Yield Performance Of Wheat Research Articles

Physiological responses, ion accumulation and yield performance of wheat (Triticum aestivum L.) to salt stress

Wheat is affected by various biotic and abiotic stresses, especially salinity, which reduces the growth and yield drastically. High salinity is a major constraint for wheat productivity in many countries, including Bangladesh. With this view, here, an experiment was conducted to observe genotypic differences in physiological, ion accumulation, agro-morphological and yield performance of wheat against different levels of salinity. Experimental variables consisted of five salt tolerant genotypes (G 20–2–2, G 20–1–2, G 13–2, G 22–2, G 9–2), one susceptible genotype (G 24–2) and one standard check variety (BARI ghom 25), which assigned to four levels of salinity with electrical conductivities control (0.3), 4, 8 and 12 dS m−1. Irrespective of genotypes, salinity stress significantly decreased the yield and yield attributes. Results of analyses based on salt tolerance indices of plant growth related and yield contributing parameters, ionic balance (Na+, K+ and Na+ /K+ ratio), and stress indicators such as chlorophyll content, photosynthetic rate (Pn), stomatal conductance (gs) and transpiration rate (Tr) revealed genotypes G 20–2–2, G 13–2 and G 20–1–2 as salt tolerant, genotype G 9–2 as moderately salt-tolerant and G 24–2 and G 22–2 as salt-sensitive genotypes. Additionally, lower accumulations of hydrogen peroxide and malondialdehyde, and higher activities of antioxidant enzymes in the salt-tolerant genotypes G 20–2–2 and G 13–2 than in the salt-sensitive genotype G 24–2 indicated reduced oxidative damage in genotypes G 20–2–2 and G 13–2 relative to that in genotype G 24–2. Collectively, our findings suggest that the optimum growth and yield of salt tolerant genotypes are associated with decreased Na+/K+ ratio, increased antioxidant enzymes activity and reduced oxidative stress.

Comparative analysis of wheat and barley yield performance across temperate environments

ContextA comparative analysis of grain yield performance of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) under different environments constitutes a way to identify restrictions in yield formation between both crop species. However, most of the previous studies on these field crops have been carried out in Mediterranean environments. ObjectiveThis study aims to compare the grain yield performance of wheat and barley across a wide range of temperate environmental conditions. MethodsWheat and barley yield databases from the national network of cultivar evaluation of Argentina were assembled. The database included 191 wheat cultivars (with early-, mid- and late-flowering length cycle), 140 barley cultivars, and 44 combinations of sites and years of the Argentine wheat and barley belt region. Average heading date variation among environments and crops was no more than 10 days. Crop grain yield comparisons were carried out using a regression analysis, benchmarking within each site-year the grain yield of each cultivar against the average grain yield of all crop cultivars (i.e., environmental index). ResultsThere were no differences in grain yield between wheat and barley for all data, but the behavior between crop species changed with the length of the wheat cycle (i.e., early-, mid-, or late-flowering cultivars). Barley portrayed a greater grain yield than early-flowering wheat under low-yielding environments (< 6060 kg ha−1), but this advantage vanished as the yield environment improved. Mid-flowering wheat showed a similar grain yield to barley across temperate environments. Lastly, late-flowering wheat outperformed barley mainly in high-yielding environments (> 6138 kg ha−1). Grain number m−2 was the main numerical component that explained variability in grain yield. The relative contribution of the yield numerical components differed between species, having barley lower grain number m−2 but a greater grain weight than wheat. ConclusionsThe comparison of the grain yield performance between species represents a strategy to adjust the rotation system, being a critical factor in considering the variability in the crop growth cycle.

