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Evaluation of Plant Densities and Various Irrigation Regimes of Sorghum (Sorghum bicolor L.) under Low Water Supply
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Journal of Water Resource and Protection. Vol. 8 Issue 1, p1-11. 11 p.
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Ali A. Alderfasi;Mostafa M. Selim;Bushra A. Alhammad
Academic Journal
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Journal of Water Resource and Protection. Vol. 8 Issue 1, p1-11. 11 p.
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Drought stress, during growth season along with plant density, is an important problem...
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Evaluation of Plant Densities and Various Irrigation Regimes of Sorghum (Sorghum bicolor L.) under Low Water Supply
Journal of Water Resource and Protection. Vol. 8 Issue 1, p1-11. 11 p.
Drought stress, during growth season along with plant density, is an important problem that needs attention. In order to investigate the influence of both factors in increasing the water use efficiency, field experiments were laid out in split-plot design at Agriculture Research Station, Collage of Food and Agriculture Sciences, King Saud University, to investigate the effects of irrigation intervals viz., irrigation every (6, 9 and 12 days) under different plant densities i.e., (6, 8 and 10 plants/m^2) on growth, yield and yield component parameters as well as grain quality of sorghum local variety (Gizani). Results revealed that almost all growth, yield and yield component parameters were significantly influenced by both factors as well as their interaction. Chemical composition of seeds, leaf proline content and WUE were also considered. Severe drought stress condition caused gradual decrease in most of the growth characters as compared to watered treatment and reflected in decreasing yield and yield component characters. Increasing plant densities led to raise biomass production and seed yield per unit area and not able to compensated the low number and weight of grains per panicle. Contrary, low plant density, under adequate irrigation conditions, can be compensated by a high number of grains per panicle and high weight of the grain. Maximum seed yield per hectare was recorded by the interactional effects of most watered treatments (irrigation every 6 days) and plant density of 10 plants per square meter.
Subject terms:
Sorghum - Plant Density - Plant Population - Irrigation - Water Use Efficiency - Drought StressContent provider:
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Physiological tolerance and cation accumulation of different genotypes of Capsicum annum under varying salinity stress
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Proceedings of the International Academy of Ecology and Environmental Sciences, Vol 4, Iss 1, Pp 39-49 (2014)
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Muhammad Afzal;Awais Ahmad;Ali Abdullah Alderfasi
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Proceedings of the International Academy of Ecology and Environmental Sciences, Vol 4, Iss 1, Pp 39-49 (2014)
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A greenhouse experiment was demonstrated to compare tolerance ability of four genotype...
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Physiological tolerance and cation accumulation of different genotypes of Capsicum annum under varying salinity stress
Proceedings of the International Academy of Ecology and Environmental Sciences, Vol 4, Iss 1, Pp 39-49 (2014)
A greenhouse experiment was demonstrated to compare tolerance ability of four genotypes (Desi, Sanam, Kundri, Asia Bok) of Capsicum annum L. under different levels of saline stress (i.e., control, 40, 80 and 120 mM NaCl). Growth parameters (root, shoot; fresh and dry weight) and physiological (Na+, K+, Ca++, concentration, stomatal conductance, transpiration rate, photosynthetic rate, chlorophyll a, b contents) indicators were analyzed to determine tolerability of genotypes. The results indicated that, all genotypes tolerated only under low level of salinity stress (40 mM NaCl) while a severe growth suppress in general was observed at higher levels (80 and 120 mM [...]
Subject terms:
salinity - genotypes - growth - physiology - tolerance - Biology (General) - QH301-705.5 - Science - QContent provider:
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Use of crop water stress index for monitoring water status and scheduling irrigation in wheat
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Agricultural Water Management, 2001, 47, 1, 69.
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Alderfasi, Ali Abdullah;Nielsen, David C.
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Agricultural Water Management, 2001, 47, 1, 69.
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No abstract is available for this item.
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Use of crop water stress index for monitoring water status and scheduling irrigation in wheat
Agricultural Water Management, 2001, 47, 1, 69.
No abstract is available for this item.
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Damage potential and reproduction of Heterodera avenae on wheat and barley under Saudi field conditions.
Academic Journal
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Nematology; Oct99, Vol. 1 Issue 6, p625-630, 6p
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Ibrahim, Ahmed A. M.;Al-Hazmi, Ahmad S.;Al-Yahya, Fahad A.;Alderfasi, Ali A...
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Nematology; Oct99, Vol. 1 Issue 6, p625-630, 6p
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This study was conducted to determine the effect of H. avenae initial population densi...
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Damage potential and reproduction of Heterodera avenae on wheat and barley under Saudi field conditions.
Nematology; Oct99, Vol. 1 Issue 6, p625-630, 6p
This study was conducted to determine the effect of H. avenae initial population densities (Pi) on the yield of wheat (two growing seasons) and barley (one season) and on nematode reproduction, under Saudi field conditions. At increasing Pi, H. avenae suppressed (P lessequal 0.05) the number of spikes, weight of spikes, weight of 1000 kernels, grain yield and straw yield of wheat and barley. Grain yields were reduced by 40 to 92% for wheat (during the two seasons) and 17 to 77% for barley. Straw yields were also reduced, by 50 to 85 for wheat and 30 to 77% for barley. As Pi increased, final populations of H. avenae increased (P lessequal 0.05) on both hosts, but the nematode reproduction factor (Rf) decreased. Significant negative linear regressions were obtained between H. avenae Pi and grain yield of wheat and barley. Final populations (Pf) were positively correlated with Pi on wheat and on barley. Rf was negatively correlated with Pi on wheat and barley. Schadigungspotential und Vermehrung von Heterodera avenae an Weizen und Gerste unter Freilandbedingungen in Saudiarabien - Die vorliegende Untersuchung wurde durchgefuhrt, um die Wirkung unterschiedlicher Ausgangspopulationen (Pi) von Heterodera avenae auf den Ertrag von Weizen (zwei Vegetationsperioden) und Gerste (eine Vegetationsperiode) sowie auf die Vermehrung der Nematoden unter saudiarabishen Freilandbedingungen zu ermitteln. Bei steigender Pi verminderte (P lessequal 0.05) H. avenae die Anzahl der Ahren, das Ahrengewicht, das Tausendkorngewicht, den Korn- und den Strohertrag von Weizen und Gerste. Die Kornertrage wurden bei Weizen (zwei Vegetationsperioden) um 40-92% vermindert, bei Gerste um 17-77%. Auch die Strohertrage gingen zuruck, bei Weizen um 50-85% und bei Gerste um 30-77%. Mit zunehmender Pi stiegen die Endpopulationsdichten von H. avenae bei beiden Wirtspflanzen an (P lessequal 0.05), doch nahm der Vermehrungsfaktor (Rf) der Nematoden ab. Zwischen Pi von H. avenae und dem Kornertrag von Weizen und Gerste wurden signifikante negative Regressionen erhalten. Die Endpopulationen (Pf) waren an Weizen und Gerste positiv korreliert mit Pi. Rf war an Weizen und Gerste negativ korreliert mit Pi. [ABSTRACT FROM AUTHOR]