马尾松苦槠混交林生长状况与土壤肥力分析

对福建省光泽县杉木人工林采伐迹地上营造的7 a生马尾松纯林和马尾松苦槠混交林(混交比例1∶1)的生长量和土壤肥力进行研究。研究结果表明:在下坡位,混交林的林分生长量大于马尾松纯林,蓄积量为30.33 m3·hm-2,比马尾松纯林增加17.47%;在中坡位,混交林的蓄积量略高于马尾松纯林;在上坡位,混交林的生长量小于马尾松纯林,林分蓄积量为11.89 m3·hm-2,仅为马尾松纯林的76.02%。混交林和纯林蓄积量、表层(0-10 cm)土壤有机质和全氮等指标均随着坡位的下降而增加。马尾松苦槠混交林的表层(0-10 cm)土壤有机质、全N等指标在下坡和中坡位均略高于马尾松纯林,在上坡位则略低马尾松纯林。

Analysis on growth and soil fertility of a mixed plantation of Pinus massoniana and Castanopsis sclerophylla

Growth and soil fertility of a 7-year-old pure Pinus massoniana plantation and a mixed plantation of P. massoniana and Castanopsis sclerophylla established in the cutover area of a Chinese fir plantation in Guangze County, Fujian Province, China, were investigated.The results show that, On the lower slope, tree growth in the mixed plantation was greater than in the pure plantation, and the growing stock was 30.33 m3.hm-2, 17.47% higher than in the pure plantation. On the middle slope, tree growth in the mixed plantation was slightly greater than in the pure plantation. On the upper slope, tree growth in the mixed plantation was lower than in the pure plantation, and the growing stock was 11.89 m3.hm-2, only equivalent to76.02% of the pure plantation. Growing stock, surface （0-10 cm） soil organic matter and total N concentrations in both of the plantations increased down slope. Surface （0-10 cm） soil organic matter and total N were slightly higher in the mixed plantation than in the pure plantation on the lower and middle slopes, but were slightly lower than in the pure plantation on the upper slope.