Arid
DOI10.1006/jare.1999.0497
Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil
Alon, A; Steinberger, Y
通讯作者Steinberger, Y
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
出版年1999
卷号41期号:4页码:429-441
英文摘要

Nitrogen amendments (0, 25, 50 and 100 kg NH4NO3/ha) were used to study the responses of primary production, microbial biomass and nematode population in desert soil. The study was conducted in the Israeli Negev Desert, a region characterized by low and randomly distributed rainfall. Over a 1-year study period, nitrogen amendments resulted in a significant (p < 0.01) increase in soil microbial biomass. Soil microbial biomass also increased concomitantly with the increase in soil organic matter. The number of free-living nematodes in the soil increased with the increase in soil moisture, ranging from 43,000 individuals per square metre at the end of the summer to 351,000 individuals per square metre during the rainy season. No significant correlation was found between the nitrogen treatments and the nematode population, whereas a significant positive correlation was found between the nitrogen amendments and the above-ground biomass (r(2) = 0.94, p < 0.03). The nitrate proportion of the total soluble nitrogen in the soil also increased with the increase in soil moisture. This study provides baseline data for nitrogen amendments on soil microbial status, as well as insights into the importance of nitrogen in fertility in arid environments. (C) 1999 Academic Press.


英文关键词nitrogen amendments microbial biomass qCO(2) nematode population primary production
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000081318200006
WOS关键词SHRUB ZYGOPHYLLUM-DUMOSUM ; ABOVEGROUND BIOMASS ; MATURITY INDEX ; ORGANIC-MATTER ; ECOSYSTEM ; DYNAMICS ; DECOMPOSITION ; FERTILIZER ; PROFILE ; CANOPY
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/137562
作者单位(1)Bar Ilan Univ, Fac Life Sci, IL-52900 Ramat Gan, Israel
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Alon, A,Steinberger, Y. Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil[J],1999,41(4):429-441.
APA Alon, A,&Steinberger, Y.(1999).Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil.JOURNAL OF ARID ENVIRONMENTS,41(4),429-441.
MLA Alon, A,et al."Effect of nitrogen amendments on microbial biomass, above-ground biomass and nematode population in the Negev Desert soil".JOURNAL OF ARID ENVIRONMENTS 41.4(1999):429-441.
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