山东省粮田土壤有效硼分布及其与土壤肥力的关系

The Distribution of Cultivated Soil Available Boron and Its Relations with Soil Fertility in Shandong Province

为了了解山东省典型地貌的农业粮田土壤中有效硼的时空分布,探索土壤有效硼与土壤肥力其他指标间的相关关系,为合理施用硼肥提供依据,对山东省17地市小麦-玉米轮作方式的耕层土壤样品的有效硼分析。结果表明,山东省农田土壤有效硼平均含量0.749mg/kg,高于山东省土壤的平均水平;其变化范围为1.816～0.130mg/kg;不同土壤类型土壤有效硼含量高低依次为潮土>褐土>砂姜黑土>棕壤;山东省不同的地貌类型土壤有效硼含量以黄泛平原区最高,鲁东丘陵区含量最低,鲁中山地丘陵区含量中等;通过土壤有效硼与土壤肥力指标的相关和逐步回归分析表明,土壤全氮对土壤有效硼的直接影响力最大,且为正效应;其次为土壤有机质,为负效应。具体原因有待于进一步研究。

The aims were to understand the distribution of boron in the soil of agricultural grain of the typical landform of Shandong Province,and explore the correlation between soil boron and other soil fertility indicators provide the basis for the rational application of boron fertilizer.Top cultivated soils（0-20 cm） were collected from 17 cities（116 counties） in Shandong Province and analyzed for plant available boron（B）.The results showed that,the average content of cultivated soil available B in Shandong Province was 0.745 mg/kg with the range of 1.816-0.130 mg/kg.The decreased order of soil available B in different soil types was Fluvo-aquic Soil 〉 Cinnamon Soil 〉 Shajiang Black Soil 〉 Brown Soil.The landscape types also affected soil available B contents with Yellow River Flood Plain as the highest,East hills area as the lowest,and Hill Region in the middle.Statistical analysis（regression and correlation） indicated that,soil available B was affected positively by total nitrogen and negatively by soil organic matter.