This experiment aims to elaborate the influence of different organic manure applications on soil iron (Fe), copper (Cu), manganese (Mn) and zinc (Zn) contents in three successive seasons. Farmyard manure (FM...This experiment aims to elaborate the influence of different organic manure applications on soil iron (Fe), copper (Cu), manganese (Mn) and zinc (Zn) contents in three successive seasons. Farmyard manure (FM), chicken manure (CM) and blood meal (BM) and their mixtures and 1 control collectively 18 applications were tested under the open field conditions. All micro nutrients tended to increase with regard to the successive applications some of which were found to be statistically significant to a different extent. Considering the seasonal mean, an increase between the seasons in Fe, Cu and Mn contents were found to be statistically insignificant, whereas the Zn content was found to be statistically significant. CM gave rise to an augmentation in Cu, the Mn and Zn contents, BM also showed a tendency to increase in Fe contents of soils, but we recommend using BM only in small quantities due to the unfavorable features of the material. Summing up, 2.5 ton ha^-1 CM + 0.3 ton ha^-1 BM and 2.5 ton ha^-1 CM + 4.0 ton ha^-1 FM applications gave the better results.展开更多
文摘This experiment aims to elaborate the influence of different organic manure applications on soil iron (Fe), copper (Cu), manganese (Mn) and zinc (Zn) contents in three successive seasons. Farmyard manure (FM), chicken manure (CM) and blood meal (BM) and their mixtures and 1 control collectively 18 applications were tested under the open field conditions. All micro nutrients tended to increase with regard to the successive applications some of which were found to be statistically significant to a different extent. Considering the seasonal mean, an increase between the seasons in Fe, Cu and Mn contents were found to be statistically insignificant, whereas the Zn content was found to be statistically significant. CM gave rise to an augmentation in Cu, the Mn and Zn contents, BM also showed a tendency to increase in Fe contents of soils, but we recommend using BM only in small quantities due to the unfavorable features of the material. Summing up, 2.5 ton ha^-1 CM + 0.3 ton ha^-1 BM and 2.5 ton ha^-1 CM + 4.0 ton ha^-1 FM applications gave the better results.