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通过室内培养实验,研究不同浓度的稀土元素Y胁迫对土壤p H值、有效P,速效K,碱解N及有机质等理化性质的影响。结果表明:在低浓度的情况下,Y对有效P的影响不明显,在高浓度下表现为抑制作用,起抑制作用的临界浓度为1000 mg·kg~(-1);当Y浓度大于500mg·kg~(-1)时,碱解N随土壤中Y含量的递增而显著升高,表现出明显的正相关性。对于土壤速效K,Y对其的作用表现为低浓度促进,高浓度抑制。此外,实验结果还表明土壤中Y含量与p H值和有机质有极显著的负相关性。最后,通过对土壤因子交互相关分析发现,土壤p H,有效P,碱解N和有机质之间有较强的相关性。
Effects of different concentrations of rare earth elements Y on the physico-chemical properties of soil pH, available P, available K, alkaline N and organic matter were studied by laboratory culture experiments. The results showed that, at low concentration, Y had no obvious effect on effective P, but showed inhibitory effect at high concentration. The critical concentration of inhibition was 1000 mg · kg -1. When Y concentration was over 500 mg · Kg ~ (-1), the alkaline solution N significantly increased with the increasing of Y content in soil, showing a significant positive correlation. For soil available K, Y effect on the performance of its low concentration to promote the high concentration of inhibition. In addition, the experimental results also showed that soil Y content and p H value and organic matter has a very significant negative correlation. Finally, through correlation analysis of soil factors, it was found that soil p H, available P, alkaline hydrolysis N and organic matter had a strong correlation.