秸秆覆盖对附子氮代谢几种相关酶活性的影响

以江油附子主栽品种为材料,采用随机区组设计,研究了稻草覆盖方式(整草覆盖、切割与粉碎覆盖)和数量对附子硝酸还原酶(NR)、谷草转氨酶(ALT/GOT)和谷丙转氨酶(AST/GPT)等几种氮代谢相关酶活性的影响.结果表明:各覆盖处理的酶活性水平均高于对照组,即秸秆覆盖处理均有效益;不同的秸秆覆盖量间差异性显著,覆盖量为1 kg/m的处理酶活性水平高于覆盖量为0.5 kg/m2和1.5 kg/m2的处理;虽然切割覆盖的酶活性水平高于整草覆盖和粉碎覆盖,但不同覆盖处理间差异性并不显著;切割覆盖1 kg/m2处理的NR、GOT和GPT酶活性水平虽均为最高,但整草覆盖1 kg/m更能够达到较高经济效益的栽培效果;3种酶之间存在较好的正相关性,具有一定的协同作用.

Effect of Straw Comminution on Several Nitrogen Metabolism Enzymes of Aconitum carmichaeli Dexb.

With ’Jiangyou’cultivars as the test material,the effect of mode and quantity(covering the whole grass,cutting and grinding coverage)straw mulching on several Nitrogen metabolism enzymes,such as nitroreductase,glutamic-oxalacetic transaminase,glutamic-pyruvictransaminase of Aconitum carmichaeli Dexb.were studied.The results showed that the enzyme activity level of each cover processing were higher than those in the control group,namely straw mulching treatment all had benefits.Significantly differences between different straw mulching quantity,the enzyme activity level of mulching 1 kg/m2were higher than mulching 0.5 kg/m2and 1.5 kg/m2.Although the enzyme activity level of cutting coverage were higher than the whole grass coverage and crushing coverage,differences between different cover treatment was not significant.NR,GOT and GPT enzyme activity level of cutting mulching 1 kg/m2 were the highest,but the whole grass mulching 1 kg/m2 conld achieve higher economic benefit of cultivation effect.Among the three enzymes exists the good positive correlation,and had a certain synergy.