摘要
从安徽各地13个土类、15种母质上采集耕层土样1006个,剖面土样394个,分析了有效性B、Mn、Cu、Zn、Fe、Mo6种元素的含量,结果表明:1、安徽省土壤微量元素缺乏频率约为B75%、Mo85%、Zn35%、Cu25%、Mn20%、Fe10%(仅占碱性土壤10%)。2、土壤pH与B呈极显著正相关;与Fe和交换Mn呈极显著负相关;与缓效Mn呈似抛物线相关;与Mo、Zn则无明显相关。3、各元素之间分布上也有一定相关性,其中Cu相关面最广,它除了与缓效Mn以外,与其他元素都有极显著正相关。4、聚类分析显示,在土壤形成和熟化过程中,Cu、Fe的有效化和移动性经常有相似的行为。
Six trace elements——B, Mn, Cu, Zn, Fe, and Me of 1006 samples from plough layer and 394 samples from profiles of 13 soil types were investigated. Results indicate that the deficient frequencies of these 6 elements are in order 78, 90, 35, 25, 20, and 10% for B, Me, Zn, Cu, Mn, and Fe in the soil.Soil pH is positively correlated with B and negatively with Fe and ex-Mn at very significant level. The pH is parabolically correlated to easily reducible Mn. No relationship is found between pH and Me or Zn.Positively correlations are commonly observed between Cu and other trace elements except easily reducible Mn.Cluster analysis reveals that in the process of soil formation and aging, Cu and Fe always show similar charactors of efficiency and moving.Reasonable application of trace elements as fertilizers is beneficial for soil deficient in concerned elements, and may bring in increments of 6 ×10~5 tons of grain, 10~5 tons of oil seeds, and 1.5×10~4 tons lint every year in case of Anhui Province.
