scholarly journals EFFECT OF WATER STRESS ON YIELD AND YIELD COMPONENTS OF BREAD WHEAT GENOTYPES.

2017 ◽  
Vol 48 (3) ◽  
Author(s):  
Mohammed & Kadhem
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Bread Wheat ◽  
Yield Components ◽  
Block Design ◽  
Research Station ◽  
Stress Treatment ◽  
Wheat Genotypes ◽  
Effect Of Water ◽  
Yield And Yield Components

A field experiment was conducted during 2014 -2015 and 2015-2016 seasons at the  Field Crops Research Station Abu Ghraib, to study the effect of water stress, on yield and yield components of  bread wheat genotypes .The water stress treatment were 25% (S1) and 75% (S2) depletion of soil available water . The experiments was conucted using a split plot with in arrangement Randomized Complete Block Design with three replications. Water stress treatments were assigned to the main-plot, while, 27 wheat genotypes  were assigned to sub-plots. The results indicated that water stress treatment (S2)  significantly decreased  the number of spikes m-2,  number of grain.spike-1, 1000 grain weight and grain yield. The genotypes showed a differences in all characters studied. The genotype 26 produced the highest number of spikes m-2(355.8) and did not significantly differ from Bohooth10 347.2 spike.m-2.The Bohooth10 gave highest in the number of grain spike-1 (62.07) . The genotype 25 produced the highest weight of 1000 grains (40.05,37.09 gm)The genotype 26 produced highest grain yield (6.117 and 5.074 ton h-1 ) for two seasons, respectively but differed significantly from IPA99 which gave lowest  grains yield ( 3.395 and 3.020 Tun.h-1) for two seasons respectively.

scholarly journals Changes in Yield and Yield Components of Wheat Cultivars under Water Stress Condition

2015 ◽  
Vol 9 (5) ◽  
pp. 103-107 ◽  
Author(s):  
Amin Farnia ◽  
Amin Tork
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Water Deficit ◽  
Yield Components ◽  
Block Design ◽  
Irrigation Treatment ◽  
Dry Weight ◽  
Wheat Cultivars ◽  
Water Stress Condition ◽  
Yield And Yield Components

A field experiment was laid out in order to evaluation of effects water stress on yield and yield components of wheat cultivars in Lorestan province in Islamic Azad University, Boroujerd branch, Iran at 2014. The experiment was laid out in a split-plot design based on randomized block design with three replications. Treatments were irrigation in five levels such as 1: four period irrigation after anthesis, 2: three period irrigation after anthesis, 3: two period irrigation after anthesis, 4: one period irrigation after anthesis and 5: control in main plots and  three wheat cultivars (Shiraz, Pishtaz and Bahar) in sub plots.  The results showed that, the effect of water stress, cultivar and interaction between them on all parameters were significant at 1% level. The height of Pishtaz cultivar was taller than other cultivars. The Pishtaz cultivar with one period irrigation after anthesis had the highest number of spike per square and Bahar cultivar with one period irrigation after anthesis had the lowest number of spike per square. However, 1000- grainwas decreased in water deficit treatment.  However, the Pishtaz cultivar with four period irrigation had the highest plant dry weight and grain yield and Bahar cultivar non irrigation treatment after anthesis had the lowest plant dry weight and Shiraz cultivar in non-irrigation treatment had the lowest grain yield. The results showed that yield and yield components of common wheat decreased with increasing of water deficit and for increasing in grain yield of wheat complete irrigation are needed. However, Pishtaz cultivar had a highest grain yield and dry matter production. Then we can increase grain yield and production of wheat with cultivation of Pishtaz cultivar and avoid of water stress.DOI: http://dx.doi.org/10.3126/ijls.v9i5.12707

scholarly journals Potentiality of Some Egyptan Cotton Varieties under Drought Stress Conditions

2019 ◽  
pp. 1-7
Author(s):  
M. D. H. Dewdar
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Yield Components ◽  
Block Design ◽  
Stress Conditions ◽  
Yield Potential ◽  
High Yield ◽  
Stress Treatment ◽  
Irrigation Regimes ◽  
Yield And Yield Components

