scholarly journals Effect of Foliar Spraying of Organic and Inorganic Selenium Fertilizers On Selenium Accumulation and Speciation During Different Stages of Rice Growth

2021 ◽  
Author(s):  
Zhengqing Yuan ◽  
Weixiong Long ◽  
Ting Liang ◽  
Menghan Zhu ◽  
Xiaoyun Luo ◽  
...  
Keyword(s):  
Foliar Application ◽  
Brown Rice ◽  
Selenium Deficiency ◽  
Interval Methods ◽  
Growth Stages ◽  
Selenium Content ◽  
Organic Selenium ◽  
Inorganic Selenium ◽  
Exogenous Addition ◽  
Heading Stage

Abstract Aims Most crops are supplemented with selenium (Se) through the exogenous addition of inorganic selenium fertilizer. There is a lack of in-depth research on organic selenium fertilizers. Meanwhile, the dosage range between human selenium deficiency and selenium toxicity is narrow, so the selenium content of agricultural products needs to be controlled within a reasonable interval. Methods W e analyzed and compared the Se accumulation and speciation in rice during three different growth stages (late tillering stage, initiate heading stage, and full heading stage) using three selenium fertilizers, selenite, fermented Se, and potassium Selenocyanoacetate (Se-AAF) via the foliar application. Results The selenium content in rice sprayed with organic selenium fertilizer was controlled in the relatively safe range and met the human selenium supplement requirement compared to the sprayed sodium selenite, which was too high of a dose. The percentage of organic Se and protein Se in brown rice was found to be similar in all three Se fertilizers. The highest organic selenium content of 91.57% was found in the grain of rice at the full heading stage by spraying Se-AAF. The main Se species in the grain was selenomethionine (SeMet), which reached 80% of the total selenium. Se-methyl selenocysteine(SeMeCys) was found only in Se-AAF. The grain quality showed that all three Se fertilizers increased the consistency of gelatinization. Conclusions Appropriately delaying the spraying time and selecting organic Se fertilizer as the Se source can help to produce green and safe selenium-rich rice.

scholarly journals Content of selenoaminoacids and catechins in Chinese green teas

2020 ◽  
Author(s):  
Aleksandra Sentkowska
Keyword(s):  
Mass Spectrometry ◽  
Antioxidant Activity ◽  
Radical Scavenging ◽  
Speciation Analysis ◽  
Selenium Content ◽  
Hydrophilic Interaction ◽  
Organic Selenium ◽  
Reducing Ability ◽  
Inorganic Selenium ◽  
Tea Infusions

AbstractIn this study, famous Zhejiang teas were evaluated as a well-advertised source of selenium. The 25 samples from provinces around China and Asia were purchased in Warsaw tea shops. The speciation analysis of selenium as well as the evaluation of catechin content in water tea infusions was performed using hydrophilic interaction liquid chromatography coupled to mass spectrometry (HILIC-MS/MS). It turned out that all of tested samples can be a great source of organic selenium species (no traces of inorganic selenium was found), however, Zhejiang teas did not differ much among others. Such a conclusion can also be drawn when comparing the antioxidant capacity of the tested samples, obtained with the application of four methods (Folin–Ciocalteu method, scavenging of the 2,2-diphenyl-1-picrylhydrazyl radical, hydroxyl radical scavenging and cupric reducing ability assay). What is more, no correlation was found between the selenium content and the antioxidant activity of studied teas. The results obtained for the six samples from Zhejiang Province were very varied, which shows that it is very difficult to interpret the results and compare them with the results of other authors.

scholarly journals Responses to organic and inorganic selenium in the performance and blood selenium content of growing pigs

1992 ◽  
Vol 1 (2) ◽  
pp. 211-214 ◽  
Author(s):  
Kaija Suomi ◽  
Timo Alaviuhkola
Keyword(s):  
Growing Pigs ◽  
Carcass Quality ◽  
Selenium Content ◽  
Gain Ratio ◽  
Organic Selenium ◽  
Inorganic Selenium ◽  
Daily Gain

