山东省土壤含铁状况及铁肥应用前景

全省5088个土样,有效铁平均含量为1.27～162.00ppm,平均为12.62ppm,<5ppm占5.41％;全省12个地(市)区土壤有效铁平均含量<10ppm有7个,>20ppm有2个;缺铁、潜在性缺铁土壤分别为510.7万亩和5299.9万亩;棕壤、水稻土为富铁土类,有效铁平均分别为20.9ppm和43.9ppm;褐土、潮土有效铁含量适中,平均分别为9.3ppm和11.3ppm;砂姜黑土含铁量较低,平均为7.5ppm;鲁西北泛滥平原为潜在性缺铁区;鲁中南中低山丘陵为部分潜在性缺铁区;鲁东低山丘陵为富铁区。

THE IRON STATE OF SOILS AND THE PROSPECT OF IRON FERTILIZER IN SHANDONG

5088 soil samples collected from 12 regions in Shandong province were analyzed. The results are summarized as follows: 1. The available Fe ranges from 1. 27ppm to 162. 00ppm,with an average of 12. 62ppm,and 5.41% of total samples contain lower than 5ppm. Among the 12 regions of the province,7 get <10ppm and 2 get>29 ppm in mean value of available Fe. 2. The contents of available Fe in brown earth and paddy soil are higher,with averages of 20. 9ppm and 43. 9ppm,resp. The contents in drab and fluvioaquic soils are medium, with averages of 9. 3ppm and 11. 3ppm,and in black Shajiang soli is lower,with an average of 7. 5ppm. 3. With available Fe,the flood piains in North and West Shandong are potential deficient,and the hilly regions in Middle-South Shandong are partially potential deficient,and the hilly regions in East Shandong are sufficient.