中文摘要：

为提高水曲柳林木的低耗高效生产力水平,将不同厚度落叶松凋落物浸提液添加到水曲柳林地中,研究了其对水曲柳林下暗棕壤中P、Fe、K、Ca、Al等养分有效性,及水曲柳幼苗吸收上述元素的影响。研究发现,落叶松凋落物浸提液提高了水曲柳林下土壤中P、Fe、K、Ca、Al等多种元素的速效量水平,增加了水曲柳幼苗根系和叶片中P、Fe、K、Ca含量,即促进水曲柳幼苗对几种元素的吸收,但降低了根系和叶片的含Al量。不同厚度凋落物对土壤和水曲柳幼苗不同组织中某种元素含量大小的影响程度,均为15 cm处理〉10cm处理〉5cm处理。

英文摘要：

In order to enhance productivity level of Fraxinus mandshurica,litters of Larix olgensis at different thickness were extracted and applied to F.mandshurica forests,and the effects of litter leachate on P,Fe,K,Ca and Al mobilization in dark brown forest soils and nutrient absorption of F.mandshurica seedlings were studied.The results showed that litter leachate of L.olgensis can increase the available contents of some mineral nutrients,including P,Fe,K,Ca and Al in soils,and increase the contents of P,K,Ca and Fe in roots and leaves of F.mandshurica seedlings.So it can contribute to the nutrient absorption of F.mandshurica seedlings.However,it decreased Al contents in roots and leaves.The effect trends of litter thickness on nutrient contents in soil and plant tissues were 15 cm10 cm5 cm.