杉木与马褂木混交效果分析

采用标准地调查、树干解析等方法对安溪白濑国有林场10年生的马褂木纯林及马褂木、杉木混交林(9杉1马、8杉2马、7杉3马)的树高、胸径、蓄积量等进行对比分析,结果表明:4种林分的树高、胸径、蓄积量间有显著或极显著差异;在相似的郁闭度下,林分蓄积量大小排序为7杉3马>8杉2马>9杉1马>马褂木纯林;不同混交比例对土壤肥力有较大影响,随着林分中马褂木树种数量增加,林地土壤的有机质含量、全N、水溶性N、速效P等土壤肥力指标显著提高。综合分析结果表明,7杉3马为杉木、马褂木混交的最佳比例。

Analysis on Effects of the Mix between Cunninghamia lanceolata and Liriodendron Chinese

The tree height,dbh,stocking of 10-years-old pure Liriodendron Chinese,and the mixed forests(10% of Liriodendron Chinese and 90% of Cunninghamia lanceolata,20% of L.Chinese and 80% of C.lanceolata、30% of L.Chinese and 70% of C.lanceolata)in Anxi Bailai National Forest Farm were compared and analysed by sample plot investigation and stem analysis methods.The results showed that: the differences of tree heights,dbh,stockings of above 4 stands were evident or extremely evident;When the shade densities were similar,the stand stockings were: 30% of L.Chinese and 70% of C.lanceolata >20% of L.Chinese and 80% of C.lanceolata>10% of L.Chinese and 90% of C.lanceolata>pure L.Chinese,different mixed proportions had big effect on the soil fertility.With increase of species number of L.Chinese of stands,the soil fertility indexes of organic matter content,whole N,water soluble N,rapid available P of forest soil increased evidently.Colligated analysis results showed 30% of L.Chinese and 70% of C.lanceolata was the best mix proportion.