喀斯特地区植烟土壤有效硼含量分布及其影响因素—— 以湘西州烟区为例

采集湘西州488个植烟土壤样本，采用传统统计学和地统计学方法分析了湘西州植烟土壤有效硼含量分布及其影响因素。结果表明：①湘西州植烟土壤有效硼含量总体上略偏高，平均值为0.728 mg/kg，变幅在0.05?～?2.21 mg/kg，变异系数为53.46%，处于适宜范围内的样本占30.00%。②植烟土壤有效硼含量在空间分布上呈斑块状分布态势，永顺县的西部为一个低值区，东部为一个高值区。③蔬菜和油菜前茬的土壤有效硼含量相对较高；黄棕壤土壤的有效硼含量极显著地高于红灰土和红壤土类型。④有效硼含量有随海拔、pH、土壤有机质含量升高而升高的趋势。

Distribution of Available Boron Contents of Tobacco-growing Soil and Its Influencing Factors in Karst Region---A Case of Tobacco-growing Areas in Xiangxi

The available boron contents in tobacco growing soils and its influencing factors in Xiangxi were analyzed by collected 488 soil samples. The results were as follows: 1) available boron contents in the tobacco soils were slight higher for tobacco cultivation, it ranged from 0.05 to 2.21 mg/kg with a mean of 0.728 mg/kg and a variation coefficient of 53.46%, about 30.00% of the soil samples with available boron content were suitable for tobacco cultivation. 2) IDW interpolation map indicated that the spatial distributions of available boron were patchiness, while the high value area were in the eastern part of Yongshun and the low value area were in the western part of Yongshun. 3) The available boron contents of soils following vegetable and rape crop were higher than the other, and the average content of available boron in yellow-brown soil was higher than red lime soil and red soil. 4) The available boron contents was increased with the rise of altitude, pH and organic matter content in tobacco growing soil of Xiangxi.