KINETIC RESPONSES OF PSEUDOROEGNERIA ROOTS TO LOCALIZED SOIL ENRICHMENT

被引:56
作者
JACKSON, RB [1 ]
CALDWELL, MM [1 ]
机构
[1] UTAH STATE UNIV,CTR ECOL,LOGAN,UT 84322
关键词
AGROPYRON-SPICATUM; AMMONIUM; KINETICS; METHYLAMMONIUM; NUTRIENT UPTAKE; PHOSPHATE; POTASSIUM; PSEUDOROEGNERIA-SPICATA; ROOTS; RUBIDIUM; SOIL MICROSITES;
D O I
10.1007/BF00012250
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Soil patches on opposite sides of Pseudoroegneria spicata plants in the field were treated with either distilled water or a nutrient solution containing N, P, or K. Roots from these enriched and control patches were tested three days later for their capacities of ammonium, phosphate, and potassium uptake. When phosphate was augmented in the enriched patches, rates of phosphate uptake increased significantly, but not rates of ammonium or potassium uptake. When the enriched patches were augmented with nitrogen, uptake capacities of both ammonium and potassium increased significantly (mean increases of up to 88% and 71% for ammonium and potassium, respectively). Potassium augmentation did not lead to increased soil-available K and, correspondingly, did not induce changes in the capacity for uptake of K, N, or P. The potential importance of nutrient uptake kinetics in the exploitation of nutrient-rich soil patches is discussed.
引用
收藏
页码:231 / 238
页数:8
相关论文
共 47 条
[1]  
ALLEN MF, 1989, BIOL FERT SOILS, V8, P285, DOI 10.1007/BF00263155
[2]  
[Anonymous], 1986, PLASTICITY PLANTS
[3]  
Barber S. A., 1984, SOIL NUTRIENT BIOAVA
[4]   UPTAKE AND TRANSPORT OF CALCIUM AND PHOSPHORUS IN LOLIUM-PERENNE IN RESPONSE TO N SUPPLIED TO HALVES OF A DIVIDED ROOT-SYSTEM [J].
BARTA, AL .
PHYSIOLOGIA PLANTARUM, 1977, 39 (03) :211-214
[5]   THE INFLUENCE OF AMMONIUM AND CHLORIDE ON POTASSIUM AND NITRATE ABSORPTION BY BARLEY ROOTS DEPENDS ON TIME OF EXPOSURE AND CULTIVAR [J].
BLOOM, AJ ;
FINAZZO, J .
PLANT PHYSIOLOGY, 1986, 81 (01) :67-69
[6]   COPING WITH HERBIVORY - PHOTOSYNTHETIC CAPACITY AND RESOURCE-ALLOCATION IN 2 SEMI-ARID AGROPYRON BUNCHGRASSES [J].
CALDWELL, MM ;
RICHARDS, JH ;
JOHNSON, DA ;
NOWAK, RS ;
DZUREC, RS .
OECOLOGIA, 1981, 50 (01) :14-24
[7]  
CARTWRIGHT B, 1972, SOIL SCI PLANT ANAL, V3, P313
[8]  
CHAPIN FS, 1988, ECOLOGY, V69, P693
[9]   MICRO-PATTERNS OF NITROGEN MINERALIZATION ACTIVITY IN SOILS OF SOME SHRUB-DOMINATED SEMI-DESERT ECOSYSTEMS OF UTAH [J].
CHARLEY, JL ;
WEST, NE .
SOIL BIOLOGY & BIOCHEMISTRY, 1977, 9 (05) :357-365
[10]  
CLARKSON DT, 1978, PLANTA, V139, P47, DOI 10.1007/BF00390809