scholarly journals Influence of sulphur aerosols on physiological, yield and yield attributing of wheat (Triticum aestivum L.) using principal component analysis

2021 ◽  
Vol 22 (3) ◽  
pp. 365-373
Author(s):  
Babithraj Gaddameedi ◽  
Bhagawan Bharali ◽  
Soibam Helena Devi
Keyword(s):  
Total Concentration ◽  
Principal Component ◽  
Triticum Aestivum L ◽  
Yield Potential ◽  
Wheat Crop ◽  
Growth Stages ◽  
Yield Traits ◽  
Spike Initiation ◽  
Total Diversity ◽  
Different Growth Stages

Among several constrains curtailing the yield potential of a crop, lack of proper mineral nutrition in particular sulphur management, a nutrient that is needed in trace amount but essential for plant growth is more alarming. Sulphur is the main source of protein particularly for cereal crop. An experiment was conducted to find out influence of sulphur aerosols on morpho-physiological, yield, and yield traits of wheat. S-aerosols viz., (NH4)2SO4, CaSO4, and K2SO4: @ 300 ppm each (?30 kg N ha-1) along with a control were misted on the plants, on sunny days in the afternoon (after 2–3 P.M.) at three different growth stages i.e. seedling, maximum tillering and spike initiation stages. Therefore, a total concentration of each S-aerosols was 900 ppm ? 0.9%.Genotypes (viz., GW-322, GW-366, GW-273, GW-173, JW-336) were raised both under Pot culture (Expt.1) and field  (Expt.2) observations recorded are : LA, LAI, SLW, Tiller numbers, No. of seed per spike, length of spike, spike weight, TW, BY, EY, HI. The investigation was carried out aiming to test the hypothesis that foliar fed Sulphur aerosols influence economic yield of wheat crop positively. The genotype GW-366 was the most responsive in physiological traits and GW-273 for yield traits under the influence of foliar fertilization with S-aerosols. Among the S-aerosols, (NH4)2SO4 was the most effective in the work. The results in this experiment are contribution of Sulphur aerosols using PCA towards total diversity.

scholarly journals A critical study on parameters controlling water requirement or wheat  Triticum aestivum L.) at various growth stages in ten different agroclimatic zones

MAUSAM ◽  
2021 ◽  
Vol 47 (4) ◽  
pp. 409-418
Author(s):  
A. KASHYAPI ◽  
R.C. DUBEY
Keyword(s):  
Wheat Yield ◽  
Growth Period ◽  
Triticum Aestivum L ◽  
Water Requirement ◽  
Wheat Crop ◽  
Critical Study ◽  
Growth Stages ◽  
Agroclimatic Zone ◽  
Agroclimatic Zones ◽  
Different Growth Stages

ABSTRACT.  The parameters controlling water requirement of wheat and its crop data, at various critical growth stages from ten different agroclimatic zones for five years. were collected and analysed. The study revealed that the total CU-demand for wheat crop in different wheat growing zones varied from 160 to 465 mm of water. In most of the zones, peak CU-demand were either at milk stage (21.0% of the total CU demand or at different stages (19.5% of the total CU-demand). Rabi season rainfall was not sufficient to meet the crop C.U-demand at different growth stages. The soil moisture study revealed that its depletion started around tillering stage indicating thereby, need for irrigation water beyond that stale. Computed average Kc, values (throughout the crop growth period) varied from 0.36 to 1.05 in different agroclimatic zones. Growth stage-wise K, values at or after elongation stage even exceeded one. Wheat yield in various agroclimatic zone varied from 1900 to 4800 kg/ha with the average productivity of 17 to 26 kg/ha/day. The WUE of the crop in different zones lay between 5 to 17 kg of grain/ha/mm of water. Depending upon this study wheat growing areas were divided into six zones.  

Effects of Meteorological Factors at Different Growth Stages on Yield Traits of Maize (Zea maysL.) in Heilonggang Basin

2013 ◽  
Vol 39 (5) ◽  
pp. 919 ◽  
Author(s):  
Bo MING ◽  
Jin-Cheng ZHU ◽  
Hong-Bin TAO ◽  
Li-Na XU ◽  
Bu-Qing GUO ◽  
...  
Keyword(s):  
Meteorological Factors ◽  
Growth Stages ◽  
Yield Traits ◽  
Different Growth Stages

Analyses of Aerosol Concentrations and Bacterial Community Structures for Closed Cage Broiler Houses at Different Broiler Growth Stages in Winter

2018 ◽  
Vol 81 (9) ◽  
pp. 1557-1564
Author(s):  
LINLIN JIANG ◽  
JIANLONG ZHANG ◽  
JINXIU TANG ◽  
MENG LI ◽  
XIAOYU ZHAO ◽  
...  
Keyword(s):  
Bacterial Community ◽  
High Throughput ◽  
High Throughput Sequencing ◽  
Total Concentration ◽  
Growth Period ◽  
Growth Cycle ◽  
Growth Stages ◽  
Community Structures ◽  
Dynamic Pattern ◽  
Different Growth Stages

