Bouwman L A, Hoenderboom G H, van der Maas K J, de Ruiter P C
J Nematol. 1996 Mar;28(1):26-35.
In a series of microcosm experiments with an arable, sandy loam soil amended with sugarbeet leaf, the short-term (8 weeks) dynamics of numbers of nematodes were measured in untreated soil and in gamma-irradiated soil inoculated with either a field population of soil microorganisms and nematodes or a mixed population of laboratory-propagated bacterivorous nematode species. Sugarbeet leaf stimulated an increase in bacterivorous Rhabditidae, Cephalobidae, and a lab-cultivated Panagrolaimus sp. Differences were observed between the growth rates of the nematode population in untreated and gamma-irradiated soils, which were caused by two nematophagous fungi, Arthrobotrys oligospora and Dactylaria sp. These fungi lowered the increase in nematode numbers due to the organic enrichment in the untreated soil. We estimated the annually produced bacterivous nematodes to consume 50 kg carbon and 10 kg nitrogen per ha, per year, in the upper, plowed 25 cm of arable soil.
在一系列使用添加了甜菜叶的可耕地砂壤土进行的微观实验中，测定了未处理土壤以及接种了田间土壤微生物和线虫群体或实验室繁殖的食细菌线虫物种混合群体的γ射线辐照土壤中线虫数量的短期（8周）动态。甜菜叶刺激了食细菌的小杆科、头叶科以及实验室培养的类小杆属线虫数量的增加。在未处理土壤和γ射线辐照土壤中线虫群体的生长速率之间观察到差异，这是由两种捕食线虫的真菌——少孢节丛孢菌和指孢霉引起的。这些真菌降低了未处理土壤中由于有机富集导致的线虫数量增加。我们估计，在每年耕作的25厘米上层可耕地土壤中，每公顷每年产生的食细菌线虫消耗50千克碳和10千克氮。
