two methods are very close.