scholarly journals Evaporative Fraction as an Indicator of Moisture Condition and Water Stress Status in Semi-Arid Rangeland Ecosystems

2014 ◽  
Vol 6 (7) ◽  
pp. 6300-6323 ◽  
Author(s):  
Francesco Nutini ◽  
Mirco Boschetti ◽  
Gabriele Candiani ◽  
Stefano Bocchi ◽  
Pietro Brivio
Keyword(s):  
Water Stress ◽  
Evaporative Fraction ◽  
Moisture Condition ◽  
Semi Arid ◽  
Arid Rangeland

Long-term impacts of infrequent biosolids applications on chemical and microbial properties of a semi-arid rangeland soil

2005 ◽  
Vol 42 (3) ◽  
pp. 258-266 ◽  
Author(s):  
Tarah S. Sullivan ◽  
Mary E. Stromberger ◽  
Mark W. Paschke ◽  
James A. Ippolito
Keyword(s):  
Microbial Properties ◽  
Semi Arid ◽  
Arid Rangeland

The relationship between species diversity and functional diversity along aridity gradients in semi-arid rangeland

2021 ◽  
Vol 195 ◽  
pp. 104632
Author(s):  
Guy Dovrat ◽  
Ehud Meron ◽  
Moshe Shachak ◽  
Yosef Moshe ◽  
Yagil Osem
Keyword(s):  
Species Diversity ◽  
Functional Diversity ◽  
The Relationship ◽  
Semi Arid ◽  
Arid Rangeland

Suitability of NDVI and OSAVI as estimators of green biomass and coverage in a semi-arid rangeland

2018 ◽  
Vol 94 ◽  
pp. 16-21 ◽  
Author(s):  
Rachel R. Fern ◽  
Elliott A. Foxley ◽  
Andrea Bruno ◽  
Michael L. Morrison
Keyword(s):  
Semi Arid ◽  
Arid Rangeland

scholarly journals Under-vine cover crops: impact on weed development, yield and grape composition

OENO One ◽  
2020 ◽  
Vol 54 (4) ◽  
pp. 975-983
Author(s):  
Javier Abad ◽  
Marín Diana ◽  
Santesteban L. Gonzaga ◽  
Cibriáin José Félix ◽  
Sagüés Ana
Keyword(s):  
Water Stress ◽  
Cover Crops ◽  
Drip Irrigation ◽  
Vegetative Growth ◽  
Cover Crop ◽  
Sustainable Management ◽  
Arid Regions ◽  
Management Tool ◽  
Second Year ◽  
Semi Arid

This study aims to evaluate the interest of using an under-vine cover crop as a sustainable management tool replacing herbicides or tillage to control weeds, evaluating its effects on yield and berry parameters in a semi-arid climate. The performance of Trifolium fragiferum as an under-vine cover crop was evaluated in 2018 and 2019 in a Merlot vineyard in Traibuenas (Navarra, Spain). This trial showed that the soil under the vines was covered by 80 % of the cover crop in August 2018 and 100 % in Aug 2019, with clover (T. fragiferum) comprising around 26 % and 70 % of the cover crop surface, respectively. The presence of the cover crop only reduced the number of shoots in the second year, although both years there was an increment in water stress. Neither yield, cluster weight nor berry weight were affected by the presence of the under-vine cover crop. Similarly, no changes in grape composition were observed. The use of T. fragiferum-like cover crops under the vine allows for better control of weeds, provided a good installation is achieved. In the first two years, this cover crop reduced vegetative growth and increased water deficit slightly. However, no changes in yield and grape composition were observed.In a context of herbicide suppression and search for sustainable management, under-vine clover cover crops constitute a viable alternative in semi-arid regions provided drip irrigation can be applied. 

scholarly journals Growth and yield of wheat (Triticum aestivum) under deficit irrigation

2014 ◽  
Vol 38 (4) ◽  
pp. 719-732 ◽  
Author(s):  
PK Sarkar ◽  
MSU Talukder ◽  
SK Biswas ◽  
A Khatun
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Water Deficit ◽  
Deficit Irrigation ◽  
Water Productivity ◽  
Root Initiation ◽  
Moisture Condition ◽  
Soil Moisture Condition ◽  
Crown Root ◽  
Initiation Stage

