Shoot Physiological Responses of Two Bentgrass Cultivars to High Temperature and Poor Soil Aeration

Poor soil aeration is a factor limiting the productivity of boreal forests in western Canada. Soil compaction reduces air-filled porosity, which is hypothesized to further restrict soil aeration. Soil morphology at nine clearcut sites in west-central Alberta that had been significantly compacted by ground-based harvesting equipment and soil in an adjacent non-trafficked control were related to air-filled porosity and redox regimes. A warm-season air-filled porosity of about 0.1 m3 m-3 separated soils having adequate or restricted aeration, and was confirmed by redox < 200 mV. The values applied to both the undisturbed and compacted soil. Ratios of Feo:Fed and acid-soluble Fe:Mn in concretions were only associated with hydromorphism of undisturbed soil. Compaction reduced soil aeration for 3–4 yr after harvesting, and changed morphology of moderately well-drained soil to imperfectly drained soil at two of four sites; faster removal of water because of slope or vegetation probably prevented changes at the other two sites. Morphology of better and poorer drained soils was not altered by compaction because they either remain adequately aerated or aeration was naturally restricted. Sites with moderately well-drained soils are most at risk of detrimental soil compaction and in need of protective measures to maintain their productivity in these forests. Key words: Soil morphology, drainage class, air-filled porosity, soil aeration, redox potential, boreal forest soils, compaction

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Morpho-Physiological Responses of Rice (Oryza sativa L.) Varieties and Hybrids to High Temperature Stress

International Journal of Pure & Applied Bioscience ◽

10.18782/2320-7051.5721 ◽

2017 ◽

Vol 5 (4) ◽

pp. 1468-1477

Author(s):

R. Ramesh ◽

Keyword(s):

Oryza Sativa ◽

High Temperature ◽

Temperature Stress ◽

Oryza Sativa L ◽

Physiological Responses ◽

High Temperature Stress

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Study on Assessment of High Temperature and Humidity in Working Environment on Human Health

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.739 ◽

2012 ◽

Vol 610-613 ◽

pp. 739-742 ◽

Cited By ~ 1

Author(s):

Yu Ping Sun ◽

Neng Zhu

Keyword(s):

High Temperature ◽

Energy Metabolism ◽

Human Health ◽

Physiological Responses ◽

Working Environment ◽

Heat Diffusion ◽

Metabolic Heat ◽

Temperature And Humidity

In this study, a series of references on human physiology and psychology response to hot and humid environments were analyzed. On basis of the thermo metabolism system, energy metabolism system, cardiovascular system and respiratory system, impact mechanism of high temperature and humidity on human health was presented. The results indicate that the high temperature and humidity in working environment have significant impact on human health. The high temperature and humidity cause the reducing of temperature difference in vitro and in vivo, the difficult of metabolic heat diffusion, the significant increasing of energy metabolism and oxygen consumption, heart failure, hypoxia and other physiological responses.

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