Wolters Volkmar, Stickan Walter
Abteilung Ökologie, II. Zoologisches Institut der Universität Göttingen, Berliner Strasse 28, W-3400, Göttingen, Federal Republic of Germany.
Lehrstuhl für Geobotanik, Systematisch-Geobotanisches Institut der Universität Göttingen, Untere Karspüle 2, W-3400, Göttingen, Federal Republic of Germany.
Oecologia. 1991 Sep;88(1):125-131. doi: 10.1007/BF00328412.
The physiological activity and C and N allocation of beech seedlings planted in two different beech forest soils (acid brown earth, rendzina) were studied over 80 days. One adult earthworm Octolasion lacteum (Örley) was placed in half of the containers. Transpiration, CO, assimilation, chlorophyll synthesis and N incorporation were higher in the acid brown earth than in the rendzina. Fine root production was also higher in the acid brown earth. Production of stems and total N incorporation were higher in the O. lacteum treatments than in the controls. Burrowing activity of O. lacteum did not affect total root production but stimulated the transfer of C and N towards aboveground parts of the plants and shifted the large root to fine root ratio towards large roots. O. lacteum effects were similar in both soils. It is concluded that endogeic earthworms significantly affect resource allocation patterns of beech seedlings over a wide range of soils. This effect can be partly explained by an increased availability of N in soils worked by earth-worms.
在80天的时间里，研究了种植在两种不同的山毛榉林土壤（酸性棕壤、腐殖质土）中的山毛榉幼苗的生理活性以及碳和氮的分配情况。在一半的容器中放置了一条成年蚯蚓——乳突奥克托拉蚓（Octolasion lacteum (Örley)）。酸性棕壤中的蒸腾作用、二氧化碳同化作用、叶绿素合成和氮吸收均高于腐殖质土。酸性棕壤中的细根产量也更高。在有乳突奥克托拉蚓处理的情况下，茎的产量和总氮吸收量高于对照组。乳突奥克托拉蚓的挖掘活动并未影响总根产量，但促进了碳和氮向植物地上部分的转移，并使大根与细根的比例向大根方向转变。在两种土壤中，乳突奥克托拉蚓的影响相似。研究得出结论，内生蚯蚓在广泛的土壤类型中对山毛榉幼苗的资源分配模式有显著影响。这种影响部分可以通过蚯蚓翻动过的土壤中氮有效性的提高来解释。
