坡耕地不同保护性耕作措施对土壤酶活性的影响

以黑龙江省海伦市坡耕地长期保护性耕作为研究对象,探讨5种耕作方式:免耕、少耕、横坡垄、垄向区田(前4种视为保护性耕作)及常规翻耕对土壤过氧化氢酶活性、脲酶活性及蔗糖酶活性的影响.结果表明,免耕、少耕、横坡垄及垄向区田的过氧化氢酶活性高于常规翻耕1.70%~34.21%;免耕和少耕处理的脲酶活性及蔗糖酶活性高于其他耕作处理4.81%~67.94%;横坡垄和垄向区田处理的脲酶活性及蔗糖酶活性高于常规翻耕8.97%~36.00%;过氧化氢酶、脲酶及蔗糖酶活性均于大豆鼓粒期显示活性最高值.免耕和少耕相对于防治水土流失的横坡垄和垄向区田更能有效地培育黑土,是适于坡耕地的耕作方式

Effect of different conservational tillage of sloping land on the activity of soil enzyme

Based on the long-term conservational tillage experiment of sloping land of Heilongjiang Hailun City,the effect of five tillage treatments: no tillage,minimum tillage,cross ridge,ridge tillage(see as conservational tillage in former) and conventional plowing tillage on the activity of catalase,urease and sucrose were studied.Results showed that activity of catalase of no tillage,minimum tillage,cross ridge and ridge tillage was higher 1.70%-34.21% than that of plowing tillage;activity of urease and sucrose of no tillage and minimum tillage was higher 4.81%-67.94% than that of other tillage treatments;activity of urease and sucrose of cross ridge and ridge tillage was higher 8.97%-36.00% than that of plowing tillage;the highest activity of catalase,urease and sucrose was shown in podding period.No tillage and minimum tillage had more ability to fertilize black soil than cross ridge and ridge tillage,which could protect soil and water,thereby,no tillage and minimum tillage were fit for sloping land.