CAJ | 학술논문

对肃北高寒草甸不同载畜量下土壤酶活性与肥力因子的关系进行了研究.结果表明,不同载畜量下不同土壤深度草地土壤肥力不同.0～20 cm土壤水分、pH和有机质随载畜量增加而下降,土壤容重则随载畜量和土层深度增加而增加,放牧草地土壤均呈弱碱性;0～20 cm土壤全氮、速效氮、速效磷和速效钾含量均在高载畜量区达到峰值(P<0.01),其中全氮和速效钾在中载畜量区出现最低值; 0～20 cm土壤脲酶、过氧化氢酶和碱性磷酸酶活性均高区高于中区和低区,随土层的加深,过氧化氢酶和碱性磷酸酶活性呈逐渐降低的趋势,不同层次间显示出不同程度的差异性.相关分析和主成分分析表明,土壤过氧化氢酶和碱性磷酸酶间以及它们与土壤主要肥力因子间具一定相关性,说明土壤酶可以用来表征土壤肥力状况.
대숙북고한초전불동재축량하토양매활성여비력인자적관계진행료연구.결과표명,불동재축량하불동토양심도초지토양비력불동.0～20 cm토양수분、pH화유궤질수재축량증가이하강,토양용중칙수재축량화토층심도증가이증가,방목초지토양균정약감성;0～20 cm토양전담、속효담、속효린화속효갑함량균재고재축량구체도봉치(P<0.01),기중전담화속효갑재중재축량구출현최저치; 0～20 cm토양뇨매、과양화경매화감성린산매활성균고구고우중구화저구,수토층적가심,과양화경매화감성린산매활성정축점강저적추세,불동층차간현시출불동정도적차이성.상관분석화주성분분석표명,토양과양화경매화감성린산매간이급타문여토양주요비력인자간구일정상관성,설명토양매가이용래표정토양비력상황.
The soil enzymes and soil fertilities in alpine meadow under different carrying capacitty in Subei county of Gansu province were analyzed. The soil bulk density increased while the water, pH and organic matter declined with the increasing of carrying capacity, the soil was weak alkaline in grazing area; The content of total nitrogen, available nitrogen, available phosphorus and available potassium of soil in 0-20 cm depth get to the maximum in HC(P<0.01), while the content of total nitrogen and available potassium lie in minimum in MC; The same as four indexes above, the urease, catalase, alkaline phosphatase activity of soil in 0-20 cm depth increased with the increasing of carrying capacity; Correlation analysis showed they were in significantly positive correlation between the catalase, alkaline phosphatase activity, the three enzymes and the main soil fertilities, which showed the soil enzymes can be used to characterize the soil fertility status; Principal component analysis can get the same result: They have the good correlation between soil alkaline phosphatase and catalase activities and soil fertilities which can be used to indicate the status of grassland degradation and recovery.