Application of herb-chronology: Annual fertilization and climate reveal annual ring signatures within the roots of U.S. tallgrass prairie plants
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Roots of forbs sense climate fluctuations in the semi-arid Loess Plateau: Herb-chronology based analysis
Growth of herbaceous plants responds sensitively and rapidly to climate variability. Yet, little is known regarding how climate warming influences the growth of herbaceous plants, particularly in semi-arid sites. This contrasts with widely reported tree growth decline and even mortality in response to severe water deficits due to climate warming around the world. Here, we use the relatively nov...
متن کاملPartitioning of Nitrogen over Five Growing Seasons in Tallgrass Prairie
Annual spring burning of tallgrass prairie increases plant biomass production despite losses of N and lower net N mineralization. To better understand how burning influences the cycling of N in prairie, '5N was injected to soil as NH4+, and the partitioning between plant and soil N pools was followed over five growing seasons in annually burned and unburned prairie. Applied '5N was rapidly immo...
متن کاملSubstrate regulation of soil respiration in a tallgrass prairie: Results of a clipping and shading experiment
[1] Changes in soil respiration, one of the major fluxes of global carbon cycling, could significantly slow down or accelerate the increase in atmospheric CO2, with consequent feedbacks to climate change. It is critical to understand how substrate availability regulates soil respiration in projecting the response of carbon cycling to changed climate. We conducted a clipping and shading experime...
متن کاملDIVISION S-3—SOIL BIOLOGY & BIOCHEMISTRY Short-Term Competition for Ammonium and Nitrate in Tallgrass Prairie
plant biomass production increases in response to burning, quantities of available soil N may not be sufficient The availability of N limits productivity in tallgrass prairie. Spring to meet plant demand. burning is common because it results in greater plant productivity Although the total mass of N in the Konza Prairie in despite reducing net N mineralization. To better explain how burning Kan...
متن کاملGrowth rings in the roots of temperate forbs are robust annual markers.
There is increasing interest in the analysis of annual growth rings in the secondary root xylem of perennial forbs (herb-chronology). Therefore, we need to verify whether these growth rings are always formed annually. To investigate the formation of root rings we performed common garden experiments at two distinct sites in Switzerland. We grew nine unrelated forb species from seed and subjected...
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تاریخ انتشار 2016