CAJ | 학술논문

采用 Bremner 有机氮分级方法研究了30年施用不同肥料的长期定位试验耕层土壤有机氮组分变化特征。结果表明，与不施肥（CK）处理相比，长期施用不同肥料均提高了耕层土壤全氮和有机氮含量，所增加的有机氮中酸解性氮和非酸解性氮各占一半左右，其中增加的酸解性氮有69.0豫为未知态氮，21.0豫为氨基酸氮，6.6豫为氨基糖氮，3.4豫为氨态氮。与单施化肥（NPK）相比，牛粪/稻草与化肥配施能进一步提高土壤全氮和有机氮含量，但是不同种类的有机肥与化肥配施所增加有机氮的组分有明显差异；其中牛粪与化肥配施处理（NPKM）所增加的有机氮有60.0豫为酸解性氮，而稻草与化肥配施处理（NPKS）中所增加的有机氮有71.7豫为非酸解性氮。牛粪与化肥长期配施有利于提高土壤酸解性氮含量，而稻草与化肥配施则有利于提高非酸解性氮含量。
채용 Bremner 유궤담분급방법연구료30년시용불동비료적장기정위시험경층토양유궤담조분변화특정。결과표명，여불시비（CK）처리상비，장기시용불동비료균제고료경층토양전담화유궤담함량，소증가적유궤담중산해성담화비산해성담각점일반좌우，기중증가적산해성담유69.0예위미지태담，21.0예위안기산담，6.6예위안기당담，3.4예위안태담。여단시화비（NPK）상비，우분/도초여화비배시능진일보제고토양전담화유궤담함량，단시불동충류적유궤비여화비배시소증가유궤담적조분유명현차이；기중우분여화비배시처리（NPKM）소증가적유궤담유60.0예위산해성담，이도초여화비배시처리（NPKS）중소증가적유궤담유71.7예위비산해성담。우분여화비장기배시유리우제고토양산해성담함량，이도초여화비배시칙유리우제고비산해성담함량。
A better understanding of organic nitrogen(N)fractions in soils under long-term fertilization is critical to the regulation of N fer-tilizers and eco-environmental quality. In this study, a organic N fractionation method by Bremner was used to examine the characteristics of soil organic N fractions under long-term applications of different fertilizers. Compared to no fertilizer(CK)treatment, total N and organic-N in soils increased under long-term fertilization. About half of the increased organic-N was acid-hydrolysable N and the rest was non-acid hydrolysable N. Of the increased acid hydrolysable N, hydrolysable unidentified N, amino acid N, amino sugar N and ammonia N accounted for about 69.0%, 21.0%, 6.6%, and 3.4%, respectively. Total N and organic-N in the soils applied with organic fertilizers plus chemical fertilizers were higher than those with chemical fertilizer alone. However, organic-N fractions changed differently under different organic fer-tilizers. In the soils applied with cattle manure combined with chemical fertilizers(NPKM), about 60.0% of the increased organic-N was acid-hydrolysable N, while 71.7% was non-acid hydrolysable N in the soils with straw plus chemical fertilizers(NPKS). These results indi-cate that the composition of organic materials would have great impact on the fractions and availability of organic N in soils.