Timing and the extent of water deficit were studied in a field experiment on wheat (cv. Shatabdi) for three consecutive years from 2003-04 through 2005-06 at Jamalpur area. The effects of number and timing of irrigation application on yields were investigated under variable soil moisture condition in the root zone of different treatments. Eight deficit irrigations, including one no stress and one rainfed treatments were selected to subject the crop to various degrees of soil water deficit at different stages of crop growth. Measured amount of irrigation water was applied as per schedule prescribed for a particular treatment. Grain yield (GY), biomass, harvest index (HI), and water productivity (WP) were reasonably affected by deficit irrigation. Other yield contributing parameters like 1000-grain weight, grains/spike and spike, length were also affected by different levels of deficit irrigation. During grain formation stage, water deficit did not affect the grain yield but saved water significantly. Such water deficit treatments also shortened the grain maturation period. Differences in grain and straw yield among the stressed and no stress treatments are comparatively small, and statistically insignificant in some cases. The highest water productivity (2.02 kg/m3) was observed in treatment which was irrigated only once at crown root initiation stage (T2) although the yield was comparatively low. The CRI (crown root initiation) stage was found the most sensitive to water stress. Water stress at vegetative stage also reduced the yield considerably. DOI: http://dx.doi.org/10.3329/bjar.v38i4.19663 Bangladesh J. Agril. Res. 38(4): 719-732, December 2013

scholarly journals Morphological Features and Biomass Partitioning of Lucerne Plants (Medicago sativa L.) Subjected to Water Stress

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 322
Author(s):  
Yong-Zhong Luo ◽  
Guang Li ◽  
Guijun Yan ◽  
Hui Liu ◽  
Neil C. Turner
Keyword(s):  
Water Stress ◽  
Water Supply ◽  
Lateral Root ◽  
Dry Weight ◽  
Agricultural Systems ◽  
Root Dry Weight ◽  
Severe Water Stress ◽  
Medicago Sativa L ◽  
Leaf Dry Weight ◽  
Semi Arid

Drought is one of the major abiotic stresses affecting the morphological, physiological, and metabolic processes of plants, and hence their growth and production on a global scale. Lucerne (Medicago sativa L.) is one of the most popular pasture species in semi-arid regions and plays a critical role in sustaining agricultural systems in many areas of the world. In order to evaluate the effect of water deficits on the growth and biomass distribution in different tissues of lucerne, plant height, leaf dry weight, leaf number and area, root dry weight, taproot length and lateral root number, and stem dry weight were measured at four stages from the seedling to flowering stages under three water regimes: (i) adequate water supply (minimum soil water content 85% pot capacity (PC)), (ii) moderate water stress (65% PC), and (iii) severe water stress (45% PC), imposed under a rainout shelter. With limited water supply, plant height, leaf number, leaf area and dry weight, taproot length, and total biomass were reduced, while lateral root numbers increased. The number of smaller leaves and root dry weight increased under moderate water stress, whereas severe water stress reduced them. Leaf, stem, and total dry weight were all reduced by the water deficits, but leaf dry weight was reduced the most and root dry weight the least, so there was a redistribution of biomass towards the roots, increasing the root–shoot ratio. These results help us to understand the response of lucerce to water stress and assist in developing a foundation for the sustainable use of lucerne in semi-arid agricultural systems.

scholarly journals Anthocyanin Induction by Drought Stress in the Calyx of Roselle Cultivars

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1555 ◽  
Author(s):  
Jeny Hinojosa-Gómez ◽  
César San Martín-Hernández ◽  
José B. Heredia ◽  
Josefina León-Félix ◽  
Tomás Osuna-Enciso ◽  
...  
Keyword(s):  
Water Stress ◽  
Abiotic Factors ◽  
Control Level ◽  
Ultra Performance Liquid Chromatography ◽  
Anthocyanin Content ◽  
Hibiscus Sabdariffa ◽  
Chemical Profile ◽  
Moisture Condition ◽  
Total Anthocyanin ◽  
Total Anthocyanin Content

Abiotic factors can alter the chemical profile of crops and the number of compounds they contain. In this study, the anthocyanin and anthocyanidin contents, determined by ultra-performance liquid chromatography (UPLC-MS/MS), and the colour attributes of the calyces of three cultivars of Hibiscus sabdariffa subjected to three water stress regimes during the stage of physiological maturity were investigated. The total anthocyanin content in calyx increased relative to the control content under a 65% moisture irrigation regime. Among the cultivars, UAN16-2 showed the greatest increases in the contents of cyanidin, delphinidin 3-O-glucoside, cyanidin 3-O-glucoside, and cyanidin 3-O-sambubioside. The content of cyanidin 3-O-sambubioside showed the greatest increase, increasing by 55% relative to the control level. The contents of these compounds are correlated with colour attributes such as luminosity. Water stress under the 33% moisture condition during plant development led to decreased anthocyanin contents in all of the roselle cultivars.

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