为了探明不同的施肥方式和种植年限对延边水稻土壤速效养分的影响，采集了不同区域的土壤样品，测定了土壤pH值、碱解氮含量、速效磷含量、速效钾含量和有机质含量。研究结果表明，开垦年限影响了土壤0～20 cm耕层碱解氮的养分空间分布...为了探明不同的施肥方式和种植年限对延边水稻土壤速效养分的影响，采集了不同区域的土壤样品，测定了土壤pH值、碱解氮含量、速效磷含量、速效钾含量和有机质含量。研究结果表明，开垦年限影响了土壤0～20 cm耕层碱解氮的养分空间分布，开垦年限越长，碱解氮的空间异质性越弱，且随开垦年限增加，土壤碱解氮含量不断下降；稻田单施有机肥比单施化肥明显增加了土壤速效磷的含量，且导致下层速效磷含量增加；开垦年限和施肥方式对0～20 cm 耕层土壤速效钾的空间分布影响较小，但不同开垦年限对稻田土壤速效钾影响不同，开垦时间越长，土壤速效钾的含量越高；稻田施用有机肥有利于速效磷的积累。展开更多
In this study, the spatial and temporal distribution characteristics of dis- solved organic carbon （DOC） in water-logged paddy soil in Yanbian were investigat- ed under conditions of different fertilization types （...In this study, the spatial and temporal distribution characteristics of dis- solved organic carbon （DOC） in water-logged paddy soil in Yanbian were investigat- ed under conditions of different fertilization types （single application of chemical fer- tilizer, mixed application and chemical and organic fertilizers and single application of organic fertilizer） and cultivation years （80 years and 120 years）. The results showed that the spatial and temporal distribution of DOC in water-logged paddy soil changed significantly with time going by. The single application of chemical fertilizer or mixed application of chemical and organic fertilizers contributed to the release of DOC in top paddy soil under water-logging condition; the single application of organ- ic fertilizer promoted the accumulation of DOC in bottom paddy soil, resulting in great heterogeneity of DOC in the vertical space, but the single application of chem- ical fertilizer weakened the vertical spatial heterogeneity of soil DOC; the DOC con- tent in the 80-year-old water-logged paddy soil was higher and more stable than that in the 120-year-old soil.展开更多
文摘为了探明不同的施肥方式和种植年限对延边水稻土壤速效养分的影响，采集了不同区域的土壤样品，测定了土壤pH值、碱解氮含量、速效磷含量、速效钾含量和有机质含量。研究结果表明，开垦年限影响了土壤0～20 cm耕层碱解氮的养分空间分布，开垦年限越长，碱解氮的空间异质性越弱，且随开垦年限增加，土壤碱解氮含量不断下降；稻田单施有机肥比单施化肥明显增加了土壤速效磷的含量，且导致下层速效磷含量增加；开垦年限和施肥方式对0～20 cm 耕层土壤速效钾的空间分布影响较小，但不同开垦年限对稻田土壤速效钾影响不同，开垦时间越长，土壤速效钾的含量越高；稻田施用有机肥有利于速效磷的积累。
基金Supported by National Natural Science Foundation of China(31160103)Scientific and Technological Development Project of Yanbian University(YDKH[2011]32)Key Program of Department of Science and Technology of Jilin Province(20140204045SF)~~
文摘In this study, the spatial and temporal distribution characteristics of dis- solved organic carbon （DOC） in water-logged paddy soil in Yanbian were investigat- ed under conditions of different fertilization types （single application of chemical fer- tilizer, mixed application and chemical and organic fertilizers and single application of organic fertilizer） and cultivation years （80 years and 120 years）. The results showed that the spatial and temporal distribution of DOC in water-logged paddy soil changed significantly with time going by. The single application of chemical fertilizer or mixed application of chemical and organic fertilizers contributed to the release of DOC in top paddy soil under water-logging condition; the single application of organ- ic fertilizer promoted the accumulation of DOC in bottom paddy soil, resulting in great heterogeneity of DOC in the vertical space, but the single application of chem- ical fertilizer weakened the vertical spatial heterogeneity of soil DOC; the DOC con- tent in the 80-year-old water-logged paddy soil was higher and more stable than that in the 120-year-old soil.
