CAJ | 학술논문

以内蒙古呼伦贝尔的克氏针茅( Stipa krylovii)典型草原作为研究对象，研究轻、中、重三种放牧强度对草地土壤养分和土壤酶活性的影响和相互作用，旨在为克氏针茅草原生态系统的保护、恢复及重建提供科学依据。结果表明：土壤养分含量显著降低(P<0.01)；随着放牧强度的增加，过氧化氢酶和蔗糖酶均显著降低(P<0.05)，而对脱氢酶和磷酸酶无显著差异(P>0.05)。相关分析表明，土壤酶活性与土壤养分含量密切相关，放牧干扰条件下土壤中有效磷与土壤脲酶、过氧化氢酶、蔗糖酶和磷酸酶粒脲酶活性呈显著相关(P<0.05)。
이내몽고호륜패이적극씨침모( Stipa krylovii)전형초원작위연구대상，연구경、중、중삼충방목강도대초지토양양분화토양매활성적영향화상호작용，지재위극씨침모초원생태계통적보호、회복급중건제공과학의거。결과표명：토양양분함량현저강저(P<0.01)；수착방목강도적증가，과양화경매화자당매균현저강저(P<0.05)，이대탈경매화린산매무현저차이(P>0.05)。상관분석표명，토양매활성여토양양분함량밀절상관，방목간우조건하토양중유효린여토양뇨매、과양화경매、자당매화린산매립뇨매활성정현저상관(P<0.05)。
Taking Stipa krylovii typical steppe in Hulunbuir of Inner Mongolia as test objects, the effects of different grazing intensities on soil enzyme activities and chemical properties were stud-ied, aiming to provide scientific basis for protection, restoration and reconstruction of Stipa kry-lovii. The results showed the soil nutrients reduced significantly (P<0. 01) along with the in-creasing of grazing intensity. The activities of soil catalase and sucrase enzymes all reduced sig-nificantly (P<0. 05)with the increasing of grazing intensity, but there was no significant differ-ence between soil phosphatase and dehydrogenase enzyme activities ( P>0 . 05 ) . The results of correlation analysis showed that soil enzyme activities was closely related to soil nutrient con-tents, and soil available phosphorus content and soil urease, catalase, sucrase and phosphatase activities in grazing disturbance conditions were significantly correlated ( P <0 . 05 ) .