水曲柳与长白落叶松混交造林技术的研究

水曲柳与长白落叶松混交造林技术研究的结果表明,混交林中水曲柳的平均胸径、树高和单株材积分别为纯林的108.76%~123.71%、105.46%~114.59%和121.66%~161.26%;混交林中长白落叶松的平均胸径、树高和单株材积分别为纯林的127.78%~136.23%、104.07%~111.71%和179.8%~207.45%;双行混交的效果优于单行混交。混交林中长白落叶松24a生的单株平均材积为0.13007m3,为纯林单株材积的1.53倍。混交林的土壤养分含量较水曲柳和长白落叶松纯林平均提高了34.78%;减少了土壤容重,增加了土壤表层的孔隙度、持水量和通气度,改善了土壤的物理性状。

Planting technique of mixed forest by Fraxinus mandshurica and Larix olgensis

The research on planting technique of mixed forest by Fraxinus mandshurica and Larix olgensis showed that: The average values of mixed Fraxinus mandshurica in diameter, height and individual volume were 108.76% to 123.71%, 105.46% to 114.59 % and 121.66% to 161.26% that of the pure forest, separately; and the values of mixed Larix olgensis were 127.78% to 136.23%, 104.07% to 111.71% and 179.8% to 207.45% that of the pure forest. The mixed effect was two-row better than single-row. The individual average volume of mixed Larix olgensis at 24 a were 0.130 07 m3, 1.53 times that of the pure forest. Soil nutrient content of the mixed forest was raised 34.78% compared with their respective pure forests, and also made a reduction of soil bulk density, an increase of surface porosity, of water holding capacity and aeration, improvement of soil physical properties.