Impact of Soil Moisture Stress on Rice Productivity in Warming Climate over Indian Mid-Indo-Gangetic Plain

2021 ◽  
Vol 9 (1) ◽  
pp. 21-31
Author(s):  
Kanhu C. Panda ◽  
Ashish Kumar ◽  
Satya N. Pradhan ◽  
Nirmal De ◽  
Vijay Singh Meena
Keyword(s):  
Soil Moisture ◽  
Moisture Stress ◽  
Soil Moisture Stress ◽  
Gangetic Plain ◽  
Rice Productivity ◽  
Warming Climate ◽  
Indo Gangetic Plain

scholarly journals Improved understanding of drought controls on seasonal variation in Mediterranean forest canopy CO<sub>2</sub> and water fluxes through combined in situ measurements and ecosystem modelling

2009 ◽  
Vol 6 (8) ◽  
pp. 1423-1444 ◽  
Author(s):  
T. Keenan ◽  
R. García ◽  
A. D. Friend ◽  
S. Zaehle ◽  
C. Gracia ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Forest Canopy ◽  
Moisture Stress ◽  
Mediterranean Ecosystems ◽  
Forest Growth ◽  
Water Fluxes ◽  
Soil Moisture Stress ◽  
Dynamic Global Vegetation Model ◽  
Forest Growth Model

Abstract. Water stress is a defining characteristic of Mediterranean ecosystems, and is likely to become more severe in the coming decades. Simulation models are key tools for making predictions, but our current understanding of how soil moisture controls ecosystem functioning is not sufficient to adequately constrain parameterisations. Canopy-scale flux data from four forest ecosystems with Mediterranean-type climates were used in order to analyse the physiological controls on carbon and water flues through the year. Significant non-stomatal limitations on photosynthesis were detected, along with lesser changes in the conductance-assimilation relationship. New model parameterisations were derived and implemented in two contrasting modelling approaches. The effectiveness of two models, one a dynamic global vegetation model ("ORCHIDEE"), and the other a forest growth model particularly developed for Mediterranean simulations ("GOTILWA+"), was assessed and modelled canopy responses to seasonal changes in soil moisture were analysed in comparison with in situ flux measurements. In contrast to commonly held assumptions, we find that changing the ratio of conductance to assimilation under natural, seasonally-developing, soil moisture stress is not sufficient to reproduce forest canopy CO2 and water fluxes. However, accurate predictions of both CO2 and water fluxes under all soil moisture levels encountered in the field are obtained if photosynthetic capacity is assumed to vary with soil moisture. This new parameterisation has important consequences for simulated responses of carbon and water fluxes to seasonal soil moisture stress, and should greatly improve our ability to anticipate future impacts of climate changes on the functioning of ecosystems in Mediterranean-type climates.

scholarly journals Erratum: Effect of soil moisture stress from flowering to grain maturity on functional properties of Sri Lankan rice flour

2011 ◽  
Vol 63 (6) ◽  
pp. 392-392 ◽  
Author(s):  
Anil Gunaratne ◽  
Upul Kumari Ratnayaka ◽  
Nihal Sirisena ◽  
Jennet Ratnayaka ◽  
Xiangli Kong ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Functional Properties ◽  
Rice Flour ◽  
Moisture Stress ◽  
Sri Lankan ◽  
Soil Moisture Stress

The effects of soil moisture stress on the growth of barley. I. Vegetative development and grain yield

1964 ◽  
Vol 15 (5) ◽  
pp. 729 ◽  
Author(s):  
D Aspinall ◽  
PB Nicholls ◽  
LH May
Keyword(s):  
Grain Size ◽  
Soil Moisture ◽  
Grain Yield ◽  
Stem Elongation ◽  
Moisture Stress ◽  
The Other ◽  
Vegetative Development ◽  
Soil Moisture Stress ◽  
The One ◽  
Periods Of Stress

The effects of soil moisture stress on tillering, stem elongation, and grain yield of barley (cv. Prior) have been studied by subjecting the plants to periods of stress at different stages of development. Soil moisture stress treatments consisted of repeated short cycles of stress, single short cycles (both in large pots), or single long cycles (in large lysimeters). The data collected support the contention that the organ which is growing most rapidly at the time of a stress is the one most affected. Grain numbers per ear were seriously affected by stress occurring prior to anthesis, an effect probably associated with the process of spikelet initiation and, later, with the formation of the gametes. Grain size, on the other hand, was reduced more by stress at anthesis and shortly after. Elongation of the internodes was reduced mostly by stress at or just before earing, and was less seriously affected by earlier or later stress. Tillering, although being suppressed during a drought cycle, was actually stimulated upon rewatering. The effect was greater the earlier the period of stress, and was probably related to nutrient uptake and distribution within the plant.

Effects of atmospheric humidity and zonal soil water stress on initial growth of planted northern red oak seedlings

1980 ◽  
Vol 10 (4) ◽  
pp. 549-554 ◽  
Author(s):  
M. M. Larson
Keyword(s):  
Soil Moisture ◽  
Dry Weight ◽  
Moisture Stress ◽  
Red Oak ◽  
Initial Growth ◽  
Northern Red Oak ◽  
Soil Moisture Stress ◽  
Root Regeneration ◽  
Lower Root ◽  
Stress Levels

Northern red oak (Quercusrubra L.) 1-0 seedlings were planted in plastic tubes with a rubber moisture barrier placed around taproots at midpoint so that upper and lower sections of the root system could be independently watered with polyethylene glycol solutions to induce various soil moisture stress conditions. Trees were also grown at two relative humidity (RH) levels.In the first of two studies, soil moisture stress levels were −1/3, −3, −6 bars (1 bar = 105 Pa), and RH's were 75 and 45%. Root regeneration (largely confined to cut end of lower taproot) and top growth decreased, and dieback of planted stems increased, as soil moisture stress of either upper or lower root sections increased. When both sections were −6 bars, root regeneration was nil.In the second study, upper root soil moisture stress levels included a −12-bar treatment which reduced dry weight of leaves and roots to about one-half that of unstressed plants. However, a unit increase in stress to lower root sections was 1.5 to 4 times more inhibitory to growth than a similar stress to upper root sections. Low RH decreased several measures of seedling growth, increased stem dieback, and prolonged time to budbreak from 6 to 12 days for most soil moisture treatments.These studies demonstrate that root regeneration is very sensitive to soil moisture stress on lower roots, where most of the new roots originate, and moderately sensitive to stress on upper roots and to atmospheric stress on shoots.

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