【摘要】 研究结果表明,盐城地区内不同自然、农业区(土壤类型)之间土壤平均有效硼含量存在显著的差异。据此,全地区可分为徐淮黄河冲积物黄潮土油菜缺硼区,里下河泻湖相沉积物水稻土油菜缺硼区及沿海冲积海积灰潮土棉花潜在缺硼区等三个区。区以下又可分为14个亚区。更多还原

【Abstract】 For the purpose of right use of boron, we analysed available boron contents of 410 soil samples taken from 5 state farms and most townships of 8 counties of Yancheng District and the suburb of Yancheng City. Analytical data showed, the soil available boron contents among the natural agriculture regions(soil groups)varied very greatly. Accordingly, we divided the whole district into three main regions, viz., Xu-Huai Yellow River deposit yellow-alluvial soil-rape seed boron defficient region, Li Xia River-lake deposit-paddy soil-rape seed boron defficient region and Sea Board river, and marine deposit grey alluvial soil-cotton boron latently defficient region. Under these three main regions, soils might be further divided into 14 subregions.更多还原