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本文比较分析了杉木根际土壤和非根际土壤的一些化学性质,并探讨了杉木连栽对这些性质和林木生长的影响。结果表明,杉木根际土壤的有机质、全氮、速效磷含量显著地高于非根际土壤,速效钾含量则相反。根际土壤的C/N较高,而pH则有降低的趋势。杉木连栽在不同程度上会降低根际和非根际土壤有机质、N,P,K含量和土壤pH,导致土壤养分状况和根际环境的恶化,从而使连栽杉木生长受阻。
In this paper, some chemical properties of Cunninghamia lanceolata rhizosphere soil and non-rhizosphere soil were comparatively analyzed, and the effects of continuous planting Cunninghamia lanceolata on these properties and tree growth were discussed. The results showed that the contents of organic matter, total nitrogen and available phosphorus in rhizosphere soil of Chinese fir were significantly higher than those in non-rhizosphere soil, and the content of available potassium was the opposite. Rhizosphere soil C / N is higher, while pH is a downward trend. Cunninghamia lanceolata plantation reduced the content of soil organic matter, N, P, K and soil pH in rhizosphere soil and non-rhizosphere soil to a certain extent, resulting in the deterioration of soil nutrient status and rhizosphere environment, which hindered the growth of continuous plantation fir.