干旱区生态环境知识资源中心

This study was conducted for 25 artificial plants in the hinterland of Taklimakan Desert, variance analysis and correlation analysis were used together to determine the stoichiometric characteristics and its relationship for leaf C, N, P content. The results showed that the leaf C, N, P were (386.7 +/- 46.6), (24.7 +/- 8.1) and (1.8 +/- 0.78) mg g(-1) respectively. C:N, C:P were (17.5 +/- 6.7), (249.2 +/- 102.8) respectively, which were lower than the average of global land plants. And 14 < N: P < 16 (15.0 +/- 5.6), which indicated plants growth were restricted by N and P together in the study area. Also the N content for legume plants was greatly higher than non-legume plants. C, N and P content were presented as herb > shrub > tree. The correlation analysis indicated that leaf C: N, C: P were negatively correlated with N, P content significantly, while no correlation between leaf N and P. In all, the above results documented that extreme environment of nutrition limited area restricted the plants' nutrients use efficiency, which may be the adaptive strategy for the artificial plants. Besides, different functional groups had different adaptability to environment, and nutrient adapt strategy diversity was presented in this study.