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以重庆地区紫色土壤为对象,研究紫色土硼的有效性及主要影响因素.结果表明:供试土壤有效硼含量在0.076~1.60 mg/kg范围内,平均值为0.183 mg/kg,参照《土壤—植物营养学原理和施肥》进行评价发现,其中有87.16%的土壤样品有效硼含量很低,11.49%有效硼含量低,有99%的供试样品低于缺硼临界值.有机质、pH值、阳离子交换量(CEC)和母岩母质对其有效硼含量均有显著的影响.在pH≥6.5的范围内,有效硼随有机质含量增加而增加,但在pH<6.5的范围内却随有机质含量增加而减少,pH值的降低和CEC含量的增加,都会使有效硼含量随之增加,其中对硼有效性影响最大的因素是有机质.
Taking purple soil in Chongqing as an example, the effectiveness of boron in purple soil and the main influential factors were studied.The results showed that the available boron content in the soil was in the range of 0.076-1.60 mg / kg, the average was 0.183 mg / kg, - Phytotrophic principle and fertilization ", it was found that 87.16% of the soil samples had low effective boron content, 11.49% available boron content, and 99% of the tested samples were below the boron deficiency threshold. , Cation exchange capacity (CEC) and parent rock parent material had a significant effect on available boron content.In the range of pH≥6.5, available boron increased with the increase of organic matter content, but with pH <6.5, The decrease of pH, the decrease of pH value and the increase of CEC content will lead to the increase of available boron content. The most important factor affecting the availability of boron is organic matter.