施肥量和种植密度对大豆牡丰7号保护性酶活性的影响

为了明确种植密度及施肥量对大豆保护性酶活性的影响,以牡丰7号为研究对象,采取裂区设计,施肥量为主区,种植密度为副区,研究了不同施肥量和种植密度下大豆不同时期超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的变化规律。结果表明:施肥量和种植密度对大豆牡丰7号不同时期叶片保护性酶活性有着较大的影响。从始花期到鼓粒期,3种保护性酶存在着先升后降的变化规律。随施肥量的增加,保护性酶活性的变化幅度增大,在一定范围内提高施肥量有利于增强牡丰7号抗逆性。随着种植密度增加SOD活性下降;CAT活性随种植密度的变化在不同时期表现出了不同的规律。POD活性与种植密度关系不大。

Effects of Fertilizer Application and Planting Density on Activity of Protective Enzymes of Soybean Variety Mufeng No.7

For the purpose to identify the effects of fertilizer application and planting density on soybean protective enzymes,soybean variety Mufeng No.7 was taken as material,the effects of fertilizer application and planting density on activity of SOD,POD and CAT of Mufeng No.7 were investigated in a split-plot experiment with fertilizer application to the main plot and planting densities to the subplot.The results showed that:the fertilizer application and planting density had great impact on activity of protective enzymes in the leaves of Mufeng No.7 at different stages.The activity of three kinds of protective enzymes first increased and then decreased from the flowering stage to the seed-filling stage.While the fertilizer application increased,the change range of activity of protective enzymes increased.Adverse resistance of Mufeng No.7 increased as the fertilizer application increased within a certain range.Activity of SOD decreased while planting density increased.Activity of CAT with the change of planting density in different stage showed different law.Activity of POD had little relation with planting density.