|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4393653||1305496||2011||4 صفحه PDF||سفارش دهید||دانلود رایگان|
The Mu Us Sandland is basically characterized by water shortage and high wind. Thus, wind-induced mechanical perturbation (MP) and soil water availability are likely to interact to affect plant growth. Since high water availability and MP can induce responses that are in the opposite direction, we hypothesized that MP effects on perennial grasses might be mitigated by increased soil water availability in the Mu Us Sandland. We counducted an experiment in which seedlings of Psammochloa villosa were subjected to two levels of MP (non-MP vs. MP 1 min d−1) and two levels of water availability (200 ml d−1vs. 400 ml d−1) and measured three plant traits. MP significantly decreased plant height, total biomass, and root/shoot ratio. There were significant interactions between MP and soil water availability on plant height and root/shoot ratio. These findings imply that MP alone is a stressful factor for P. villosa and MP effects on its growth can be partially mitigated by increased soil water availability, and also suggest that P. villosa may respond to MP in a way that allows plants to survive in the windy semiarid environments.
► We study the interactive effects of mechanical perturbation (MP) and water on P. villosa.
► MP is a stressful factor for P. villosa and MP effects can be mitigated by increased water availability.
► P. villosa may respond to MP in a way that allows plants to survive in the windy semiarid environments.
Journal: Journal of Arid Environments - Volume 75, Issue 10, October 2011, Pages 974–977