【摘要】 采用砂培实验方法,研究了不同水平氮锌配施对黑麦草生长和生理生化特性的影响,结果表明,无论是在低锌还是在足量供锌条件下,随施氮水平增加,黑麦草氮代谢和清除活性氧的能力、IAA和Gas含量增加,ABA和MDA含量下降,氮锌配施对生长和元素吸收均表现为协同效应。在判断氮锌复合作用类型时,应区分生长量变化引起的“浓缩效应”和“稀释效应”,单凭浓度变化不能确定氮锌复合作用的类型。应以生长量和吸收量变化来确定氮锌复合作用的类型。更多还原

【Abstract】 Sand culture experiment,biochemical determination and plant analysis were used to investigate the effects of combined N and Zn application on ryegrass growth,absorption and concentration of N and Zn in plant,as well as some mechanisms.The results showed that under both Zn deficient or at Zn sufficient condition,the content of IAA,GAs and SOD increased and the content of ABA and MDA decreased with the increased rate of N.There were synergism effects of combined N and Zn application on ryegrass growth and absorption of N and Zn.The condensation effect and dilution effect should be considered when determining the types of N and Zn compound effect.The changes in growth rate and absorption rate of N and Zn should be used to determine the types of N and Zn compound effect.更多还原