本文对河南省108个县1160多个土壤样品进行了一万多样次分析,查明了河南省存在着大面积的缺钼、缺硼和缺锌土壤;揭示了微量元素Mo、B、Cu、Zn、Fe和Mn在各种类型土壤中的全量和有效态含量及其分布规律等。

Soil samples analyzed in this article were collected from over 1160 sites in 108 countie in-Henan Province.The average total contents of Zn, B, Mo, Cu and Mn are 94.95, 43.0, 0.68, 18.5, and 510.0-ppm respectively. The average available contents of Zn, B, Mo, Cu, Mn, and Fe are 0.5, 0.25r 0.05, 1.29, 17.8, and 20.78 ppm respectively. The available contents of Fe, Mn, and Cu of the surface soils in the north sub-tropical zone are usually higher than those of the surface soil in warm-temperate zone soil which have been found out for the first time in Henan Province.The available Zn content of the soil in Henan is low. Zn in the wind drift soil, solont-shok, saliniza soil and soloniz soil etc. is lower than critical index of the Zn content in soils, which are considered to be Zn deficient soils. It is necessary to apply Zn fertilizex to these soils.The available Mo contents of the soil in Henana are relatively low. The amounts of available Mo in the soil are usually different. The amount of available B in solontshok and saliniza soil is usually relatively rich. The amount of average available B in most of the soil is generally below 0.5 ppm which isc considered to be B deficient soils in Henan Province.It is necessary to apply B fertilizer to these soils.The amounts of available Fe, Mn and Cu are rich in most of the soil of Henan. But the amounts of available Fe, Mn and Cu in part of the soil in the northern regions of Henan arc-low. According to zonation of the chemical geographic environment of trace element in the soil, and to the need of crops, it is necessary to apply Fe and Mn fertilizer to these soil rationally.