| This research aims to study Panicum miliaceum L.leaves activity and the aging characteristics of oxygen metabolism by using Yu-Mi 3 and the pot method.The results showed that SOD,CAT,POD activities of different leaves rose and then declined with plant ageing,the content of active oxygen protective enzyme of flag leaf was high and declined slowly,and the content of MDA was low and rose gradually.These changes were significant in the middle and late stage of grain filling.The results showed,in the rain-fed agriculture,slowing leaves ageing is vital important to promote grain filling and increase jield and quallty of Panicum miliaceum L. |