An experiment was carried out with 36 growing pigs in order to compare their responses to organic selenium and inorganic selenium. No significant differences were found in daily gain, feed/gain ratio or carcass quality of growing pigs fed with 0.1 mg inorganic Se or the same amount of Se bound in yeast. Neither were there significant differences in the content of Se in the liver and serum between these Se sources. The amount of 0.4 mg yeast selenium in the feed increased the Se level in the serum and liver significantly as compared to a lower level ofsupplementation (0.1 mg) (p

scholarly journals Effect of foliar application of zinc on yield of wheat grown by avoiding irrigation at different growth stages

2016 ◽  
Vol 41 (2) ◽  
pp. 323-334 ◽  
Author(s):  
S Sultana ◽  
HM Naser ◽  
NC Shil ◽  
S Akhter ◽  
RA Begum
Keyword(s):  
Yield Components ◽  
Foliar Application ◽  
Growth And Yield ◽  
Optimum Dose ◽  
Growth Stages ◽  
Root Initiation ◽  
Crown Root ◽  
Yield And Yield Components ◽  
Different Growth Stages ◽  
Heading Stage

A field experiment was carried out at micronutrient experimental field of Soil Science Division, BARI, Joydebpur, Gazipur to study the effect of foliar application of zinc on yield of wheat (BARI gom-25) grown by skipping irrigation at different growth stages of the crop. The experiment was designed in a split plot design on sixteen treatments comprising four irrigation treatments (regular irrigation, skipped irrigation at crown root initiation, skipped irrigation at booting stage and skipped irrigation at grain filling stages of wheat growth) and four foliar application of zinc (0.0%, 0.02%, 0.04% and 0.06% of zinc). Zinc Sulphate Monohydrate (ZnSO4. H2O) was used as a source of Zn. The interaction effect of irrigation and foliar application of zinc significantly influenced the yield and yield components of wheat. The highest yield (5.59 t ha-1) was recorded in normal irrigation which was identical with skipping irrigation at flowering and heading stage with 0.06% foliar application of zinc. Skipping irrigation at crown root initiation stage had the most negative effect on growth and yield. Skipping irrigation at flowering and heading stage of wheat with 0.04% foliar application of zinc gave the identical yield in regular irrigation with 0.04% and 0.06% foliar application of zinc. Thus, foliar application of zinc played a major role on yield and yield components of wheat at later stages of growth. The response of foliar application of Zn was positive and quadrate in nature. The optimum dose was appeared as 0.04% foliar application of zinc for grain yield of wheat in the study area of Joydebpur, Gazipur (AEZ-28).Bangladesh J. Agril. Res. 41(2): 323-334, June 2016

scholarly journals Isolation of Indigenous Selenium Tolerant Yeast and Investigation of the Relationship Between Growth and Selenium Biotransformation

2019 ◽  
Vol 10 (1) ◽  
pp. 146-149
Author(s):  
Maryam Hosseindokht Khujin ◽  
Hamed Zare
Keyword(s):  
Biomass Production ◽  
High Capacity ◽  
Selenium Content ◽  
Organic Selenium ◽  
Yeast Strains ◽  
Selenium Accumulation ◽  
Inorganic Selenium ◽  
Low Toxicity ◽  
The Relationship ◽  
High Bioavailability

Purpose: Organic selenium compound such as selenomethionine plays a significant function in the response to oxidative stress. Saccharomyces cerevisiae have the ability to accumulate selenium and selenium biotransformation. Selection of indigenous selenium tolerant yeast is our goals. The relationship between cell growth and selenium biotransformation was also investigated. Methods: The screening of the yeast cell was carried out at two steps in order to select yeast with high capacity for resistance and accumulation of selenium. The isolates were selected according to produced high biomass at different concentrations of selenium. Secondly, best yeast strains from previous step were grown in presence of 25 mg/L of sodium selenite and organic selenium content was measured. Results: The S17 isolate showed had maximum organic selenium accumulation (2515 ppm) and biomass production (2.73 g/L) compared to the other isolates. The biomass production and organic selenium accumulation of the S17 during 120 hours was shown a direct relationship between growth and biotransformation. Conclusion: This increase in organic selenium content was achieved with yeast screening. It is interesting to know that organic selenium has high bioavailability and low toxicity compared with inorganic selenium. Therefore, finding yeast strains which are resistant to selenium can be very helpful in cancer prevention.

