河北土壤钼的含量与分布

河北省土壤全钼含量平均为0.61ppm,低于全国平均值(1.7ppm和世界平均值(2.3ppm).土壤有效钼平均0.19ppm,全省68.6%的耕地土壤有效钼低于临界界缺乏值(0.15ppm),含有效钼0.16—0.20ppm的中钼耕地占8.6%,>0.20ppm的高钼耕地占22.8%.本文讨论了成土母质,土壤质地、有机质、碳酸钙、pH等对土壤钼含量消长及分布的影响.根据3982个土壤样品编制了河北土壤有效钼分布图.

Content and Distribution of Molybdenum in Soils of Hebei

The mean value of total Mo in soils of Hebei Province is 0.61ppm, lower than that of the whole country (1.7ppm)and that of the world(2. 3ppm). The average content of soil available Mo is 0. 19ppm. The soil available Mo in 68.6% cultivated land of Hebei is below the deficient critical value( 0.15ppm) . The cultivated land with a medium available Mo value( 0. 16 - 0. 20ppm) accounts for 8.6%, and that with a value above 0.20ppm accounts for 22.6%.The effects of soil parent material, texture, organic matter, CaCo3 , pH, etc. on the content, distribution and fluctuation of soil Mo are discussed in this paper. Based on the soil available Mo contents of 3982 soil samples, a distribution map of fhe soil avai. la'ble Mo in Hebei Province has been made.