Arid
DOI10.1007/s11104-006-9014-6
Effects of water additions, chemical amendments, and plants on in situ measures of nutrient bioavailability in calcareous soils of southeastern Utah, USA
Miller, Mark E.; Belnap, Jayne; Beatty, Susan W.; Webb, Bruce L.
通讯作者Miller, Mark E.
来源期刊PLANT AND SOIL
ISSN0032-079X
出版年2006
卷号288期号:1-2页码:19-29
英文摘要

We used ion-exchange resin bags to investigate effects of water additions, chemical amendments, and plant presence on in situ measures of nutrient bioavailability in conjunction with a study examining soil controls of ecosystem invasion by the exotic annual grass Bromus tectorum L. At five dryland sites in southeastern Utah, USA, resin bags were buried in experimental plots randomly assigned to combinations of two watering treatments (wet and dry), four chemical-amendment treatments (KCl, MgO, CaO, and no amendment), and four plant treatments (B. tectorum alone, the perennial bunchgrass Stipa hymenoides R. & S. alone, B. tectorum and S. hymenoides together, and no plants). Resin bags were initially buried in September 1997; replaced in January, April, and June 1998; and removed at the end of the study in October 1998. When averaged across watering treatments, plots receiving KCl applications had lower resin-bag NO3- than plots receiving no chemical amendments during three of four measurement periods-probably due to NO3- displacement from resin bags by Cl- ions. During the January-April period, KCl application in wet plots (but not dry plots) decreased resin-bag NH4+ and increased resin-bag NO3-. This interaction effect likely resulted from displacement of NH4+ from resins by K+ ions, followed by nitrification and enhanced NO3- capture by resin bags. In plots not receiving KCl applications, resin-bag NH4+ was higher in wet plots than in dry plots during the same period. During the January-April period, resin-bag measures for carbonate-related ions HPO42-, Ca2+, and Mn2+ tended to be greater in the presence of B. tectorum than in the absence of B. tectorum. This trend was evident only in wet plots where B. tectorum densities were much higher than in dry plots. We attribute this pattern to the mobilization of carbonate-associated ions by root exudates of B. tectorum. These findings indicate the importance of considering potential indirect effects of soil amendments performed in conjunction with resource-limitation studies, and they suggest the need for further research concerning nutrient acquisition mechanisms of B. tectorum.


英文关键词Bromus tectorum ion-exchange resin bags nutrient dynamics phosphorus potassium Stipa hymenoides
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000243001400002
WOS关键词EXCHANGE RESIN BAGS ; NITROGEN LIMITATION ; DESERT ; PRECIPITATION ; AVAILABILITY ; ECOSYSTEM
WOS类目Agronomy ; Plant Sciences ; Soil Science
WOS研究方向Agriculture ; Plant Sciences
来源机构United States Geological Survey
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/152774
作者单位(1)US Geol Survey, SW Biol Sci Ctr, Kanab, UT 84741 USA;(2)US Geol Survey, SW Biol Sci Ctr, Moab, UT 84532 USA;(3)Univ Colorado, Dept Geog, Boulder, CO 80309 USA;(4)Brigham Young Univ, Dept Plant & Anim Sci, Provo, UT 84602 USA
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GB/T 7714
Miller, Mark E.,Belnap, Jayne,Beatty, Susan W.,et al. Effects of water additions, chemical amendments, and plants on in situ measures of nutrient bioavailability in calcareous soils of southeastern Utah, USA[J]. United States Geological Survey,2006,288(1-2):19-29.
APA Miller, Mark E.,Belnap, Jayne,Beatty, Susan W.,&Webb, Bruce L..(2006).Effects of water additions, chemical amendments, and plants on in situ measures of nutrient bioavailability in calcareous soils of southeastern Utah, USA.PLANT AND SOIL,288(1-2),19-29.
MLA Miller, Mark E.,et al."Effects of water additions, chemical amendments, and plants on in situ measures of nutrient bioavailability in calcareous soils of southeastern Utah, USA".PLANT AND SOIL 288.1-2(2006):19-29.
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