Effect of Integrated Weed Management on the Yield Performance of Wheat

The objectives of this study were to determine the influence and comparative efficiency of different weed management practices under integrated weed management of wheat. The experiment comprised three replication group which composed of fourteen weeding regime treatments, namely, unwedded, Mulching by rice straw, Mulching by water hyacinth , Two hand weeding at 25 and 35 DAS, Pre-emergence herbicide, Pre-emergence herbicide + hand weeding at 35 DAS, Pre-emergence herbicide + mulching by water hyacinth, Post-emergence herbicide, Stale seed bed + post-emergence herbicide, Post-emergence herbicide + hand weeding at 35 DAS, Post-emergence herbicide + mulching by rice straw, Post-emergence herbicide + mulching by water hyacinth, Pre-emergence herbicide + Post-emergence herbicide, Pre-emergence herbicide + Post-emergence herbicide + hand weeding at 35 DAS. The experiment was laid out in a randomized complete block design. Data on different parameters were recorded. Most of the yield contributing characters significantly higher at post-emergence herbicide + mulching by rice straw. Among different weeding regime treatments, the highest grain yield (6.92 t ha-1) of post-emergence herbicide + mulching by rice straw compared to unwedded treatment. This result indicates that post-emergence herbicide + mulching by rice straw regime gave higher yield in Agronomy Field Laboratory at BAU.

Growth and yield performance of wheat (Triticum Aestivum L.) As influenced by combined application of naa and n-fertilizer in two sowing time

Growth and yield performance of wheat (Triticum Aestivum L.) As influenced by combined application of naa and n-fertilizer in two sowing time

USE OF HERVICIDES FOR WEED CONTROL AND THEIR EFFECTS ON YIELD PERFORMANCE OF WHEAT (Triticum aestivum L)

This experiment was carried out in the research farm of the Regional Wheat Research Institute, Shampur, Rajshahi during the period from November last week 2019 to April first week 2020 in order to the find out “USE OF HERVICIDES FOR WEED CONTROL AND THEIR EFFECTS ON YIELD PERFORMANCE OF WHEAT (Triticum aestivum L) .’’ Wheat sown both conventional and strip method. In this research yield and yield contributing characters were found and maximum wheat production observed by under strip tillage method (4.48 t/ha). In randomized complete block design (RCBD) with three replications in both tillage systems with some herbicides were tested for weed control treatment. The maximum number of effective and total tiller per meter square, 1000 grain weight, were observed in T4(Affinity, BD.) herbicides for weed control treatment. As a result, maximum grain yield was obtained in T4 treatment. The 2nd maximum yield was recorded in T6 (Axial + Affinity, India) herbicides for weed control treatment. The lowest grain and other yield contributing characters were found in T9 (Weedy check) condition. The effect of interaction between different method of cultivation and weed control treatment were insignificant for all yield and yield contributing characters except plant height, grain yield and straw yield.

Effect of Row Ratio and Planting Methods on Growth, Water Use Efficiency, Yield and Economics of Wheat (Triticum aestivum L.) and Mentha (Mentha arvensis L.)

This study examines the intercropping system of wheat and mentha involves the simultaneous cultivation of two or more crops on the same piece of land for higher land productivity. Japanese mint, a member of the Lamiaceae family, has a potent essential oil. Oil extracted from the leaves for use in aromatherapy, food flavouring, and medicine. Hence, a field experiment was conducted to study the effect of Row ratio and Planting methods on Growth, Yield Performance of wheat (Triticum aestivum L.) and Mentha (Mentha arvensis L.) was conducted during 2016-17 at the Soil Conservation and Water Management Farm to investigate the response of mentha when intercropped with wheat under various row ratio and planting methods. The experiment was laid out in Randomized Block Design (RBD) with three replication keeping one variety of Mentha ‘Shivalik’&amp; Wheat ‘Unnat Halna’. The experiment consisting of nine treatments are T1: Sole Mentha direct sowing (50cm apart), T2: Sole Mentha transplanting (50cm apart), T3: Sole Wheat (25cm apart), T4: Wheat+Mentha (d, 1:1), T5: Wheat+Mentha (t, 1:1), T6:Wheat+Mentha (d, 2:2), T7:Wheat+Mentha (t, 2:2), T8: Wheat Paired+Mentha (d, 2:3), T9: Wheat Paired+Mentha (t, 2:3). The results indicated that Sole Wheat (T3) had the highest plant population (662.40 initially, 326 final), plant height (83.80 cm), and grain yield (39.80 q/ha) for wheat. In the case of mentha, Wheat Paired+Mentha (T8) exhibited the maximum final plant population (119.43), plant height (72.51 at maturity), and equivalent oil yield (189.05 l/ha). Wheat Paired+Mentha (T8) also recorded the highest total water use (647 mm), water use efficiency (0.292 kg/ha/mm of water), land equivalent ratio (1.50), and economic parameters such as gross return (228,868), net return (160,828), and B:C ratio (3.36). The maximum oil yield (163.35 l/ha) was found in Sole Mentha direct sowing (T1).

