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Title: Role of shrubs on redistribution of mineral nutrients in soil in the Mojave Desert

Abstract

Soil profiles underneath shrub clumps and bare desert pavement were examined at 62 study sites located in both open and closed drainage basins of the northern Mojave Desert. Highly significant differences occurred in the root zone underneath shrub clumps with higher concentrations of the following soil properties: electrical conductivity (EC25/sup 0/), Na, K/sup +/, Ca/sup + +/, Mg/sup + +/, Cl/sup -/, NO/sub 3//sup -/, and SO/sub 4//sup =/; exchangeable K/sup +/; cation exchange capacity; organic C and N; available P, and DTPA-extractable Fe and Mn. These differences reflect differential cycling caused by different plant species. The decomposition and mineralization of litter deposited underneath the perennial vegetation can account for these differences in soil properties which, collectively, increase the fertility of the soil underneath the vegetation canopy. Aboveground biomass of shrubs was measured and the nitrogen and mineral element composition of new photosynthetic tissue was determined. Estimates from a representative study site indicate that the reservoir of nitrogen and mineral nutrients in new leaf material of shrubs available for litter deposition could contribute 3.64 kg N, 0.31 kg P, 0.57 kg Na, 5.20 kg K, 4.95 kg Ca, 31.82 g Fe, and 4.30 g Mn per hectare. This source probablymore » represents about one-third of the total amount of nutrients involved in annual turnover for the study area during a normal production year. The remaining contribution would be supplied from the standing dead wood in shrubs and as litter from annual plant species.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of California, Los Angeles
OSTI Identifier:
6640636
Resource Type:
Journal Article
Journal Name:
Great Basin Nat.; (United States)
Additional Journal Information:
Journal Volume: 4
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; SHRUBS; MINERAL CYCLING; SOILS; CHEMICAL PROPERTIES; PHYSICAL PROPERTIES; BIOMASS; DESERTS; EXPERIMENTAL DATA; NEVADA TEST SITE; NUTRIENTS; ARID LANDS; DATA; ENERGY SOURCES; INFORMATION; NUMERICAL DATA; PLANTS; RENEWABLE ENERGY SOURCES; 510100* - Environment, Terrestrial- Basic Studies- (-1989)

Citation Formats

Romney, E M, Wallace, A, Kaaz, H, and Hale, V Q. Role of shrubs on redistribution of mineral nutrients in soil in the Mojave Desert. United States: N. p., 1980. Web.
Romney, E M, Wallace, A, Kaaz, H, & Hale, V Q. Role of shrubs on redistribution of mineral nutrients in soil in the Mojave Desert. United States.
Romney, E M, Wallace, A, Kaaz, H, and Hale, V Q. 1980. "Role of shrubs on redistribution of mineral nutrients in soil in the Mojave Desert". United States.
@article{osti_6640636,
title = {Role of shrubs on redistribution of mineral nutrients in soil in the Mojave Desert},
author = {Romney, E M and Wallace, A and Kaaz, H and Hale, V Q},
abstractNote = {Soil profiles underneath shrub clumps and bare desert pavement were examined at 62 study sites located in both open and closed drainage basins of the northern Mojave Desert. Highly significant differences occurred in the root zone underneath shrub clumps with higher concentrations of the following soil properties: electrical conductivity (EC25/sup 0/), Na, K/sup +/, Ca/sup + +/, Mg/sup + +/, Cl/sup -/, NO/sub 3//sup -/, and SO/sub 4//sup =/; exchangeable K/sup +/; cation exchange capacity; organic C and N; available P, and DTPA-extractable Fe and Mn. These differences reflect differential cycling caused by different plant species. The decomposition and mineralization of litter deposited underneath the perennial vegetation can account for these differences in soil properties which, collectively, increase the fertility of the soil underneath the vegetation canopy. Aboveground biomass of shrubs was measured and the nitrogen and mineral element composition of new photosynthetic tissue was determined. Estimates from a representative study site indicate that the reservoir of nitrogen and mineral nutrients in new leaf material of shrubs available for litter deposition could contribute 3.64 kg N, 0.31 kg P, 0.57 kg Na, 5.20 kg K, 4.95 kg Ca, 31.82 g Fe, and 4.30 g Mn per hectare. This source probably represents about one-third of the total amount of nutrients involved in annual turnover for the study area during a normal production year. The remaining contribution would be supplied from the standing dead wood in shrubs and as litter from annual plant species.},
doi = {},
url = {https://www.osti.gov/biblio/6640636}, journal = {Great Basin Nat.; (United States)},
number = ,
volume = 4,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1980},
month = {Tue Jan 01 00:00:00 EST 1980}
}