Effect of Cultivation on Spatial Distribution of Nematode Trophic Groups in Black Soil

LIANG WENJU; LI QI; JIANG YONG; CHEN WENBO; WEN DAZHONG

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Effect of Cultivation on Spatial Distribution of Nematode Trophic Groups in Black Soil

机译：耕作对黑土线虫营养组空间分布的影响

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Geostatistics combined with GIS was applied to assess the spatial distribution of nematode trophic groups following two contrasting soil uses in the black soil region of Northeast China. Two plots, one with fallow for 12 years and the other cultivated, were marked on regular square grids with 2-m spacing. Soil samples were collected from each sampling point, nematodes were extracted from these samples and classified into four trophic groups: bacterivores, fungivores, plant parasites, and omnivores/predators. The numbers of total nematodes and trophic groups analyzed had normal distributions on both fallow and cultivated plots. The absolute abundances of total nematodes and trophic groups were observed to be much more homogeneous on cultivated plot than on fallow one. Geostatistical analysis showed that the densities of total nematodes and trophic groups on both fallow and cultivated plots exhibited spatial dependence at the sampled scale and their experimental semivariograms were adjusted to a spherical or exponential model, except those of bacterivores and fungivores on cultivated plot. The spatial distribution of nematode trophic groups was found to be different for the two land uses, indicating that cultivation changed the native condition for soil nematode activities.

机译：在东北黑土地区两种对比土壤利用的基础上，将地统计学结合GIS评估了线虫营养类群的空间分布。在一块间隔2米的规则方格上标记了两个样地，一个样地休耕12年，另一个耕地耕地。从每个采样点收集土壤样品，从这些样品中提取线虫，并将其分为四个营养组：噬菌体，真菌，植物寄生虫和杂食动物/捕食者。在休耕地和耕地上，分析的总线虫和营养组的数量均呈正态分布。在休耕地上，总线虫和营养类群的绝对丰度比休耕地上的绝对丰度要均匀得多。地统计分析表明，休耕地和耕作地的总线虫和营养菌群的密度在抽样规模上均表现出空间依赖性，并且除耕地上的噬菌体和真菌外，它们的实验半变异函数已调整为球形或指数模型。发现两种土地利用的线虫营养组的空间分布不同，这表明耕作改变了土壤线虫活动的自然条件。

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来源
《土壤圈（英文版）》 |2003年第2期|97-102|共6页
作者
LIANG WENJU; LI QI; JIANG YONG; CHEN WENBO; WEN DAZHONG;
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作者单位

Shenyang Experimental Station of Ecology, Institute of Applied Ecology, the Chinese Academy of Sciences, Shenyang 110016 China;

Shenyang Experimental Station of Ecology, Institute of Applied Ecology, the Chinese Academy of Sciences, Shenyang 110016 China;

Shenyang Experimental Station of Ecology, Institute of Applied Ecology, the Chinese Academy of Sciences, Shenyang 110016 China;

Shenyang Experimental Station of Ecology, Institute of Applied Ecology, the Chinese Academy of Sciences, Shenyang 110016 China;

Shenyang Experimental Station of Ecology, Institute of Applied Ecology, the Chinese Academy of Sciences, Shenyang 110016 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类土壤学;
关键词
cultivation; GIS; soil nematode; spatial distribution; trophic group;

机译：栽培;GIS;土壤线虫;空间分布;营养族;

Effect of Cultivation on Spatial Distribution of Nematode Trophic Groups in Black Soil

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