Effects of fertilizer and Rhizobium inoculation on alfalfa growth on mine tailings and the physicochemical properties of iron tailings

doi:10.11686/cyxb2015121

Abstract

Abstract: This study was undertaken to determine the effects of fertilizer application (iron tailings and organic fertilizer) and Rhizobium inoculation with different strains on the growth of alfalfa planted in iron mine tailings and the physicochemical properties of the soil-plant system in outdoor pots. Rhizobium inoculation significantly increased height growth, root growth, above ground fresh weight, root fresh weight, total biomass and fresh nodule weight. The most effective Rhizobium was strain No.17676. Inoculated alfalfa also influenced the physicochemical properties of iron mine tailings, but the effect was not significant in the first year of the study. Fertilizer application markedly promoted alfalfa growth. Increasing fertilizer rates increased plant height, above ground fresh weight and total biomass. The N₂ fertilizer treatment produced the greatest increase in root nodule weight. Fertilizer application significantly reduced soil bulk density and pH but increased organic matter, available nitrogen, available phosphorus, and available potassium in the mine tailings soil. These effects were significantly higher for the N₃ treatment compared to lower fertilizer rates.

YANG He-Bao, LI Ji-Quan, WANG Jun-Juan, LI Yu-Ling. Effects of fertilizer and Rhizobium inoculation on alfalfa growth on mine tailings and the physicochemical properties of iron tailings[J]. Acta Prataculturae Sinica, 2016, 25(2): 68-76.

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