This study aimed to investigate the performance of three cotton (Gossypium barbadense L.) genotypes as affected by drought stress at three irrigation regimes; 14 (S-0), 21(S-1) and 28 (S-2) days that were started after the first irrigation. To achieve this goal, a field experiment was conducted as split block design at the Experimental Farm of the Faculty of Agriculture, El-Fayoum Univ. The results indicated that the irrigation regimes mean squares of combined data were highly significant for earliness traits, also as well as yield and yield components.  Most of fiber properties were not affected by water stress conditions. Significant differences were found among the non- stress (S-0) and the stress treatments (S-1 and S-2) for mean performances of the three earliness traits. Treatment S-2 led to significant decrease in yield and yield components compared to S-0. The results showed that Giza 85 variety gave the highest fiber length, fiber strength and was finer cultivars having the lower micronaire values. The interaction between genotypes and stress treatments was significant for most traits.G1,G2 and G3 cotton varieties  exhibited highest seed cotton yield kg ha-1 (yield potential) in the non- stress treatment (S-0).  Giza 90 variety outyielded the other two varieties under stress treatment (S-2) compared to those of Giza 85 and Giza 83. The superiority of Giza 90 variety could be attributed to its high yield components., while Giza 90 was relatively stress susceptible and similar trend of those obtained using data of relative productivity (%) which confirm that the genotype Giza 83 and Giza 85 are more drought tolerance and could be used as sources of drought stress tolerance in breeding programs and tolerance to water stress conditions.

The Performance of Ten Bread Wheat Genotypes Associated with Yield and Yield Components under Water Stress Conditions

2014 ◽  
Vol 18 (3) ◽  
pp. 415-428
Author(s):  
E. M. S. Gheith ◽  
M. A. Abd El-Shafi ◽  
A. A. Abd El-Mohsen ◽  
H. S. Suleiman
Keyword(s):  
Water Stress ◽  
Bread Wheat ◽  
Yield Components ◽  
Stress Conditions ◽  
Wheat Genotypes ◽  
Yield And Yield Components

scholarly journals Gram Yield and Yield Components of Spring Wheat Genotypes at Different Moisture Regimes

1998 ◽  
Vol 3 (2) ◽  
pp. 13
Author(s):  
R. Ahmad ◽  
N. Ahmad ◽  
J.C. Stark ◽  
A. Tanveer
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Spring Wheat ◽  
Yield Components ◽  
Irrigation System ◽  
Stress Conditions ◽  
High Plasticity ◽  
Wheat Genotypes ◽  
Yield And Yield Components ◽  
High Yields

Yield and developmental characteristics of crop genotypes grown at different levels of water availability are often used to select genotypes that are adapted to variable moisture environments. Field studies were conducted at Aberdeen. Idaho, USA in 1992 and 1993 to evaluate the effects of varying moisture supply on grain yield and yield components of spring wheat genotypes. In both years, 12 spring wheat (Triticum aestivum L.) genotypes were grown under three irrigation levels (well-watered. moderate water-stress and severe water-stress) imposed during the periods from mid-tillering to anthesis with a line source sprinkler irrigation system. Grain yield and yield components (spikes m-2, spikelets spike-1, kernels spikelet-1,  kernels spike-1, and kernel weight) were used to evaluate the genotypic response to water stress. Overall, water stress caused a reduction in grain yield and yield components. Genotypes exhibited a large year-to-year variation in their ranks for grain yield. Medium-tall growing genotypes (IDO 367. lDO 369 and Rick) generally produced high yields under water stress conditions in 1992 (relatively dry year), while short -medium genotypes (WPB 926. Yecora Rojo and Pondera) produced high yields under water stress conditions in 1993 (relatively wet year). Chris and Serra were the lowest yielding genotypes under water stress conditions in both years. Under moderate stress conditions. 100 367 and Yecora Rojo had consistently high yields. Genotypic yield differences under water stress conditions were primarily related to the differences in the numbers of spikes m". Therefore, a tendency for high plasticity for Spikes per unit area could be used to select wheat genotypes for improved drought tolerance.

