The highest returns are received from the highest level of fertilization. 最高的施肥水平可獲最高的經(jīng)濟效益。
Fertilization which was related to fertilization amount and different growth stages improved photosynthetic rate of leaves. 增施肥料提高了葉片光合速率,并且它與施肥水平和生育階段有關(guān)。