CAJ | 학술논문

坡耕地水土流失严重，选取大理市洱源县永乐小流域研究了坡改梯工程前后土壤养分及土壤肥力变化状况，并对不同土层土壤肥力的变化进行比较分析。结果表明，在0～90 cm的土层内，土壤有机质和土壤全氮、全磷养分及土壤肥力的垂直变化特征明显，均表现为上层＞中层＞下层。随着坡改梯工程的实施，坡改梯初期、后期土壤养分及土壤肥力质量整体均呈上升趋势，其中全氮含量在坡改梯前后增加的变化规律相当明显。通过对比坡改梯前后土壤综合肥力指数增加变化幅度分析，表明坡改梯初期、后期两次改造土壤肥力增加变化幅度分别达12．8％、18．7％。坡改梯的实施对土壤养分的改善有明显作用，土壤肥力质量有一定提高。
파경지수토류실엄중，선취대리시이원현영악소류역연구료파개제공정전후토양양분급토양비력변화상황，병대불동토층토양비력적변화진행비교분석。결과표명，재0～90 cm적토층내，토양유궤질화토양전담、전린양분급토양비력적수직변화특정명현，균표현위상층＞중층＞하층。수착파개제공정적실시，파개제초기、후기토양양분급토양비력질량정체균정상승추세，기중전담함량재파개제전후증가적변화규률상당명현。통과대비파개제전후토양종합비력지수증가변화폭도분석，표명파개제초기、후기량차개조토양비력증가변화폭도분별체12．8％、18．7％。파개제적실시대토양양분적개선유명현작용，토양비력질량유일정제고。
Soil and water loss on slope farmland was severe,this study researched the changing condition of soil nutrients and soil fertili-ty after slope changed into the terrace ,and compared soil fertility variation on different soil layer in Yongle basin in Eryuan County of Dali. The results showed that,it had obvious vertical variation characteristics of soil organic matter,soil fertility,soil total nitrogen and total phosphorus in the 0~90cm soil layer,it were upper>middle>lower. Soil nutrients and soil fertility quality were on the upward trend with the implementation of slope land terracing,the total nitrogen content increased quite obvious. By comparing the soil integrat-ed fertility index of cultivated sloping land before and after terracing,the results indicated that the early and late terracing stage is in-creased respectively 12. 8%,18. 7%. when slope land is rebuilded to terrace,there is a significant effect in the soil nutrient ,also the soil fertility quality is improved.