Effects of fertilization on the growth, development and water use efficiency of spring millet

The effects of different fertilization levels on the growth, development and water use efficiency of spring millet were studied in semi-humid region. The results show that the height of individual, ears per hectare and 1000-grain weight of spring millet increase with the increase of fertilization amount within a certain range of fertilizer application. At the same time, fertilization induces the water amount in 2-meter soil layer decreasing, and its decreasing range is increasing with the fertilization amount increasing, and the water use efficiency of spring millet increases from 11.56% to 16.24%. When the amount of fertilization over a threshold value, the increasing of fertilizer results in the reduction of yield and water use efficiency of spring millet.