scholarly journals Genetic variability and association of yield and yield components among bread wheat genotypes under drought-stressed conditions

2021 ◽  
pp. 863-870
Author(s):  
Yared Semahegn ◽  
Hussein Shimelis ◽  
Mark Laing ◽  
Isack Mathew
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Bread Wheat ◽  
Yield Components ◽  
Agronomic Traits ◽  
Genetic Advance ◽  
Wheat Cultivars ◽  
Wheat Genotypes ◽  
Lattice Design ◽  
Yield And Yield Components

Drought is one of the major constraints to wheat production and productivity globally. Developing drought-adapted wheat cultivars is paramount to increase wheat productivity under variable rainfall conditions. Understanding the genetic variability and trait association is key to the development of improved wheat cultivars. The objective of this study was to determine the extent of the genetic parameters and associations of yield and yield components of bread wheat genotypes, in order to design appropriate breeding strategies for yield improvement in wheat. One hundred and twenty genotypes were evaluated at five test sites in the 2018/19 cropping season using a 10 x 12 alpha lattice design with two replications. Different sowing dates were used to impose contrasting drought stress levels based on the onset of the main seasonal rains at each site. Data were recorded on agronomic traits such as days to heading (DH), days to maturity (DM), plant height (PH), spike length (SL), spikelet per spike (SS), kernel per spike (KS), 1000 kernel weight (TKW) and grain yield (GY). There was significant (p<0.01) genetic variation for all agronomic traits studied under both drought-stressed and non-stressed conditions. The highest estimates for genetic variance were obtained for DH (54.0%), followed by SL (38.3%). The high heritability estimated for DH (94.4%), SL (90.2%) and SS (85.2%), coupled with a high rate of genetic advance, suggest that direct selection for these traits would be effective under drought-stressed conditions. GY exhibited low genetic advance (9%) and heritability (41.5%) estimates, which were concomitant with its polygenic and complex inheritance pattern. Correlation and path analyses revealed that TKW was the most important contributing trait for improving grain yield under drought-stressed conditions

scholarly journals Effect of Nitrogen and Potassium on Yield, Yield Components and Essential Oil of Black Caraway (Bunium Persicum L.)

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Hamidreza Zabihi ◽  
Mojtaba Nourihoseini
Keyword(s):  
Essential Oil ◽  
Grain Yield ◽  
Yield Components ◽  
Block Design ◽  
Research Station ◽  
Potassium Fertilizer ◽  
Straw Yield ◽  
Bunium Persicum ◽  
Yield And Yield Components ◽  
Main Factor

Fertilization is the main factor stimulating yield of plants, nitrogen and potassium are among must important essential nutrients. An experiment was conducted to investigate the effect of different rates of nitrogen and potassium on yield and yield components of Black caraway (Bunium persicum L.). The experiment  was on the  base of randomized complete block design with three replications  for 3 years in Torogh agriculture and natural resources research station, iran. Plow, disc, leveling, creating planted rows and making plots was performed in mid-September. All potassium fertilizer and half of the nitrogen were applied at planting. The rest of the nitrogen was applied in the form of top-dressing at flowering stage in the second week of April. The size of each experimental plot was 4 × 3 meters in 6 rows and 12 lines.    Treatments were 4 levels of nitrogen (0,40,80and120 kgN/ha in the form of urea), and three levels of potassium (0, 40 and 80 kg k2O/ha in the form of sop). The results showed that the effect of nitrogen and potassium on grain yield, yield components, straw yield and essential oil content was significant (P<0.05). Nitrogen rate of 40 kg/ha increased grain yield and some yield components and essential oil. Whereas the higher rate decreases grain yield and yield components, and increases  straw yield. Interaction of nitrogen and potassium on grain yield, straw yield and number of umbels per plant, was significant(P<0.05).

scholarly journals Effects of Nitrogen on Yield and Yield Components of Wheat (Triticum aestivum L.) under NPSB Blended Fertilizer in Tsegedie and Welkait Districts Westren Zone Tigray, Ethiopia

