on the contrary, when low nitrate concentration was applied to changnong 4, its nodule nitrogenase activity was inhibited and ureide content decreased in early growth period.
但生育前期低浓度硝酸盐对长农4号根瘤固氮酶活性有明显的抑制作用,酚脲含量减少。
if low nitrate concentration was applied to jilin 20, its nodule nitrogenase activity and ureide content were increased in early growth period, but were inhibited in later growth period.