黄土丘陵区梯田谷子养分循环特征与生产力关系的研究

基金项目: “九五”中国科学院重大项目(KZ951-A1-301)、特别支持项目(KZ95T-04-01)和国家科技攻关项目(96-004-05-04)及中日合作研究项目共同资助

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

1.
Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100
2.
Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100

摘要: 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。
- 黄土丘陵区 /
- 梯田谷子 /
- 养分循环特征 /
- 生产力
Abstract: 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.
- Hilly loess plateau /
- Terrace millet /
- Nutrient cycling characteristics /
- Productivity