The influence of earthworms (Lumbricidae) on the nitrogen dynamics in the soil litter system of a deciduous forest
The influence of earthworms (Lumbricidae) on the nitrogen dynamics in the soil litter system of a deciduous forest
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蚯蚓（蚓科）对落叶林土壤凋落物系统氮动态的影响
DOI：
10.1007/bf00379267
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发表时间：
1987
期刊：
影响因子：
2.7
通讯作者：
S. Scheu
中科院分区：
文献类型：
--
作者：
S. Scheu
在实验室和田间条件下研究了蚯蚓（Aporrectodea caliginosa（Savigny）和Lumbricus castaneus（Savigny））对土壤氮净矿化速率的影响。由摄食蚯蚓的基质的挖洞活动引起的氮的额外矿化。caliginosa（NL）直接相关的蚯蚓的生物量独立于他们的数量。温度升高导致NL值呈指数增加。该过程的Q_（10）值（2.18）远高于无蚯蚓的氮矿化过程的Q_（10）值（1.22）。在15°C时，A.计算出caliginosa约为250 μg N g ~（-1）鲜体wt d ~（-1）。利用实验确定的温度与NL值之间的指数关系，研究了由A.石灰岩上山毛榉的caliginosa为4.23 kg ha ~（-1）a ~（-1）。caliginosa为枯落物栖息种L.在4周的孵育期内，栗损失了大量的生物量（56%）。凋落物（老山毛榉叶凋落物、新落山毛榉叶凋落物和水曲柳叶凋落物）的添加对土壤氮净矿化和NL值均有显著影响。老山毛榉叶的存在导致这两个值的增加，而其他枯枝落叶类型则导致氮净矿化的减少。破碎化的灰凋落物对NL值（-69%）和氮净矿化（-74%）的影响最明显。
SummaryThe influence of earthworms (Aporrectodea caliginosa (Savigny) and Lumbricus castaneus (Savigny)) on the rate of nitrogen net mineralization of the soil was studied in the laboratory and in the field. The additional mineralization of nitrogen cause by the burrowing activity of the substrat feeding earthworm A. caliginosa (NL)was directly correlated to the biomass of the lumbricids independently of their number. A rise in temperature caused an exponential increase in NLvalues. The Q10 value of this process (2.18) was found to be much higher than that of the nitrogen mineralization without earthworms (Q10=1.22). At 15°C the NLvalue caused by A. caliginosa was calculated to be about 250 μg N g-1 fresh body wt d-1. Using the experimentally determined exponential relationship between temperature and NLvalues, the additional nitrogen mineralization caused by a population of A. caliginosa in a beechwood on limestone was calculated to be 4.23 kg ha-1 a-1.In contrast to A. caliginosa the litter dwelling species L. castaneus lost considerable amounts of biomass (56%) during the 4 week incubation period. Only 1/3 of the nitrogen equivalent to the weight loss of the animals was recovered in the mineral nitrogen pool.The addition of litter (old beech leaf litter, freshly fallen beech and ash leaf litter) had a pronounced effect on both nitrogen net mineralization and NLvalues of the soil. Presence of old beech leaves caused an increase in both values, wheres the other litter types effected a decrease in nitrogen net mineralization. Fragmented ash litter was found to have the most distinct effect on NLvalues (-69%) and nitrogen net mineralization (-74%).