CAJ | 학술논문

以茶园土壤为对象,通过室内模拟培养和田间改良试验,研究了茶园土壤pH对土壤中水溶态氟和交换态氟含量的影响.结果表明,在模拟培养下,当土壤pH由4.0降至3.5时,土壤水溶态氟含量迅速升高,当pH值在4.0~5.0之间时,水溶态氟含量较为稳定,之后随着土壤pH升高水溶态氟含量增加;交换态氟含量的变化趋势与之大致相反,且pH对20~40 cm土层土壤有效氟的影响比0~20 cm土层显著,对水溶态氟的影响比交换态显著,在强酸性土壤条件下对有效氟含量的影响比酸性条件下显著.田间试验结果与之基本一致,以pH 5.0为基点,随土壤pH值的上升或下降,两层土壤水溶态氟含量均增加,其中pH值降低对土壤水溶态氟的影响更大.
이다완토양위대상,통과실내모의배양화전간개량시험,연구료다완토양pH대토양중수용태불화교환태불함량적영향.결과표명,재모의배양하,당토양pH유4.0강지3.5시,토양수용태불함량신속승고,당pH치재4.0~5.0지간시,수용태불함량교위은정,지후수착토양pH승고수용태불함량증가;교환태불함량적변화추세여지대치상반,차pH대20~40 cm토층토양유효불적영향비0~20 cm토층현저,대수용태불적영향비교환태현저,재강산성토양조건하대유효불함량적영향비산성조건하현저.전간시험결과여지기본일치,이pH 5.0위기점,수토양pH치적상승혹하강,량층토양수용태불함량균증가,기중pH치강저대토양수용태불적영향경대.
Laboratory incubation tests and a field experiment were conducted to study the influence of soil pH on water soluble fluoride and exchangeable fluoride contents in tea garden soil. The results showed that the soil water soluble fluorine content increased obviously as soil pH value decreased from 4.0 to 3.5; it changed slightly at the ranging from pH 4.0 to pH 4.5, and then it increased with the raise of pH value. The change trend of soil exchangeable fluoride content was opposite. Soil pH had more influence on water soluble fluoride than on exchangeable fluoride, and the influence on available fluoride was more in 20-40 cm soil layer than in 0-20 cm soil layer, greater in strong acidic soil than in acidic soil. The field experiment also showed that pH 5.0 was the lowest point of soil water soluble fluoride content in the range of pH 4.5-6.0, and water soluble fluoride contents in two soil layers increased as soil pH value rose or fell from 5.0. Soil acidification could lead to water soluble fluoride content dramatic increasing.