杉木,马尾松,木荷纯林及其混交林的土壤养分状况

对中等立地上１５年生杉木、马尾松、木荷纯林及其混交林的土壤养分状况进行了研究。结果表明：土壤有机质、全氮、全钾、全钠、水解氮、速效钾、有效铜、有效锌、交换性锰含量为杉木＞马尾松＞木荷；土壤速效磷、全钙、全镁、有效铁含量为马尾松＞杉木＞木荷；而各林分土壤的ｐＨ值则无明显差异。合适的混交林可调节土壤大量营养元素及有效微量元素状况，改良土壤理化特性，促进林木丰产。

RESEARCH ON NUTRIENT STATUS OF PURE CHINESE FIR, MASSON PINE, SCHIMA SUPERBA AND MIXED FORESTS

The nutrient status of pure Chinese fir, masson pine, Schima superba and their mixed forests were studied The results showed that the contents of organic matter, total N, K, available N, K, Cu, Zn and Mn in the soil under the stand of Chinese fir were the highest Those in soil of Schima superba were the third The contents of available P, Fe and total Ca and Mg in soil of masson pine forest were the highest while those in soil of Schima superba forest were the lowest Their mixed forests regulated the contents of soil nutrient, and improved soil properties and tree growth