scholarly journals Association between fatality rate of COVID-19 and selenium deficiency in China

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hai-Yang Zhang ◽  
An-Ran Zhang ◽  
Qing-Bin Lu ◽  
Xiao-Ai Zhang ◽  
Zhi-Jie Zhang ◽  
...  
Keyword(s):  
Negative Binomial ◽  
Viral Infections ◽  
Case Fatality ◽  
Selenium Deficiency ◽  
Negative Binomial Regression ◽  
Negative Binomial Regression Model ◽  
Fatality Rate ◽  
Selenium Content ◽  
Individual Level ◽  
Binomial Regression

Abstract Background COVID-19 has impacted populations around the world, with the fatality rate varying dramatically across countries. Selenium, as one of the important micronutrients implicated in viral infections, was suggested to play roles. Methods An ecological study was performed to assess the association between the COVID-19 related fatality and the selenium content both from crops and topsoil, in China. Results Totally, 14,045 COVID-19 cases were reported from 147 cities during 8 December 2019–13 December 2020 were included. Based on selenium content in crops, the case fatality rates (CFRs) gradually increased from 1.17% in non-selenium-deficient areas, to 1.28% in moderate-selenium-deficient areas, and further to 3.16% in severe-selenium-deficient areas (P = 0.002). Based on selenium content in topsoil, the CFRs gradually increased from 0.76% in non-selenium-deficient areas, to 1.70% in moderate-selenium-deficient areas, and further to 1.85% in severe-selenium-deficient areas (P < 0.001). The zero-inflated negative binomial regression model showed a significantly higher fatality risk in cities with severe-selenium-deficient selenium content in crops than non-selenium-deficient cities, with incidence rate ratio (IRR) of 3.88 (95% CIs: 1.21–12.52), which was further confirmed by regression fitting the association between CFR of COVID-19 and selenium content in topsoil, with the IRR of 2.38 (95% CIs: 1.14–4.98) for moderate-selenium-deficient cities and 3.06 (1.49–6.27) for severe-selenium-deficient cities. Conclusions Regional selenium deficiency might be related to an increased CFR of COVID-19. Future studies are needed to explore the associations between selenium status and disease outcome at individual-level.

scholarly journals Selenium Biofortification of Wheat as a Strategy to Improve Human Nutrition

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 144
Author(s):  
Aleksandra Radawiec ◽  
Wiesław Szulc ◽  
Beata Rutkowska
Keyword(s):  
Spring Wheat ◽  
Foliar Application ◽  
Stem Elongation ◽  
Sodium Selenate ◽  
Control Group ◽  
Selenium Content ◽  
Wheat Grain ◽  
Elongation Phase ◽  
Fertilisation Treatment ◽  
Foliar Fertilisation

This paper analyses the effects of soil and foliar fertilization with sodium selenate (VI) on the selenium content in spring wheat grain. The research was carried out at the Departmental Experimental Station of the Institute of Agriculture WULS in Skierniewice in 2018 and 2019. The dose of selenium used was 5.00 g Se·ha−1 in various development stages of spring wheat. The results showed that selenium fertilisation did not affect the size of the grain yield, but both soil and foliar fertilisation significantly increased the content of selenium in wheat grain compared to the control group. The highest Se content was obtained with the method of soil fertilisation combined with the foliar application with a total dose of 10.00 g·ha-1 Se in the stem elongation phase (S + F2), and in the tillering and stem elongation phase (S + F1 + F2), which resulted in the values of 0.615 and 0.719 mg·kg−1 Se in grain, respectively. On this basis, it was concluded that the best time to carry out foliar fertilisation treatment is in the stem elongation phase (BBCH 30–39). The results show that the greatest increase in selenium content in the grain is achieved with soil and foliar fertilisation combined.

