| 农业土壤应力状态与作物根系生长相关性研究 |
| |
| 引用本文： | 郭维俊,黄高宝,王芬娥,牛俊义. 农业土壤应力状态与作物根系生长相关性研究[J]. 兰州大学学报(自然科学版), 2006, 42(2): 120-123 |
| |
| 作者姓名： | 郭维俊 黄高宝 王芬娥 牛俊义 |
| |
| 作者单位： | 甘肃农业大学,工学院,甘肃,兰州,730070;甘肃农业大学,农学院,甘肃,兰州,730070 |
| |
| 摘 要： | 分析了农业土壤在自然条件下的力学特性和任一深度的应力状态,得到土壤任一点的垂直应力和水平侧向应力的计算公式.通过模拟试验,研究了土壤应力变化对小麦、玉米根系生长发育及其根系分布规律的影响.结果表明:作物根系在土壤中的分布随土壤应力的变化呈指数曲线变化.土壤应力增大,作物根量、根表面积减小.
|
| 关 键 词： | 作物生长 作物根系 土壤应力 |
| 文章编号： | 0455-2059（2006）02-0120-04 |
| 收稿时间： | 2005-11-30 |
| 修稿时间： | 2005-11-30 |
Study on the stress-state of agricultural soil and the distribution of the crop root system |
| |
| GUO Wei-jun,HUANG Gao-bao,WANG Fen-e,NIU Jun-yi. Study on the stress-state of agricultural soil and the distribution of the crop root system[J]. Journal of Lanzhou University(Natural Science), 2006, 42(2): 120-123 |
| |
| Authors: | GUO Wei-jun HUANG Gao-bao WANG Fen-e NIU Jun-yi |
| |
| Affiliation: | 1. College of Engineering, Gansu Agricultural University, Lanzhou 730070, China 2. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China |
| |
| Abstract: | According to the strength of crop root system into agricultural soil, the stress-state at a point in agricultural soil is profoundly analyzed in this paper. The formulas of the vertical stress and horizontal side stress at a point in agricultural soil are established through strict calculation. The Influence of soil stress for wheat and maize root growth and distribution are studied by field stimulant experiment and the results indicated that the distribution of crop roots in soil changes on the basis of index curve formed by the change in soil stress. The quantity and the surface area of crop roots decrease progressively with the increase in the depth and stress of soil. |
| |
| Keywords: | crop growth crop root system stress of agricultural soil |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
