SOIL-NITROGEN AVAILABILITY INFLUENCES SEASONAL CARBON ALLOCATION PATTERNS IN SUGAR MAPLE (ACER-SACCHARUM)

被引:43
作者
BURKE, MK [1 ]
RAYNAL, DJ [1 ]
MITCHELL, MJ [1 ]
机构
[1] SUNY SYRACUSE, COLL ENVIRONM SCI & FORESTRY, SYRACUSE, NY 13210 USA
关键词
D O I
10.1139/x92-059
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
The influence of soil N availability on growth, on seasonal C allocation patterns, and on sulfate-S content in sugar maple seedlings (Acer saccharum Marsh.) was tested experimentally. Relative to controls, the production of foliage doubled in response to high N availability, and the production of foliage, stems, coarse roots, and fine roots was halved in response to N deprivation. The period of foliage production was lengthened by fertilization and the period of fine root production was shortened by N deprivation compared with controls. In August, a shift in priority C allocation from foliage to roots occurred in the N-deprivation treatment. Therefore, during this month alone, the shoot to root ratio was greater in fertilized plants (1.0) than in N-deprived plants (0.5). Allocation to storage reserves was highest in N-deprived and lowest in fertilized plants (average 160 vs. 125 mg glucose/g biomass produced), and storage in roots of unfertilized plants commenced earlier (August) than in fertilized plants (after September). This resulted in unfertilized plants having higher fine root starch concentrations (5.2%) than fertilized plants (4.0%) in December, although sugar concentrations were similar (5.7%). The lengthened season of shoot growth and the low starch to sugar ratios in fine roots of fertilized plants are symptoms consistent with a higher risk of frost injury and microbial pathogen infection. Although soil N availability did not influence the sulfate-S content in foliage, N deprivation resulted in higher organic S to N ratios. This suggests that more S-containing proteins are produced when N availability is poor.
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页码:447 / 456
页数:10
相关论文
共 75 条
[1]   NITROGEN SATURATION IN NORTHERN FOREST ECOSYSTEMS [J].
ABER, JD ;
NADELHOFFER, KJ ;
STEUDLER, P ;
MELILLO, JM .
BIOSCIENCE, 1989, 39 (06) :378-386
[2]   Accumulation of starch in roots and foliage of loblolly pine (Pinus taeda L.): effects of season, site and fertilization [J].
Adams, M. B. ;
Allen, H. L. ;
Davey, C. B. .
TREE PHYSIOLOGY, 1986, 2 (1-3) :35-46
[3]   WHOLE-PLANT C-14 PHOTOSYNTHATE ALLOCATION IN PINUS-TAEDA - SEASONAL PATTERNS AT AMBIENT AND ELEVATED OZONE LEVELS [J].
ADAMS, MB ;
EDWARDS, NT ;
TAYLOR, GE ;
SKAGGS, BL .
CANADIAN JOURNAL OF FOREST RESEARCH, 1990, 20 (02) :152-158
[4]  
Anderson J. W., 1975, Sulphur in Australasian Agriculture (K.E. McLachlan, Editor), P87
[5]  
[Anonymous], 1979, PHYSL WOODY PLANTS
[6]   Site fertility affects seasonal carbon reserves in loblolly pine [J].
Birk, Elaine M. ;
Matson, Pamela A. .
TREE PHYSIOLOGY, 1986, 2 (1-3) :17-27
[7]   NITROGEN AVAILABILITY AND NITROGEN USE EFFICIENCY IN LOBLOLLY-PINE STANDS [J].
BIRK, EM ;
VITOUSEK, PM .
ECOLOGY, 1986, 67 (01) :69-79
[8]   RESOURCE LIMITATION IN PLANTS - AN ECONOMIC ANALOGY [J].
BLOOM, AJ ;
CHAPIN, FS ;
MOONEY, HA .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1985, 16 :363-392
[9]  
BURKE MK, 1988, THESIS STATE U NEW Y
[10]  
Cannell MGR, 1985, ATTRIBUTES TREES CRO, P160