2020 ◽  
pp. 31-38
Author(s):  
Negasi Gebreslasie ◽  
Teame Shimgabr ◽  
Haile Alene ◽  
Nebyu Tsegay ◽  
Welesenbet Haftu
Keyword(s):  
Grain Yield ◽  
Soil Properties ◽  
Bread Wheat ◽  
Yield Components ◽  
Block Design ◽  
Wheat Yield ◽  
Negative Control ◽  
Marginal Rate ◽  
Yield And Yield Components ◽  
Study Sites

Decisions concerning optimum rates of fertilization directly involve fitting some type of rates to yield when several rates of fertilizer are tested. This study was carried out to investigate the effects of nitrogen fertilizer rates yields and yield components of bread wheat and determine optimum rate of N. The field experiment was carried out in 2016 and 2017 main cropping season at Tsegedie and Welkait districts in Western Tigray Regional State, Ethiopia. The experiment consists of seven levels of nitrogen (0, 23, 46, 69, 99, 115 and 138 kg ha-1) arranged in randomized completed block design with three replications. Nitrogen was applied splits, half at planting and remaining at tiller stage. NPSB was applied as basal application for all experimental plots except the negative control. Soil samples were collected before planting for analysis of some selected physicochemical properties. The soil properties of the experimental sites of the two districts varied in most of the soil properties. Application of nitrogen significantly influenced grain yield and yield components of wheat in both study sites. The highest grain yield 3926 kg ha-1 and 2131 kg ha-1 were obtained from 138 kg N ha-1 and 115 kg N ha-1 at the study sites of Tsegedie and Welkait districts, respectively. Highest marginal rate of returns were however obtained at nitrogen rates of 46 kg ha-1 and 23 kg ha-1 at Tsegedie and Welkait districts, respectively. Hence, it could be concluded that the use of N at 46 kg ha-1and 23 kg ha-1 with 100 kg NPSB fertilizer could give optimum bread wheat yield at Tsegedie and Welkait districts, respectively.

scholarly journals Evaluation of Urea Super Granule as a Source of Nitrogen in Transplant Aman Rice

2014 ◽  
Vol 24 (1-2) ◽  
pp. 29-37 ◽  
Author(s):  
TA Qurashi ◽  
MA Salam ◽  
M Jannat ◽  
MG Rabbani
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Block Design ◽  
Prilled Urea ◽  
Randomized Complete Block Design ◽  
Yield And Yield Components ◽  
Use Efficiency ◽  
Experimental Treatments ◽  
N Management ◽  
1000 Grain Weight

An experiment was carried out at Bangladesh Agricultural University, Mymensingh to evaluate the effect of urea super granule (USG) as a source of nitrogen on the yield and yield components of transplant Aman rice cv. BRRI dhan39, BRRI dhan46 and BINA dhan7. Five levels of N (viz., 0, 60, 120 kg ha-1 as prilled urea and 60 and 120 kg ha-1 as USG) were taken as experimental treatments. The experiment was laid out in a randomized complete block design with three replications. Plant height, effective tillers hill-1, grains panicle-1 and grain yield varied significantly due to different cultivars. All the yield and yield components except 1000-grain weight were influenced significantly by the levels of nitrogen fertilizer. The highest grain yield (4.82 t ha-1) was recorded in BINA dhan7 and the lowest one (4.30 t ha-1) was recorded in BRRI dhan39. Nitrogen @ 120 kg ha-1 as USG performed the best among the treatments in respect of yield and yield components of rice. The highest grain yield (5.46t ha-1) was obtained from BINA dhan7 with 120 kg N ha-1 as USG which was statistically identical with 60 kg N ha-1 as USG. A considerable amount (31.25%) of prilled urea (PU) nitrogen could be saved by using USG. It may be concluded that USG could be used as N management to achieve better nitrogen use efficiency in reducing N loss than the PU.DOI: http://dx.doi.org/10.3329/pa.v24i1-2.19095 Progress. Agric. 24(1&2): 29 - 37, 2013

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