【摘要】 对安徽省土壤有效硼含量进行测定的结果表明:安徽省土壤有效硼含量平均为0.37±0.01ppm,有78.2%土壤缺有效硼(<0.50ppm),30.2%土壤极缺(<0.25ppm)。地区分布为:皖西山地<沿江平原<皖南山丘<江淮丘岗<淮北平原。主要土类的含量是砂姜黑土>潮土>棕壤>粗骨土>石灰岩土>黄棕壤、黄褐土>水稻土>紫色土、红壤。不同母质土壤有效硼含量是黄泛冲积物、黄土性古河湖相沉积物>碳酸盐岩风化物、湖积物>长江冲积物>下蜀黄土、河流冲积物>泥质页岩风化物>紫色岩风化物>第四纪红土、酸性岩风化物。耕作层土壤有效硼含量一般比心土层和底土层土壤高0.1—0.2ppm以上;土壤有效硼含量与pH多数呈正相关。更多还原

【Abstract】 The content of available B in soil of Anhui ranges from trace to 1.20 ppm with an average of 0.37+0.01 ppm.78.2% of the soil shows the content below critical value (0.50ppm ), 30% even lower than 0.25 ppm. The content tends to decrease from east to west and from north to south of the province, and the content also tends to decrease among soil types following the order: Shajiang dark soil, Cultivated meadow soil, Brown earth, Stony soil, Limestone soil, and Yellow -brown earth. About 92% of red earth shows B deficiency. Salinized and alkalized soils have the highest content of available B because of the salinization. The trend of B concentrated towards Plough layer is also observed: from very high in plough layers (>0.1—0.2 ppm) to obviously low in sublayers. The content was also found to increase as soil PH rose. The areas where the B fertilizer is urgently needed are determined in south of Huaihe River, and especially in the plains along Changjiang, as well as west and south Anhui. Care must be taken to possible and Potential B deficiency when growing rape and cotton.更多还原