Composition of Feedstuffs, Nonprotein Nitrogen in Soybeans.

Krober, Orland A.; Gibbons, Stacy

doi:10.1021/jf60119a019

Cited by 11 publications

(2 citation statements)

References 2 publications

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“…Our analysis showed that this method overestimated the net protein content by an average of 3%, due to the presence of non-protein nitrogen fractions (Figure 2 and Supplementary Table S1). This finding is consistent with previous studies that were based on a more limited number of samples (Krober and Gibbons, 1962;Thakur and Hurburgh, 2007). Relaying solely on crude protein content can be misleading when assessing soybean meal quality, especially for monogastric animals that cannot utilize non-protein nitrogen fractions.…”

Section: Discussionsupporting

confidence: 90%

Western Hemisphere quality and production capacity of soybean protein

Cerrudo,

Miller-Garvin,

Naeve

2023

Front. Sustain. Food Syst.

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Soybean’s protein concentration and amino acid profile vary geographically due to genotype and environment. We used 1817 on-farm grain samples from the United States, Brazil, and the Southern Cone to assess soybean protein variability in the Western Hemisphere, which accounts for 85% of global production. Our analysis found consistent spatial patterns for protein concentration and amino acid composition, with differences in protein concentration of up to 5.4% among regions. While there was a negative correlation between protein concentration and the abundance of critical amino acids (lysine, cysteine, threonine, methionine, and tryptophane), their amount per ton of grain increased with protein concentration. Our findings can guide market and industry in benchmarking soybean protein quality across the Western Hemisphere, which according to our projection could supply close to 120 million metric tons of protein and 17 million metric tons of the most critical amino acids annually by 2030.

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Section: Discussionsupporting

confidence: 90%

Western Hemisphere quality and production capacity of soybean protein

Cerrudo,

Miller-Garvin,

Naeve

2023

Front. Sustain. Food Syst.

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“…While in other studies there has been a good regression between these two parameters in the present study, this divergence casts some doubt on the validity of either method (Glencross et al., ). Logic suggests that the use of sum of amino acids provides a more valid assessment as it is less likely that there are non‐protein amino acids in the raw materials than non‐protein nitrogen sources (Krober & Gibbons, ). However, sum of amino acids does not account for tryptophan, albeit levels of this amino acid in most raw materials are very low and the comparison is still consistent across all samples.…”

Section: Discussionmentioning

confidence: 99%

A compendium of raw material digestibilities for barramundi, Lates calcarifer

et al. 2017

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A series of experiments were conducted to examine the nutrient and energy digestibility of a suite of diets and specific test raw materials when fed to juvenile (179 to 439 g) barramundi, Lates calcarifer. Each of the diets was prepared using a twin-screw extruder to mimic modern aquafeed manufacturing processes. Each of the diets was fed to juvenile barramundi for a minimum of a week to allow acclimation to the diet before the faeces were collected using stripping methods. A broad range of digestible nutrient and energy values among the different raw materials were observed, with protein digestibilities ranging from 36% to 106% and energy digestibilities ranging from 36% to 93%. This range in nutritional values of the different raw materials provides substantial utility in allowing the formulation of diets on a digestible nutrient and energy basis across the Asia Pacific region. These results also provide critical data to help underpin the replacement of both fishmeal and fish oil in barramundi diets. K E Y W O R D Sanimal by-products, Asian seabass, digestibility, ingredients, plant proteins 1 CSIRO Aquaculture,

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Changes in proteins and amino acids in developing soybean seed and effect of phosphorus nutrition

Kapoora¹,

Gupta²

1977

J Sci Food Agric

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Two varieties of soybean (Bragg and Punjab-I) grown in pot culture with three levels of phosphorus were studied for the changes in protein content, ether extract, amino acids and protein fractions during the development of the seed, and the effect of phosphorus nutrition thereon was also studied. The non-protein nitrogen, which formed a substantial portion of total nitrogen at early milky stage, decreased and true protein increased as the seed matured, but crude protein did not seem to alter much during the seed development, whereas ether extract gradually increased with maturity. The concentrations of free amino acids such as lysine, hydroxy-proline and tryptophan decreased whereas those of glutamic acid and alanine increased as the seed approached maturity. However, the total concentration of methionine and tryptophan in the protein of the seed was not much affected by maturity. The albumin fraction decreased from the early milky stage to the maturity stage. Glutelin rapidly increased from the early milky stage to mid-milky stage and sharply declined at the mature stage whereas the glycinin fraction rapidly increased from mid-milky to the mature stage of seed development. The prolamine fraction did not vary during seed development. Phosphorus application increased crude protein and true protein and decreased ether extract but had little effect on amino acids and protein fractions.

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Composition of Feedstuffs, Nonprotein Nitrogen in Soybeans.

Cited by 11 publications

References 2 publications

Western Hemisphere quality and production capacity of soybean protein

Western Hemisphere quality and production capacity of soybean protein

A compendium of raw material digestibilities for barramundi, Lates calcarifer

Changes in proteins and amino acids in developing soybean seed and effect of phosphorus nutrition

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