Rising carbon dioxide (CO2) concentrations in atmosphere have a significant impact on plant growth and metabolism. Many promoting microbes play an important role maintaining vitality by facilitating nutrient translocation under adverse conditions. This study was carried out to investigate the effects of elevated CO2 parameters (height seedlings, increment height, collar diameter number leaves) ...

Asymmetrical warming between elevations is a common phenomenon and magnitude increases with increasing on the Tibetan Plateau, which in turn may reduce temperature differences elevations. However, it still unclear how such will affect plant community composition alpine grasslands Plateau. Therefore, this study, we performed an experiment at three (i.e., 4,300 m, 4,500 4,700 m) grasslands, North...

physical modeling for study of deep foundations can be performed in simple chambers (1g), calibration chambers (cc), and centrifuge apparatus (ng). these common apparatus face certain limitations and difficulties. recently, frustum confining vessels (fcv) have been evolved for physical modeling of deep foundations and penetrometers. shaped as the frustum of a cone, this device applies steady pr...

to study the effects of carbon dioxide enrichment on morphological, nutrient absorption and yield of wheat (triticum aestivum l. cv. pishtaz) under weed competitive pressure of wild oat (avena ludovicianal.), an experiment was conducted as a split plot based on a randomized completely block design during the 2013-2014 growing season at the research field of tarbiat modares university, iran. car...

In Agave angustifolia Haw., a leaf-succulent constitutive crassulacean acid metabolism (CAM) plant of tropical Panama, we tested whether nocturnal CO2 uptake and growth were reduced at night temperatures above 20 C. Unlike some CAM model species from habitats with pronounced day-night temperature variations, in A. angustifolia temperature affected little the relative contributions of CAM and C3...

An open top chamber experiment was carried out in the summer of 2003 to examine the effect of nitrous acid (HONO) gas on the physiological status of Scots pine saplings (Pinus sylvestris). Four-year-old pine trees were exposed to two different levels of HONO gas (at ca. 2.5 ppb and 5.0 ppb) and a control (filtered air) from early evening to early morning (18:00-6:00), in duplicate open top cham...

Open top chambers (OTCs) were adopted as the recommended warming mechanism by International Tundra Experiment network in early 1990s. Since then, OTCs have been deployed across globe. Hundreds of papers reported impacts on abiotic environment and biota. Here, we review OTC physical environment, with comments appropriateness using to characterize response biota warming. The purpose this is guide...