Forestry Academy of Xinjiang

Urunchi, China

Forestry Academy of Xinjiang

Urunchi, China
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Xu D.-F.,Nanjing University of Information Science and Technology | Ning H.-S.,Forestry Academy of Xinjiang | Wang R.-H.,Nanjing University of Information Science and Technology | Ji X.-M.,Forestry Academy of Xinjiang | And 2 more authors.
Chinese Journal of Ecology | Year: 2010

A comparative study was made on the soil fertility in Moyu County of Xinjiang under effects of four sand control engineering measures. Differences were observed in the soil pH and nutrient contents under different sand control engineering measures. The soil pH value followed the order of natural sparse vegetation fencing area > grass grid and artificial forest > artificial forest > area collocated with multi-plants, and was significantly higher under natural sparse vegetation fencing area (P<0. 05). The soil nutrient contents were affected by the duration of plant establishment. In the artificial forest having been established for three years, the contents of soil organic matter, total nitrogen, available nitrogen, total phosphorus, available phosphorus, and available potassium were higher than those in the newly established (half year) grass grid and artificial forest area. In the area collocated with multi-plants, the contents of soil organic matter, total nitrogen, available nitrogen, total phosphorus, and total potassium were higher, but the soil available phosphorus and potassium contents were relatively lower than those in other test engineering areas. Therefore, P and K fertilizers should be applied in the area collocated with multiplants.


Qi Y.-L.,Chinese Academy of Forestry | Zhu Y.-J.,Chinese Academy of Forestry | Jia Z.-Q.,Chinese Academy of Forestry | Shi J.-H.,Forestry Academy of Xinjiang
Forest Research | Year: 2011

Five physiological indexes(leaf proline content, K+/Na+, Cl- content, SOD activity, and MDA content) were chosen to evaluate the comprehensive salt tolerance of Populus euphratica and Tamarix spp. in natural riparian forest by subordinate function in Yuli County. With the increase of soil salinity, the leaf proline content of P. euphratica increased, its K+/Na+ did not change, the Cl- content and SOD activity increased then decreased, MDA content decreased. However, the leaf proline content, K+/Na+, SOD activity and MDA content of Tamarix spp. increased and its Cl- content decreased. The leaf proline content of P. euphratica was significantly higher than Tamarix spp. in three plots (p<0.05). In plot 1 with the highest soil salt content, the leaf proline contents of P. euphratica and Tamarix spp. were 902.70 and 732.99 μg·g-1. The leaf K+/Na+ and MDA content of Tamarix spp. were significantly higher than that of P. euphratica in plots 1 and 2 with higher soil salt content in 0-10 cm depth (p<0.05). In plot 1, the leaf K+/Na+ of P. euphratica and Tamarix spp. were 0.060 and 0.095 and the leaf MDA content of P. euphratica and Tamarix spp. were 8.23 and 13.96 μmol·g-1. The leaf Cl- content of P. euphratica was significantly higher than that of Tamarix spp. in plot 1 and 2 (p<0.05). The leaf Cl- content of P. euphratica and Tamarix spp. were 2.59 and 1.49 μg·min-1 in plot 2. The leaf SOD activity of Tamarix spp. (0.43 U·mg-1·min-1) was significantly higher than that of P. euphratica (0.37 U·mg-1·min-1) in plots 1 (p<0.05). The preliminary conclusion is that the salt tolerance of P. euphratica is higher than that of Tamarix spp., according to the results of subordinate function. The salt tolerance mechanism is different in two plants: P. euphratica tolerates salt by increasing leaf proline and decreasing leaf Cl- content, whereas Tamarix spp. tolerates salt by increasing leaf proline content, improving leaf K+/Na+ and enhancing SOD activity under higher soil salinity condition.

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