黄土丘陵区梯田谷子养分循环特征与生产力关系的研究

以新修梯田7年长期肥料定位试验为依据,研究了不同施肥条件下谷子各部位生物量、养分携出量、养分平衡以及耕层土壤养分时空变化。结果表明,有机肥与N、P肥配合施用可提高谷子的籽粒产量和生物产量。养分携出量的大小顺序为籽粒>叶>糠秕>茎,为同类地区农业生产及生态环境建设提供科学依据。

The 7-years long-term fertilization experiment was conducted on newly built terrace in Ansai Compre-hensive 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 ex-port 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 yi...