CAJ | 학술논문

利用室内恒温培养试验,研究外源水溶性有机物(DOM)不同添加量对砖红壤土壤pH及土壤可溶性P的影响.结果表明:与不添加DOM比较,添加不同量DOM均可提高砖红壤土壤pH,且随着添加量的增加,pH呈现增加的趋势;随着培养时间的推移,添加5 mL DOM的处理pH先下降后趋于平衡,添加10 mL和20 mL DOM的处理pH在试验的24 h内没有较大幅度的变化,说明添加DOM在一定程度上可以提高砖红壤的pH.不同DOM添加量下土壤可溶性磷含量均显著提高,且随着添加量的增加而增加.在实验所研究的24 h内,不同DOM添加量的各处理可溶性磷含量均经历先快速下降,然后短暂回升,再慢速下降的过程.添加5 mL和10 mL DOM的处理,可溶性磷含量在试验结束时趋于稳定,而添加20 mL DOM的处理,仍呈缓慢下降的趋势.总体上讲,添加DOM在一定程度上提高了此类土壤可溶性磷含量;此外,加入DOM后,砖红壤的磷吸附量和吸附率都有大幅度的提高,随着DOM添加量的增加,磷吸附量增加.而吸附率反而随着DOM添加量的增加而有所降低.
이용실내항온배양시험,연구외원수용성유궤물(DOM)불동첨가량대전홍양토양pH급토양가용성P적영향.결과표명:여불첨가DOM비교,첨가불동량DOM균가제고전홍양토양pH,차수착첨가량적증가,pH정현증가적추세;수착배양시간적추이,첨가5 mL DOM적처리pH선하강후추우평형,첨가10 mL화20 mL DOM적처리pH재시험적24 h내몰유교대폭도적변화,설명첨가DOM재일정정도상가이제고전홍양적pH.불동DOM첨가량하토양가용성린함량균현저제고,차수착첨가량적증가이증가.재실험소연구적24 h내,불동DOM첨가량적각처리가용성린함량균경력선쾌속하강,연후단잠회승,재만속하강적과정.첨가5 mL화10 mL DOM적처리,가용성린함량재시험결속시추우은정,이첨가20 mL DOM적처리,잉정완만하강적추세.총체상강,첨가DOM재일정정도상제고료차류토양가용성린함량;차외,가입DOM후,전홍양적린흡부량화흡부솔도유대폭도적제고,수착DOM첨가량적증가,린흡부량증가.이흡부솔반이수착DOM첨가량적증가이유소강저.
In this study, a simulating incubation test was conducted to evaluate the effect of exogenous dissolved organic matter(DOM) on the pH and soluble P in latosol. Compared with the control,adding different amount of DOM increased the pH of latosol,and with increasing the quantity of DOM application, the soil pH had a increasing trend. Along with the incubation time, soli pH of the treatment with 5mL DOM added was first decreased and then closed to balance, and the treatments with 10mL and 20mL DOM added of no significantly change., which indicating that adding DOM could alleviate the‘acid poison’ in latosol. The extent of soil soluble phosphate in all DOM added treatments had a significantly improved, and improved with the increasing with the amount of DOM added. With increasing time of incubation, the content of soil soluble phosphate of the treatments with different DOM added was first fast falling and then experienced a little rebound and slowly declined at last. By the end of the incubation, the content of soil soluble phosphate of the treatments with 5mL and 10 mL DOM added closed to a stable, while the treatment with 20mL DOM added was still lowly declined. Generally speaking, adding DOM, in a certain extent, could improve the amount of soluble phosphate in latosol. In addition, adding DOM greatly improved the soil phosphorus adsorption and P-sorption efficiency. With the addition of DOM increased, phosphorus adsorption was increased and. P-sorption efficiency was reduced.