CHEMICAL CHANGES IN NITROGEN FRACTIONS OF PLANT JUICE ON EXPOSURE TO FROST

1931 ◽  
Vol 5 (3) ◽  
pp. 327-332 ◽  
Author(s):  
R. Newton ◽  
W. R. Brown ◽  
J. A. Anderson
Keyword(s):  
Winter Wheat ◽  
Nitrogen Content ◽  
Protein Content ◽  
Inorganic Nitrogen ◽  
Amino Nitrogen ◽  
Added Sugar ◽  
Nitrogen Fractions ◽  
The Press ◽  
Dilute Sodium Hydroxide ◽  
Increased Sensitivity

Exposure of the press-juice of unhardened winter wheat plants to frost caused a decrease in coagulable protein content, an increase in amino nitrogen content and an increased sensitivity to hydrolysis by dilute sodium hydroxide. Added sugar reduced the amount of change. No change resulting from freezing could be demonstrated in the inorganic nitrogen fractions. It is suggested that protein splitting as found in hardened plants may be the result of frost rather than an adaptation against it, and that the value of sugar as a protection to winter plants may lie partly in its ability to delay this action.

scholarly journals The influence of foliar nutrition with urea in different phases of wheat development on grain protein content

2020 ◽  
Vol 27 ◽  
pp. 169-173
Author(s):  
I. M. Sheheda ◽  
N. V. Sandetska
Keyword(s):  
Winter Wheat ◽  
Nitrogen Content ◽  
Protein Content ◽  
Grain Protein Content ◽  
Grain Protein ◽  
Foliar Nutrition ◽  
Wheat Varieties ◽  
Grain Productivity ◽  
Applied Dose ◽  
Wheat Development

Aim. The effect of foliar urea nutrition on grain yield, protein, total protein harvest, and nitrogen content in the grain per spike in winter wheat plants of different varieties was studied. Methods. In the field experiment plants of six different bread winter wheat varieties were fertilized with urea in different ways: 1) control; 2) foliar nutrition with urea at the end of anthesis with a dose of 7 kg N / ha; 3) foliar nutrition with urea in the phase of late milk development. Results. It was found that after nutrition in the first period the yield increased by 7-11%, while after nutrition in the second period it remained practically unchanged in comparison with the control. The applied dose of nitrogen did not have a significant effect on the protein content. Grain productivity increased without reducing protein content in this case, and there was no negative correlation between these indicators. As a result, grain protein content was significantly increased in all varieties. Natalka had the highest indicator, due to the best combination of protein content and yield. The calculations of the increase in nitrogen content in the grain per spike at the end of anthesis showed that it was significantly higher than the out-of-root dose. Conclusions. Thus, it has been shown that foliar nutrition of wheat with urea at the end of anthesis is advisable for increase of protein harvest with the crop. This measure stimulates the functional activity of plants, promotes efficiency of nitrogen utilization. Keywords: nitrogen, grain protein, yield, winter wheat, foliar nutrition.

scholarly journals Improving Winter Wheat Yields In Organic Farming Systems Through Innovations In Green Manure Management

2015 ◽  
Vol 2 ◽  
pp. 268
Author(s):  
Danguolė Nemeikšienė ◽  
Aušra Arlauskienė ◽  
Alvyra Šlepetienė
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Nitrogen Content ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Inorganic Nitrogen ◽  
Farming Systems ◽  
Perennial Grasses ◽  
Research Station ◽  
Trifolium Pratense L

The paper presents effect of perennial grasses (Trifolium pratense L., Medicago sativa L., xFestulolium) and their aboveground mass management methods (removed from the field, mixed, mulching) as preceding crops on Ninorg in the soil as well as on yield of winter wheat under conditions of ecological farming. Field experiments were carried out at the Joniškėlis Research Station of the Lithuanian Institute of Agriculture (LIA) on an Gleyic Cambisol. Experimental evidence indicated that content of symbiotically fixed nitrogen in the biomass of legumes accounted for the largest share (61–84 %) of the total nitrogen content (208.0–298.0 kg ha- 1), accumulated in the biomass. Winter wheat grain yield significantly (r = 0.783; P < 0.05) correlated with soil inorganic nitrogen content in spring. Grain yield productivity increased by 0.01 t ha-1 after incorporation of 1 kg ha-1 nitrogen of legume crops biomass.

Relation of grain protein content and some agronomic traits in European cultivars of winter wheat

2012 ◽  
Vol 40 (4) ◽  
pp. 532-541 ◽  
Author(s):  
V. Mladenov ◽  
B. Banjac ◽  
A. Krishna ◽  
M. Milošević
Keyword(s):  
Winter Wheat ◽  
Protein Content ◽  
Agronomic Traits ◽  
Grain Protein Content ◽  
Grain Protein

Antioxidant Activity of Silk Fibroin Peptide Hydrolyzed by Pancreatin

2014 ◽  
Vol 1081 ◽  
pp. 110-114 ◽  
Author(s):  
Zhen Zhu ◽  
Hua Yin ◽  
Yan An
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Nitrogen Content ◽  
Silk Fibroin ◽  
Radical Scavenging ◽  
Amino Nitrogen ◽  
Free Radical Scavenging ◽  
Hydrolysis Process ◽  
Superoxide Free Radical ◽  
Hydrolysis Of

This research adopts the pancreatin hydrolysis of silk fibroin active peptide, evaluate the antioxidant activity of hydrolysates. In the process of hydrolysis of silk fibroin, by measuring the amino nitrogen content of neutral formaldehyde titration method. Find the amino nitrogen content gradually stabilized at around 0.37g/L, and superoxide free radical scavenging rate changing with time fluctuation trend, superoxide free radical scavenging rate to a maximum of 65.03% at 220min.The use of silk fibroin hydrolysis process optimization,reaction time 160min, enzyme concentration4% , substrate concentration 20mg/ml, pH 8, temperature 38°C. The hydrolysis process under the hydrolysate on superoxide radical scavenging rate of 72.73%. The scavenging rate of hydroxyl radical is 47.24%. Red blood cell hemolysis induced by H2O2 inhibition rate was 24.30%.

Components of test weight of ten varieties of winter wheat grown with two rates of nitrogen fertilizer application

1975 ◽  
Vol 85 (3) ◽  
pp. 559-563 ◽  
Author(s):  
Fiona M. Pushman ◽  
J. Bingham
Keyword(s):  
Winter Wheat ◽  
Protein Content ◽  
Nitrogen Fertilizer ◽  
Ventral Surface ◽  
Fertilizer Application ◽  
Test Weight ◽  
Varietal Differences ◽  
Flour Yield ◽  
Packing Efficiency ◽  
Xylene Separation

SUMMARYVarietal and environmental factors which influence test weight were investigated in a field trial with ten varieties of winter wheat and two rates of nitrogen fertilizer. Varietal differences in test weight were correlated positively with the protein content of the grain and inversely with grain yield but they were not related to 1000-grain weight or to flour yield. Variation in test weight associated with varietal and environmental effects in protein content was due to differences in the density of the grain, as measured by displacement of xylene. Separation into density grades within a sample by a flotation method showed a similar relationship with protein content. There were also varietal differences in packing efficiency of the grain. In the case of Maris Huntsman a poor packing efficiency was considered to stem from morphological features of the floret and developing grain which lead to characteristic transverse folds in the ventral surface of the mature grain. For wheat grown in the United Kingdom, test weight may provide a useful guide to flour yield for samples of one variety but it is likely to be misleading for comparisons between varieties.

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