ABSTRACT The aim of the present study was to analyze the aerosol concentrations and microbial community structures in closed cage broiler houses at different broiler growth stages to assess the dynamic pattern of microbial aerosols in closed cage systems. Our results revealed that the total concentration of bacterial aerosols gradually increased during the growth cycle of broilers. High-throughput sequencing of 16S rDNA revealed that microbial compositions differed tremendously during different growth stages, although Firmicutes and Proteobacteria were the dominant taxa in samples from all broiler growth stages. At the genus level, dominant phylotypes displayed great variation during different growth stages. Escherichia and Shigella were the most dominant taxa throughout the growth cycle, increasing from 4.3 to 12.4% as the broilers grew. The alpha index revealed that the microbial diversity displayed significant differences between the different growth stages and that the bacterial community had the highest diversity when broilers were 22 days old. High-throughput sequencing analyses revealed that environmental microbes and opportunistic pathogens had relatively high abundances during the winter growth period. The data revealed the composition and aerodynamic diameters of microbial aerosols in closed cage broiler houses at different broiler growth stages in winter. The results also enabled us to elucidate the dynamic pattern of microbial aerosols in broiler houses in response to bacterial communities. Our results may provide a basis for developing technologies for air quality control in caged poultry houses.

Response of eight Canadian spring wheat (Triticum aestivum L.) cultivars to copper: Copper content in the leaves and grain

1995 ◽  
Vol 75 (2) ◽  
pp. 405-411 ◽  
Author(s):  
J. O. Owuoche ◽  
K. G. Briggs ◽  
G. J. Taylor ◽  
D. C. Penney
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Growth Stage ◽  
Triticum Aestivum L ◽  
Yield Potential ◽  
Growth Stages ◽  
Cu Deficiency ◽  
Unlimited Growth ◽  
Young Leaves

Concentrations of copper (Cu) in the youngest fully emerged leaves (YFEL) and grain of eight widely grown Canadian spring wheat (Triticum aestivum L.) cultivars, Biggar, Columbus, Conway, Katepwa, Laura, Oslo, Park and Roblin, were determined. Leaves were sampled at five growth stages from field plots grown in 1990 and 1991 on Cu-deficient soil or soil treated with 12.2 kg Cu ha−1 as Cu sulphate. Symptoms of Cu deficiency, mainly rolling and wilting of young leaves and twisting and terminal dieback, were noted on Katepwa, Park and Roblin at Zadok growth stage 24. Significant (P ≤ 0.01) effects on Cu concentration in the YFEL were found due to cultivar, copper treatment, year and growth stage. The Cu concentrations in Katepwa, Park and Roblin not treated with Cu ranged between 4.6 and 5.7 μg g−1 in 1990 and between 2.8 and 3.5 μg g−1 in 1991 at Zadok growth stage 22. Cultivars Biggar, Columbus, Conway, Laura and Oslo did not show symptoms of Cu deficiency and had Cu concentrations in the range of 4.6–5.4 μg g−1 in 1990 and 2.3–3.1 μg g−1 in 1991. Deficiency symptoms were observed on Katepwa and Park supplied with Cu, although concentrations of Cu in the YFEL were relatively high. Grains sampled from the tillers generally had lower Cu concentrations than those from main stems, but the magnitude of this difference varied with the year. Significant correlations were found between Cu concentrations in the YFEL and grain yield (r = 0.90* in 1990 and 0.89* in 1991) and with floret fertility (r = 0.74* in 1990 and 0.94** in 1991). These large and significant correlations confirm the important role of Cu nutritional status in influencing floret fertility and grain yield. Critical levels of Cu in the leaves needed for unlimited growth could not be defined because of year-to-year variability. In this study, Cu concentration in the YFEL was not a useful indicator of potential Cu use efficiency in different wheat cultivars. However, for individual plants under Cu-deficiency stress, Cu concentration in the YFEL was a good indicator of the grain yield potential of different cultivars. Key words:Triticum aestivum, copper, youngest fully emerged leaves, tissue analysis

scholarly journals Comparison of the Intestinal Microbiota During the Different Growth Stages of Red Swamp Crayfish (Procambarus clarkii)

2021 ◽  
Vol 12 ◽  
Author(s):  
Mengqi Xie ◽  
Shiyu Zhang ◽  
Lili Xu ◽  
Zhixin Wu ◽  
Junfa Yuan ◽  
...  
Keyword(s):  
Intestinal Microbiota ◽  
Growth Stage ◽  
High Throughput Sequencing ◽  
Procambarus Clarkii ◽  
Intestinal Flora ◽  
Principal Component ◽  
The Body ◽  
Intestinal Microbiome ◽  
Growth Stages ◽  
Different Growth Stages

This study aimed to determine the effect of the growth stage of Procambarus clarkii on their intestinal microbiota. Intestinal samples of five different growth stages of P. clarkii (first instar, second instar, third instar, juvenile, and adult) from laboratory culture were analyzed through the Illumina MiSeq high-throughput sequencing platform to determine the intestinal microbiome of crayfish. The alpha diversity decreased along with the growth of the crayfish, with the relative abundance of the microbiota changing among stages; crayfish at closer development stages had a more comparable intestinal microbiota composition. A comparative analysis by principal component analysis and principal coordinate analysis showed that there were significant differences in the intestinal microbiota of crayfish among the different growth stages, except for the first two stages of larval crayfish, and the intestinal microbiota showed a consistent progression pattern from the larval stage to the juvenile stage. Some microbiota showed stage specificity, which might be the characteristic microbiota of different stages of growth. According to FAPROTAX functional clustering analysis, the three stages of larvae were clustered together, while the juvenile and adult stages were clustered separately according to the growth stage, indicating that, in the early stages of larval development, the function of the intestinal flora was similar; as the body grew and developed, the composition and function of the intestinal microbiota also changed.

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