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Effects of simulated precipitation addition on growth and root morphological characteristics of desert plant seedling

Precipitation is the most important limiting factor for processes and functions of desert ecosystems and desert plant seedlings are extremely sensitive to precipitation changes during the growing season. In order to explore the response of desert plant seedlings to future precipitation pattern changes, two typical desert plant seedlings (Nitraria tangutorum and Artemisia ordosica) in Ulan Buh desert were selected as research objects. The artificial simulated precipitation addition experiment was conducted with five different gradients ( CK: natural precipitation, A: + 25% precipitation, B: + 50% precipitation, C: +75% precipitation, D: +100% precipitation) based on the precipitation of growing season from June to September to study the growth of two plant seedlings and the response of root morphological characteristics to precipitation