scholarly journals Analysis of Bioavailability and Induction of Glutathione Peroxidase by Dietary Nanoelemental, Organic and Inorganic Selenium

Nutrients ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 1073
Author(s):  
Mitchell T. Ringuet ◽  
Billie Hunne ◽  
Markus Lenz ◽  
David M. Bravo ◽  
John B. Furness
Keyword(s):  
Glutathione Peroxidase ◽  
Similar Efficacy ◽  
Enzymatic Assays ◽  
Germ Free ◽  
Organic Selenium ◽  
Protein Levels ◽  
Antioxidant Protein ◽  
Inorganic Selenium ◽  
Fresh Frozen ◽  
Gpx Activity

Dietary organic selenium (Se) is commonly utilized to increase formation of selenoproteins, including the major antioxidant protein, glutathione peroxidase (GPx). Inorganic Se salts, such as sodium selenite, are also incorporated into selenoproteins, and there is evidence that nanoelemental Se added to the diet may also be effective. We conducted two trials, the first investigated inorganic Se (selenite), organic Se (L-selenomethionine) and nanoelemental Se, in conventional mice. Their bioavailability and effectiveness to increase GPx activity were examined. The second trial focused on determining the mechanism by which dietary Se is incorporated into tissue, utilising both conventional and germ-free (GF) mice. Mice were fed a diet with minimal Se, 0.018 parts per million (ppm), and diets with Se supplementation, to achieve 0.07, 0.15, 0.3 and 1.7 ppm Se, for 5 weeks (first trial). Mass spectrometry, Western blotting and enzymatic assays were used to investigate bioavailability, protein levels and GPx activity in fresh frozen tissue (liver, ileum, plasma, muscle and feces) from the Se fed animals. Inorganic, organic and nanoelemental Se were all effectively incorporated into tissues. The high Se diet (1.7 ppm) resulted in the highest Se levels in all tissues and plasma, independent of the Se source. Interestingly, despite being ~11 to ~25 times less concentrated than the high Se, the lower Se diets (0.07; 0.15) resulted in comparably high Se levels in liver, ileum and plasma for all Se sources. GPx protein levels and enzyme activity were significantly increased by each diet, relative to control. We hypothesised that bacteria may be a vector for the conversion of nanoelemental Se, perhaps in exchange for S in sulphate metabolising bacteria. We therefore investigated Se incorporation from low sulphate diets and in GF mice. All forms of selenium were bioavailable and similarly significantly increased the antioxidant capability of GPx in the intestine and liver of GF mice and mice with sulphate free diets. Se from nanoelemental Se resulted in similar tissue levels to inorganic and organic sources in germ free mice. Thus, endogenous mechanisms, not dependent on bacteria, reduce nanoelemental Se to the metabolite selenide that is then converted to selenophosphate, synthesised to selenocysteine, and incorporated into selenoproteins. In particular, the similar efficacy of nanoelemental Se in comparison to organic Se in both trials is important in the view of the currently limited cheap sources of Se.

Study on the Ecological Circulation Agricultural System of Combining Planting and Raising of Berry Tea

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
Defang Cao ◽  
Xiuju Zhang ◽  
Shengyuan Mo ◽  
Guihua Luo ◽  
Zhengfang Qin ◽  
...  
Keyword(s):  
Agricultural Products ◽  
Hunan Province ◽  
Agricultural System ◽  
Selenium Content ◽  
High Quality ◽  
Organic Selenium ◽  
Medicinal Value ◽  
High Selenium ◽  
Ampelopsis Grossedentata ◽  
Scientific Name