CropQuant-Air: an AI-powered system to enable phenotypic analysis of yield- and performance-related traits using wheat canopy imagery collected by low-cost drones.

As one of the most consumed stable foods around the world, wheat plays a crucial role in ensuring global food security. The ability to quantify key yield components under complex field conditions can help breeders and researchers assess wheat's yield performance effectively. Nevertheless, it is still challenging to conduct large-scale phenotyping to analyse canopy-level wheat spikes and relevant performance traits, in the field and in an automated manner. Here, we present CropQuant-Air, an AI-powered software system that combines state-of-the-art deep learning (DL) models and image processing algorithms to enable the detection of wheat spikes and phenotypic analysis using wheat canopy images acquired by low-cost drones. The system includes the YOLACT-Plot model for plot segmentation, an optimised YOLOv7 model for quantifying the spike number per m2 (SNpM2) trait, and performance-related trait analysis using spectral and texture features at the canopy level. Besides using our labelled dataset for model training, we also employed the Global Wheat Head Detection dataset to incorporate varietal features into the DL models, facilitating us to perform reliable yield-based analysis from hundreds of varieties selected from main wheat production regions in China. Finally, we employed the SNpM2 and performance traits to develop a yield classification model using the Extreme Gradient Boosting (XGBoost) ensemble and obtained significant positive correlations between the computational analysis results and manual scoring, indicating the reliability of CropQuant-Air. To ensure that our work could reach wider researchers, we created a graphical user interface for CropQuant-Air, so that non-expert users could readily use our work. We believe that our work represents valuable advances in yield-based field phenotyping and phenotypic analysis, providing useful and reliable toolkits to enable breeders, researchers, growers, and farmers to assess crop-yield performance in a cost-effective approach.

The Chlorophyll Fluorescence Parameter Fv/Fm Correlates with Loss of Grain Yield after Severe Drought in Three Wheat Genotypes Grown at Two CO2 Concentrations.

Three genotypes of wheat grown at two CO2 concentrations were used in a drought experiment, where water was withheld from the pots at anthesis until stomatal conductance (gs) dropped below 10% of the control and photosynthesis (A) approached zero. The genotypes had different leaf area (Gladius < LM19 < LM62) and while photosynthesis and shoot growth were boosted by elevated CO2, the water use and drying rate were more determined by canopy size than by stomatal density and conductance. The genotypes responded differently regarding number of fertile tillers, seeds per spike and 1000 kernel weight and, surprisingly, the largest genotype (LM62) with high water use showed the lowest relative decrease in grain yield. The maximum photochemical efficiency of photosystem II (Fv/Fm) was only affected on the last day of the drought when the stomata were almost closed although some variation in A was still seen between the genotypes. A close correlation was found between Fv/Fm and % loss of grain yield. It indicates that the precise final physiological stress level measured by Fv/Fm at anthesis/early kernel filling could effectively predict percentage final yield loss, and LM62 was slightly less stressed than the other genotypes, due to only a small discrepancy in finalising the drying period. Therefore, Fv/Fm can be used as a proxy for estimating the yield performance of wheat after severe drought at anthesis.

Yield Performance of Wheat Under Different Practices of Tillage and Integrated Inorganic and Organic Fertilizers

