中文摘要：

长期定位试验和ICP-AES测试相结合,研究了下辽河平原土壤有效Mn和Zn浓度变化以及不同施肥制度下大豆体内Mn和Zn浓度与含量的变化。结果表明：下辽河平原土壤有效Zn浓度已濒临临界值,应加强对其监测;大豆籽实和秸秆体内Zn浓度受施肥影响变化较小;而籽实中Mn浓度受施肥影响变化较大,且NPK和NPKO处理显著高于O和CK处理;养分循环再利用在增加大豆生物量的同时,Mn和Zn携出亦呈增加趋势;土壤-作物系统中,Mn和Zn均出现收支赤字,其赤字大小顺序为NPKO

英文摘要：

The concentration and distribution of Mn and Zn in soil and soybean in lower reach of Liaohe River Plain were investigated with ICP-AES analysis.The results showed that the available Zn in soils was close to the critical value and the monitoring should be strengthened.Zn concentration in seed and stalk,coupled with Mn in stalk,was not affected by fertilization types,while Mn concentration in seed under NPK and NPKO treatments was significantly higher than that with O and CK treatments.Application of organic and inorganic fertilizer increased crop biomass,and consequently increased Mn and Zn storage in soybean.In soil-crop system,Mn and Zn under different fertilization regimes showed budget deficit,with the deficit order of NPKOOCKNPK,indicating that nutrient cycling could decrease the deficit significantly and keep the ecological systems more sustainable.