Berry tea is a perennial vine. Its scientific name is ampelopsis grossedentata. It belongs to vitaceae and is widely spread in the Tujia people of Xiangxi, Hunan Province. By adopting appropriate agricultural planting technology, rational use of organic selenium fertilizer and nutritional conditioner, we can produce high-quality berry tea with more healthy and even medicinal value and high selenium content, and realize double protection of human health with high selenium content and high flavonoids. Under the existing planting system, through the supplement of breeding links, constructing ecological recycling agricultural system combining planting and raising, not only can greatly enrich the supply of table agricultural products, but also can effectively ensure the high quality and high safety of agricultural products, and can effectively enrich the local agricultural industrial structure.Key words: berry tea; selenium-enriched; ecological agriculture; industrial revitalization and economic development

Effect of foliar application of iron and zinc on performance of transplanted rice in middle Gangetic plains of Bihar

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
MOHAMMAD\ HASHIM ◽  
◽  
V K SINGH ◽  
K K SINGH ◽  
SHIVA DHAR ◽  
...  
Keyword(s):  
Agricultural Research ◽  
Foliar Application ◽  
Block Design ◽  
Indian Agricultural Research Institute ◽  
Ferrous Sulphate ◽  
Growth Yield ◽  
Growth Stages ◽  
Higher Plant ◽  
Gangetic Plains ◽  
Iron And Zinc

A field experiment was conducted during kharif season of 2015 and 2016 at research farmof the ICAR- Indian Agricultural Research Institute Regional Station Pusa, Samastipur, Biharto determine the foliar feeding of micronutrients (iron and zinc at different growth stages)on growth, yield and economics of rice in middle Gangetic plains of Bihar. The experimentwas laid out in randomized block design consisting of 9 treatments with 3 replications. Thetreatments consist of 0.5% spray of Zinc Sulphate and 1% spray of Ferrous Sulphate at fourdifferent growth stages i.e. 40, 50, 60 and 70 days aĞer transplanting (DAT) and one con-trol. The results shown significant increasing trends of growth, yield aĴributes and yield ofrice with four sprays of 1.0% solution of FeSO4at 40, 50, 60 and 70 days and three sprays ofZnSO4at 50, 60 and 70 days recorded significantly higher plant height, effective tillers/m2,panicle length, grains/panicle, 1,000-grain weight, biological yield, grain yield and straw yieldat maturity. These treatments also gave significantly higher net returns and benefit: cost ratioover the control.

scholarly journals Response of wheat cultivars to foliar potassium fertilization under irrigated saline environment

2016 ◽  
Vol 8 (1) ◽  
pp. 429-436 ◽  
Author(s):  
M. Kumar ◽  
A. Sarangi ◽  
D. K. Singh ◽  
A.R. Rao ◽  
S. Sudhishri
Keyword(s):  
Grain Yield ◽  
Foliar Application ◽  
Wheat Cultivars ◽  
Salt Tolerant ◽  
Saline Irrigation ◽  
Irrigation Regimes ◽  
Potassium Fertilization ◽  
Yield Difference ◽  
Significant Yield ◽  
Heading Stage

A field experiment with split-split plot design (SSPD) was conducted to study the response of two winter wheat (Triticumaestivum L.) cultivars (viz. salt tolerant cultivar KRL-1-4 and salt non-tolerant cultivar HD-2894) under saline irrigation regimes with and without foliar potassium fertilization on growth and grain yield of wheat during rabi 2011-12 and 2012-13. Potassium in the ratio of K+: Na+ (1: 10) was applied as foliar application during the heading stage of the crop. Results showed that the grain yield of KRL-1-4 and HD-2894 cultivars with foliar potassium fertilization at the heading stage increased by 6.5 to 22% and 3 to 15% during rabi 2011-2012, respectively under different saline irrigation regimes as compared to the control. Moreover, the results of rabi 2012-13 showed an increase in grain yield ranging from 4.5 to 20% for KRL-1-4 as compared to the control. Statistical analysis of grain yield parameter showed that the foliar potassium application in both varieties resulted in significant yield difference at 0.05 probability level as compared to the non-foliar application. Overall, it was observed that the foliar potassium fertilization increased the grain yield of both wheat cultivars, while the salt tolerant cultivar performed better than the salt non-tolerant cultivar under irrigated saline regimes.

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