Tillage management and fertilizer application are important components of wheat plant growth and productivity. Yet limited data are available on the consequences of simultaneous tillage and integrated fertilization on wheat production and soil chemical characteristics in the heavy soil of Sothern parts of Iraq. Hence, split-split plots were used to conduct a field experiments at two locations. The primary plots were divided into three tillage techniques that are no tillage (NT), tine cultivator (TC) and moldboard plow (MP). Five selected combinations of organic and inorganic nutrient sources were arranged in sub plots including the traditional chemical fertilizer application of nitrogen, phosphorus and potassium (CF), farm yard manure (FYM), poultry manure (PM), 50% CF+FYM and 50% CF+PM application, in addition to control treatment, and three wheat cultivars (Al-Rasheed, IPA-99 and Abu Ghraib-3) were allocated to sub-sub plots. The results showed positive superiority of MP and TC in the growth parameters, yield components, wheat yield and some soil properties at both experimental locations. Likewise, the MP and TC had the lowest bulk density, while MP had the lowest electrical conductivity and the highest soil pH. The results also revealed that organic and inorganic amendments affected plant growth, yield components, grain yield significantly. The 50% CF+PM and 50% CF+FYM gave significantly higher thousand grain weight, spikes number at the 2nd location, wheat yield, and tillers per square meter at the 2nd location. Furthermore, soil bulk density, pH and electrical conductivity were significantly affected by all organic and inorganic treatments. The results also indicated that the highest spikes number, grain yield, chlorophyll content SPAD were recorded by IPA-99 cultivar at both locations. Moreover, under experiment conditions, the flag leaf chlorophyll content was significantly related to grain yield.

Effect of silicon fertilization on wheat productivity and profitability in Southern Rajasthan

Area under organic cultivation of wheat (Triticum aestivum L.) is increasing in India. The present two-year study was carried out during 2017–18 and 2018–19 to observe the yield performance of wheat with application of silicon solution (amorphous silica SiO2) under sub-humid conditions of southern plains and Aravalli Hills of Rajasthan. Factorial RBD with five levels of silicon concentration and three growth stages, viz. CRI, tillering and jointing stages were replicated thrice during rabi season of 2017–18 and 2018–19 at Udaipur, Rajasthan, India. Results revealed that application of silicon 8 g/litre water at tillering stage proved significantly superior in enhancing growth characteristics, yield attributes, yield and also gave maximum net returns of 110281/ha and B:C ratio of 2.32

Performance of a wheat–soybean cropping system as affected by applying phosphogypsum in combination with urea

High-intensity crop-production seeking for higher grain yields increases nutrient demand by plants. A field experiment was performed in Parana State, Brazil, on a clayey Haplic Cambisol to evaluate the effects of phosphogypsum and nitrogen (N) amendments on a wheat–soybean rotation. Phosphogypsum was surface-applied to plots at 0, 2, 4, and 6 Mg ha−1 before wheat sowing and two rates of urea at 40 and 80 kg N ha−1 were applied to subplots in top dressing at tillering of wheat. Phosphogypsum improved the yield performance of wheat–soybean rotation. Wheat grain yield increased by 20% due to phosphogypsum application only when a higher rate of urea at 80 kg N ha−1 was applied in top dressing, indicating an influence of the interaction between N and sulfur (S). Soybean grain yield increased by 16% with phosphogypsum application, regardless of the urea-N rates to the previous wheat crop. Higher grain yields of wheat and soybean were related to higher levels of Ca2+ and S in the soil profile (0–0.40 m). Although there was a slight involvement of phosphogypsum in reducing aluminum Al3+ toxicity in the subsoil due to a reduction in Al3+ saturation caused by increased Ca2+ concentration, the improvements imparted by the use of phosphogypsum resulted mainly from increased S concentration. The results showed that the critical levels of SO4–S by 0.01 mol L−1 Ca(H2PO4)2 were 14 and 27 mg dm−3 at 0–0.20 m and 0–0.40 m depths, respectively, for the wheat–soybean cropping system.

Optimizing the Seed Rate for Maximized Yield And Benefits of Wheat Under Strip Tillage In Bangladesh

An on-farm experiment was conducted at the farmer's field located at the Durbachara village of Gauriopur upazilla under the Mymensingh district of Bangladesh from November 2015 to March 2016 to study the effect of seed rate on yield performance of wheat under strip tillage. Wheat cv. BARI Gom-26 was sown under conventional tillage (CT) vs. strip tillage (ST), including four seeding rates viz. 100, 110, 120, and 130 kg ha-1. The CT was done with a two-wheel tractor and consisted of two primary tillages followed by two secondary tillages. The ST was done using a Versatile Multi-crop Planter (VMP) machine in a single pass process. A pre-plant herbicide, glyphosate was applied 3 days before of ST operation @ 3.7 L ha-1. The experiment was laid out in a randomized complete block design with four replications. The impact of tillage methods on the seed rate was found significant in the yield and economic profit of wheat. The longest spike with the highest number of grains spike-1, the highest weight of 1000-grain, grain yield, and BCR was recorded when 120 kg seeds of wheat sown with strip tillage. This practice produced a 25% higher yield and earned 51% higher profit than the practice of seeding 100 kg seeds ha-1 with conventional tillage. SAARC J. Agric., 19(1): 45-56 (2021)

