Abstract

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Title:: Effect of Different Fertilization Mode on Soil Physical Properties,Agronomic Characters and Yield of Soybean in Slope Cropland

Author(s):: ?MENG Xiang-hai; ?Mudanjiang Branch of Heilongjiang Academy of Agricultural Sciences,Mudanjiang 157041,China

Keywords:: Slope cropland; Soil physical characteristics; Soybean; Agronomic characters; Yield

Abstract:: ?According to the phenomenon of serious soil nutrient loss,unreasonable fertilization and lower crop yield in hilly slope cropland,some measures including application of organicinorganic compound fertilizer(OICF),soil improvement granules(SIG) and film mulch(FM)were taken to design five fertilization modes to clarify the effect of the different fertilization mode on soil physical properties,agronomic characters and yield of soybean and to select the best fertilization mode.FM effectively reduced the fluctuations of the soil moisture.Soil moisture of non-FM plus OICF increased gradually from surface to bottom of arable layer and changes were relatively obvious at 0-15 cm.Soil moisture at 15-20 cm layer of OICF+SIG+FM was obviously higher other fertilization modes in the later growth stage of soybean.Compared with no fertilization control,pods per plant,seeds per plant and seeds weight per plant of each fertilization mode were increased,while flat pod rate and insect seed rate reduced significantly.Seed yield of OICF+SIG+FM significantly increased by 77.55%,43.52%,40.07% and 29.39%,respectively,compared with other fertilization modes.Therefore, applying organic inorganic compound fertilizer and soil improvement granules combined with film mulching could improve soil physical properties of hilly slope cropland effectively,and enhance soybean yield.