CAJ | 학술논문

为了解地下水浅埋区重度盐碱地覆膜滴灌对土壤酶活性的影响,测定了重度盐碱地在滴灌利用过程中距离滴头不同水平位置(0～30 cm)和垂直深度(0～40 cm)的土壤碱性磷酸酶、脲酶和蔗糖酶活性,并对土壤酶活性的变化、空间分布特征及与土壤环境因子之间的相关关系进行分析.结果表明,覆膜滴灌促进了土壤酶活性的提高;水平与垂直方向滴头附近3种酶均易受覆膜滴灌作用影响,灌溉期间酶活性的增长与停灌期间酶活性降低均高于其他位置;土壤酶活性自滴头向四周径向减小,等值线呈椭圆形分布;相关分析表明盐碱土壤在覆膜滴灌种植2 a后,土壤酶活性与环境因子、土壤酶活性之间的相关性均得到提高.因此,将覆膜滴灌技术应用于盐碱地开发利用可以提高土壤酶活性,改善土壤环境,为作物根系提供良好的生长条件.
위료해지하수천매구중도염감지복막적관대토양매활성적영향,측정료중도염감지재적관이용과정중거리적두불동수평위치(0～30 cm)화수직심도(0～40 cm)적토양감성린산매、뇨매화자당매활성,병대토양매활성적변화、공간분포특정급여토양배경인자지간적상관관계진행분석.결과표명,복막적관촉진료토양매활성적제고;수평여수직방향적두부근3충매균역수복막적관작용영향,관개기간매활성적증장여정관기간매활성강저균고우기타위치;토양매활성자적두향사주경향감소,등치선정타원형분포;상관분석표명염감토양재복막적관충식2 a후,토양매활성여배경인자、토양매활성지간적상관성균득도제고.인차,장복막적관기술응용우염감지개발이용가이제고토양매활성,개선토양배경,위작물근계제공량호적생장조건.
In order to know the effects of mulch-drip irrigation on soil enzyme activities of saline-sodic soil with shallow water table, activities of alkaline phosphatase, urease, and invertase around the dripper, within 30 cm in horizontal direction and 40 cm in vertical direction from the dripper during the reclamation process, were investigated. Changes and distribution of soil enzyme activities, also their relationships with principal soil environment factors were studied. The results showed that activities of alkaline phosphatase, urease and invertase were promoted with time as the saline-sodic soil being reclaimed. Activities of the three enzymes around the dripper increased during the irrigation period and decreased as irrigation ceased in both horizontal and vertical directions. Furthermore, distributions of soil enzyme activities which decreased radially from the dripper in soil profiles were like ellipses. Correlation analysis showed that after two years of irrigation, relationships between soil enzyme activities and principal soil environment factors, also the relationship between soil enzymes, increased. Therefore, reclamation of saline-sodic soils by mulch-drip irrigation could promote soil enzyme activities, ameliorate soil environment and provide plants a good growth condition.