福建光泽杉木毛红椿混交林生长状况与土壤性质

Growth and Soil Properties of a Mixed Plantation of Chinese fir (Cunninghamia lanceolata) with Toona ciliata var.pubescens

在福建省光泽县杉木林采伐迹地上营造杉木纯林和杉木毛红椿混交林(混交比例3∶1)。造林后8年,对混交林和纯林的生长量和土壤肥力进行了比较研究。结果表明:杉木毛红椿混交林林分蓄积量为15.06m3/hm2,比杉木纯林大21.40%,差异达显著水平(P<0.05);杉木毛红椿混交林中的毛红椿和杉木的平均胸径、树高和单株材积生长量均大于纯林杉木。造林后8年杉木毛红椿混交林的表层(0～10cm)土壤有机质、全N、水解性N和有效P有所改善,而在杉木纯林中则下降。毛红椿是杉木较好的混交树种。

Pure Chinese fir （ Cunninghamia laneeolata ） plantation and mixed plantation of Chinese fir with Toona ciliata var. pubescens were established in the cutover area of a Chinese fir plantation in Guangze County, Fujian Province, China. Eight years after planting, growth and soil properties of both two types of plantations were studied. The results showed that stand volume of the mixed plantation was 15.06m3/hm2, 21.40% higher than that of the pure Chinese fir plantation, and the difference was significant （ P〈0.05 ） . Mean diameter at breast height （ DBH ） , tree height and single-tree volume of the T. ciliata vat. pubescens and Chinese fir in the mixed plantation were higher than those of the Chinese fir in the pure plantation. Soil organic matter, total N, hydrolyzable N and available P in 0 - 10em soil layers of the 8-year-old mixed plantation of Chinese for with T. eiliata vat. pubeseens were improved. T. eiliata var. pubeseens was a good tree species to mix with Chinese fir.