Photosynthetic and yield performance of wheat (Triticum aestivum L.) under sowing in hot environment

Photosynthetic and yield performance of wheat (Triticum aestivum L.) under sowing in hot environment

Elevated CO2 modulates the effect of heat stress responses in Triticum aestivum by differential expression of isoflavone reductase-like (IRL) gene.

Two wheat genotypes forming high and low biomass (HB and LB), exhibiting differential expression of an isoflavone reductase-like (IRL) gene, and resulting in contrasting grain yield under heat stress field conditions, were analyzed in detail for their responses under controlled heat and elevated CO2 conditions. Significant differences in IRL expression between the two lines were hypothesized to be the basis of their differential performance under the tested conditions and their stress tolerance potential. By a holistic approach integrating advanced cell physiological phenotyping of the antioxidative and phytohormone system in spikes and leaves with measurements of ecophysiological and agronomic traits, the genetic differences of the genotypes in IRL expression were assessed. In response to heat and elevated CO2, the two genotypes showed opposite regulation of IRL expression, which was associated with cytokinin concentration, total flavonoid contents, activity of superoxide dismutase, antioxidant capacity and photosynthetic rate in leaves and cytokinin concentration and ascorbate peroxidase activity in spikes. Our study showed that IRL expression is associated with wheat yield performance under heat stress at anthesis, mediated by diverse physiological mechanisms. Hence, based on our results, the IRL gene is a promising candidate for developing genetic markers for breeding heat-tolerant wheat.

Co-inoculation and inoculation methods of plant growth-promoting bacteria in wheat yield performance

Several studies have reported the beneficial effects of inoculation of Azospirillum brasilense in wheat, but only a few of them have related the co-inoculation of A. brasilense and Rhizobium sp. and the evaluation of different inoculation methods. This study aimed i) to verify the efficiency of plant growth-promoting bacteria (PGPB) in subtropical environments, ii) to verify the efficiency of co-inoculation of A. brasilense and Rhizobium sp., and iii) to verify the efficiency of the management of different inoculation methods in the wheat crop. The experiments were carried out in Londrina and Apucarana, State of Paraná, Brazil, under a complete randomized block design, with four replications and nine treatments: T1) absence of nitrogen (N) topdressing, T2) 30 kg ha−1 of N topdressing, T3) 60 kg ha−1 of N topdressing, T4) A. brasilense Ab-V5 in the seeds, T5) A. brasilense Ab-V5 in post-emergence, T6) A. brasilense Ab-V5 + Rhizobium sp. 53GRM1 in the seeds, T7) A. brasilense Ab-V5 + Rhizobium sp. 53GRM1 in post-emergence, T8) commercial inoculant (A. brasilense Ab-V5 + Ab-V6) in the seeds, and T9) commercial inoculant (A. brasilense Ab-V5 + Ab-V6) in post-emergence. The number of ears per linear meter, number of spikelets, number of grains per spikelet, number of grains per ear, thousand-grain weight, number of spikelets to ears ratio, leaf nitrogen content, and grain yield were evaluated. Leaf N content and yield components showed no alterations due to the inoculation and co-inoculation performed both in the seed and in the post-emergence of seedlings. Treatments T3, T7, and T9 showed the highest means of grain yield (2077.50, 1743.12, and 1660.62 kg ha−1, respectively), demonstrating that co-inoculation with A. brasilense Ab-V5 + Rhizobium sp. 53GRM1 and inoculation with A. brasilense Ab-V5 + Ab-V6, both in post-emergence of seedlings, have the potential to replace the topdressing nitrogen fertilization in wheat.

