| 沙坡头地段沙漠绿洲化进程的研究 |
| |
| 引用本文： | 孙宏义,刘新民.沙坡头地段沙漠绿洲化进程的研究[J].干旱区资源与环境,1995,9(3):88-92. |
| |
| 作者姓名： | 孙宏义 刘新民 |
| |
| 作者单位： | 中国科学院兰州沙漠研究所 |
| |
| 基金项目： | 中国科学院沙坡头沙漠试验研究指导基金，中国科学院兰州沙漠研究所所长基金 |
| |
| 摘 要： | 近四十年来，沙坡头地段沙漠绿洲化进程指明了该地段固沙造林逐渐逼近环境容纳量的三级近似过程，这种过程从无序走向有序的序参量是Ｈ＿（ｔ）＝１．３１３８ｅ￣１．０５７５／ｔ。该地段绿化进程的极限熵是Ｈ＿（ｔ）＝１．３１３８，相当于造林后第１０年的年降水量约１８６．２ｍｍ，沙层含水量１－２％的环境容纳量。
|
| 关 键 词： | 沙漠，绿洲化，熵，环境容量 |
A MODEL STUDY OF REVEGETATION PROCESS ON SANDY DESERT IN THE SHAPOTOU AREA,NINGXIA AUTONOMOUS REGION |
| |
| Sun Hongyi, Liu Xinmin, ShiQinghui, Li yujun.A MODEL STUDY OF REVEGETATION PROCESS ON SANDY DESERT IN THE SHAPOTOU AREA,NINGXIA AUTONOMOUS REGION[J].Journal of Arid Land Resources and Environment,1995,9(3):88-92. |
| |
| Authors: | Sun Hongyi Liu Xinmin ShiQinghui Li yujun |
| |
| Abstract: | The revegetation process on the sand dunes of the Tenger Desert in the ShapotouArea,has been carried on for 40 years. The results showed that the vegetation process hasreached the third stage of the approximate period of the water environmental capacity. It isan open self-tissue structure process from chaos to order, formed by the non-equilibriumecosystem,and can be expressed by a rnodel H(t)=1.3138e￣1,0576/t.The equilibrium entropyfor the revegetation process in this area was estin1ated to be H(t)=1.3138, approximatelyequal to the water environmental capacity in the tenth year after plantation with the l86.2mm of annual precipitation and the 1-2% of soil water content in the root layer of thesand dunes. |
| |
| Keywords: | Desert Revegetation Environmental capacity Entropy |
| 本文献已被 CNKI 维普 等数据库收录！ |
