CALCULATING DAILY ROOT LENGTH DENSITY PROFILES BY APPLYING ELASTIC THEORY TO AGRICULTURAL SOILS

被引:6
作者
RICKMAN, RW
WALDMAN, SE
KLEPPER, BL
机构
[1] USDA-ARS, Columbia Plateau Conservation Research Center, Pendleton, Oregon 97801
关键词
D O I
10.1080/01904169209364353
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Proper growth and function of plant roots are critical for crop production. The study of root systems to elucidate their link to production is expensive and labor intensive. The use of computer simulations, both to summarize existing knowledge of root system growth and to guide research promises to speed our understanding of the complex interdependence of the crop root and shoot systems. Of the many factors restricting root penetration into the profile, soil strength is perhaps the most difficult to describe and measure. We propose to compute with general elastic theory a soil-imposed resistance to root penetration using an elastic modulus for the soil. The application of the theory to agricultural soils is discussed and the specific application to root expansion in a soil cylinder is developed. Computations of root length density profiles and root depth over time in both uniform and layered profiles with known elastic modulis are provided as examples of predicted root growth based on this theory.
引用
收藏
页码:661 / 675
页数:15
相关论文
共 27 条
  • [1] ABBOTT JA, 1968, AM SOC HORT SCI, V93, P725
  • [2] BAKER DN, 1986, TECH B S CAROLINA AG, V1089
  • [3] BAULD NR, 1982, MECHANICS MATERIALS
  • [4] Bohm W, 1979, PLANT NUTR SOIL SCI, DOI DOI 10.1002/JPLN.19801430323
  • [5] BIOPHYSICAL CONTROL OF PLANT-CELL GROWTH
    COSGROVE, D
    [J]. ANNUAL REVIEW OF PLANT PHYSIOLOGY AND PLANT MOLECULAR BIOLOGY, 1986, 37 : 377 - 405
  • [6] DEROOCK B, 1967, T ASAE, V10, P471
  • [7] MECHANICS OF ROOT-GROWTH
    DEXTER, AR
    [J]. PLANT AND SOIL, 1987, 98 (03) : 303 - 312
  • [8] COMPRESSION OF SOIL AROUND ROOTS
    DEXTER, AR
    [J]. PLANT AND SOIL, 1987, 97 (03) : 401 - 406
  • [9] GLINSKI J, 1990, SOIL PHYSICAL CONDIT
  • [10] PHYSICS OF ROOT GROWTH
    GREACEN, EL
    OH, JS
    [J]. NATURE-NEW BIOLOGY, 1972, 235 (53): : 24 - &