Growth and Yield Performance of Wheat (Triticum aestivum L.) to under Water Stress Conditions

Background: Drought is one of the most important abiotic factors that limit the growth and development of plants all over the world. In Ethiopia, wheat is the second most important crop and occupies third in total production in the African countries. Low productivity as compared to the national production scale is due to water stress. The present work aimed to study the effect of water stress on the growth and yield performance of wheat.Methods: The experiment was conducted in an exceeding greenhouse at East Gojjam Zone, Debre Markos University in 2017-2018 to assess the effects of wheat to water stress applied at different growth stages. The experiment comprised of two water stress treatments, maintained by withholding water at tillering, anthesis and at each stage. Different growth and yield performance data were collected and analyzed by SAS software.Result: Water stress caused a reduction in leaf relative water contents, water potential, osmotic potential, turgor potential, growth and yield components of the wheat. The results indicated that successive stress at growth stages caused a severe reduction in vegetative growth parameters of wheat. Therefore, the results indicated that the high value of relative water content was related to exaggerated yield and its components of crops. The water-stressed treatment has reduced the growth and yield performance of wheat than unstressed treatments. This was due to a reduction in the osmotic activities of plants.

Metabolome Profiling Supports the Key Role of the Spike in Wheat Yield Performance.

Although the relevance of spike bracts in stress acclimation and contribution to wheat yield was recently revealed, the metabolome of this organ and its response to water stress is still unknown. The metabolite profiles of flag leaves, glumes and lemmas were characterized under contrasting field water regimes in five durum wheat cultivars. Water conditions during growth were characterized through spectral vegetation indices, canopy temperature and isotope composition. Spike bracts exhibited better coordination of carbon and nitrogen metabolisms than the flag leaves in terms of photorespiration, nitrogen assimilation and respiration paths. This coordination facilitated an accumulation of organic and amino acids in spike bracts, especially under water stress. The metabolomic response to water stress also involved an accumulation of antioxidant and drought tolerance related sugars, particularly in the spikes. Furthermore, certain cell wall, respiratory and protective metabolites were associated with genotypic outperformance and yield stability. In addition, grain yield was strongly predicted by leaf and spike bracts metabolomes independently. This study supports the role of the spike as a key organ during wheat grain filling, particularly under stress conditions and provides relevant information to explore new ways to improve wheat productivity including potential biomarkers for yield prediction.

Agrobiological characteristics of spelt wheat and intermediate wheatgrass under the conditions of the Right-Bank Forest-Steppe of Ukraine

Agrobiological characteristics of spelt wheat and intermediate wheatgrass under the conditions of the Right-Bank Forest-Steppe of Ukraine

Effects of seed bed types and weed control methods on the vegetative parameters of long cayenne pepper (Capsicum frutesens L)

Effects of seed bed types and weed control methods on the vegetative parameters of long cayenne pepper (Capsicum frutesens L)

Remote sensing techniques and stable isotopes as phenotyping tools to assess wheat yield performance: Effects of growing temperature and vernalization

This study compares distinct phenotypic approaches to assess wheat performance under different growing temperatures and vernalization needs. A set of 38 (winter and facultative) wheat cultivars were planted in Valladolid (Spain) under irrigation and two contrasting planting dates: normal (late autumn), and late (late winter). The late plating trial exhibited a 1.5 °C increase in average crop temperature. Measurements with different remote sensing techniques were performed at heading and grain filling, as well as carbon isotope composition (δ13C) and nitrogen content analysis. Multispectral and RGB vegetation indices and canopy temperature related better to grain yield (GY) across the whole set of genotypes in the normal compared with the late planting, with indices (such as the RGB indices Hue, a* and the spectral indices NDVI, EVI and CCI) measured at grain filling performing the best. Aerially assessed remote sensing indices only performed better than ground-acquired ones at heading. Nitrogen content and δ13C correlated with GY at both planting dates. Correlations within winter and facultative genotypes were much weaker, particularly in the facultative subset. For both planting dates, the best GY prediction models were achieved when combining remote sensing indices with δ13C and nitrogen of mature grains. Implications for phenotyping in the context of increasing temperatures are further discussed.