The relationship of soil nutrient cycling characteristics with productivity of terrace millet on hilly loess plateau

The 7-years long-term fertilization experiment was conducted on newly built terrace in Ansai Comprehensive Research Station of Soil and Water Conservation, Chinese Academy of Sciences, located in hilly-gully loess plateau. Under different fertilization treatments the bio-yield, nutrient-absorbed amount, nutrient import and export amount of millet, soil nutrient dynamic changes were discussed in this paper.The results showed that the compound organic manure with chemical fertilizer could increase grain yield and biomass of millet,and the sequence of nutrient-absorbed amount was grain＞leaf＞chaff＞stem.It provides scientific basis for farming production and eco-environment construction in this area.