杉木第2代种子园不同地形土壤及植株养分比较

以杉木第2代种子园为研究对象,分析不同地形对种子园土壤及植株养分含量的影响.结果表明,随着坡位上升,杉木第2代种子园土壤及植株养分含量均呈逐渐下降趋势；同一坡位、同一土层深度,不同坡向杉木第2代种子园土壤及植株有效养分含量差异较大,总体而言,西坡有利于土壤有机质、有效磷及植株全氮、全镁及全铜的积累,东坡则有利于土壤速效钾及植株全钾、全钙及全锌的积累.

Comparative Analysis of Soils and Plant Nutrients of 2nd-Generation Seed Orchard of Cunninghamia lanceolata under Different Site Factors

The 2nd-generation seed orchard of Cunninghamia lanceolata was acted as research material,the effects of different sites on soil and leaves available nutrient contents were analyzed in this paper.The results showed that with the improvement of the slope position,soil and leaves available nutrient contents of the 2nd-generation seed orchard of Cunninghamia lanceolata were decreased;Different slope direction with the same slope position had big different complex effects on leaves and soil available nutrient content of the 2nd-generation seed orchard of Cunninghamia lanceolata;Generally,the west slope position had good to accumulation of soil organic matter,soil available P,leaves total N,leaves total Mg and leaves total Cu,and east slope position had good to accumulation of soil available K,leaves total Ca and leaves total Zn.