Arid Zone Research ›› 2022, Vol. 39 ›› Issue (1): 220-229.doi: 10.13866/j.azr.2022.01.21

Previous Articles     Next Articles

Population ecological features of Phragmites australis in sandy habitats on the southern edge of Badain Jaran Desert

LIU Xin1,2(),JIAO Jian3,WANG Ting1,2,ZHANG Lingyu1,2,LI Chaozhou1,2()   

  1. 1. College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    2. Gansu Key Laboratory of Crop Genetics and Germplasm Enhancement, Lanzhou 730070, Gansu, China
    3. College of Forestry, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2021-03-12 Revised:2021-09-07 Online:2022-01-15 Published:2022-01-24
  • Contact: Chaozhou LI E-mail:liux9688@163.com;licz@gsau.edu.cn

Abstract:

The structural characteristics, age structure, dynamic characteristics, and spatial distribution pattern of Phragmites australis in two types of sandy habitat in the southern margin of Badain Jaran Desert were investigated. Results showed that the following. (1) The plant height, total biomass, and biomass of each component of Phragmites australis in common sandy land were higher than those in saline sandy land. Soil water content and salt content were the important driving factors for the differences in Phragmites australis morphological characteristics in this area. (2) Due to the different soil conditions and the different degrees of interspecies competition, different age structures and dynamic change trends were shown in different sample plots; in common sandy soil, the Phragmites australis population tended to decline, whereas the population of Phragmites australis in saline sand soil tended to increase. (3) The spatial pattern of the Phragmites australis population in the common sandy habitat had an aggregated distribution on a scale of 0-4 m and a random distribution on a scale >4 m. However, the function values of the saline sandy habitat were generally between two enveloped trace lines and distributed randomly on a scale from 0 to 10 m.

Key words: Badain Jaran Desert, sand, Phragmites australis population, component characteristics, age structure, quantitative dynamic change, spatial distribution pattern