Canada - Food Soybean Quality Summary | ||||||
0 | ||||||
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Tofu/Soymilk/Miso |
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Natto |
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2011 |
2012 |
2011 |
2012 |
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Seed Weight (g/100 seeds) |
19.20 |
18.90 |
7.50 |
9.20 |
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Water Absorption |
1.26 |
1.21 |
1.33 |
1.28 |
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Nitrogen Solubility |
85.60 |
86.60 |
84.20 |
85.70 |
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Chemical Composition |
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Protein |
41.80 |
41.50 |
41.10 |
43.70 |
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Oil |
20.60 |
20.30 |
19.80 |
18.70 |
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Sugar Content (g/kg DM) |
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|
|
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Sucrose |
66.20 |
58.40 |
61.70 |
54.30 |
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Raffinose |
7.70 |
8.40 |
7.10 |
6.40 |
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Stechyose |
39.00 |
34.10 |
43.40 |
36.70 |
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Verbascose |
0.99 |
0.40 |
1.46 |
0.52 |
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Total |
46.70 |
42.80 |
51.90 |
43.70 |
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Isoflavone (mg/kg DM) |
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|
|
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Total |
2,555 |
2,085 |
2,740 |
2,242 |
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SOURCE: Canadian Grain Commission |
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Total sugars is the sum of raffinose, stachyose and verbascose |
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Isoflavone total is the sum of aglycones (daidzein, genistein and glycitein), glucosides, malonyl glucosides and acetyl glucosides |
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Canadian Food Soybean Quality Analysis
WINNIPEG - Jan 15/13 - SNS -- Last year's food-type soybean harvest in Canada expeienced an average decrease in protein content and an average increase in oil content, according to and analysis of 183 generic food-type and 5 Natto-type soybean samples tested by the Canadian Grain Commission (CGC).
Protein content for 2012 Canadian food-type soybeans ranged from 35.0 to 51.0 g/100 g DM. The average protein content in 2012 was 41.3 g/100 g DM, which was lower than that in 2011 (42.3 g/100 g DM). The average protein content for Manitoba in 2012 was 37.4 g/100 g DM, a decrease of 2.3 g/100 g DM when compared to 2011. The mean protein content for Ontario in 2012 was 41.3 g/100 g DM, which was lower than that in 2011, while the average protein content for Quebec in 2012 was 42.4 g/100 g DM, which was slightly higher than that in 2011. Food-type soybeans from Manitoba displayed lower mean protein content than those from Ontario and Quebec.
Oil content for 2012 Canadian food-type soybeans varied from 17.1 to 24.1 g/100 g DM. The average oil content in 2012 was 21.9 g/100 g DM, which was 1.1 g/100 g DM higher than that in 2011. The average oil content for Manitoba in 2012 was 22.5 g/100 g DM, 0.9 g/100 g DM higher as compared to 2011. The mean oil content for Ontario in 2012 was 21.9 g/100 g DM, 1.0 g/100 g DM higher than that in 2011. The average oil content for Quebec in 2012 was 20.8 g/100 g DM, 0.3 g/100 g DM higher than that in 2011. Food-type soybeans from Manitoba exhibited higher average oil content in 2012 than those from Ontario and Quebec.
Variations in protein and oil content for Canadian food-type soybeans can be affected by variety and growing environmental conditions.
Tofu, Soymilk and Miso Soybeans
Mean 100-seed weight for 2012 generic foodtype soybean was 18.9 g, which was slightly lower than that for 2011 (19.2 g).
Water absorption capacity of 2012 generic food-type soybeans was 1.21 g H2O/g seeds, which was similar to that for 2011 soybeans. Seed size and water uptake capacity are important quality characteristics of food-type soybeans in the production of tofu, soymilk and miso.
Nitrogen solubility index (NSI) indicating percentage of water-soluble protein was 86.6% for 2012 generic food-type soybean, which was higher than that for 2011 (85.6%). High NSI is preferred for soymilk and tofu production since soybeans with a high NSI tend to give a high protein recovery into soymilk, which in turn leads to high recovery in the final tofu product.
The average protein content for 2012 Canadian generic food-type soybean was 41.5 g/100 g DM, which was slightly lower than that for 2011 (41.8 g/100 g DM). The average oil content for 2012 Canadian generic food-type soybean was 20.3 g/100 g DM, which was slightly lower than that for 2011 (20.6 g/100 g DM).
The mean sucrose content in 2012 generic food-type soybean was 58.4 g/kg DM, which was lower than that (66.2 g/kg DM) in 2011. The average total oligosaccharides content for generic food-type soybean was 42.8 g/kg DM, which was lower than that (46.7 g/kg DM) in 2011.
The average total isoflavones content for 2012 Canadian generic food-type soybean was 2085 mg/kg DM, which was lower than that for 2011.
Natto Soybeans
Mean 100-seed weight for 2012 Natto-type soybean was 9.2 g, which was higher than that for 2011. Water absorption value for 2012 Natto-type soybean was 1.28 g H2O/g seeds, which was slightly lower than that for 2011. NSI was 85.7% for 2012 Natto-type soybean, which was higher than that for 2011 (84.2%).
The average protein content for 2012 Canadian Natto-type soybean was 43.7 g/100 g DM, which was higher than that for 2011 (41.1 g/100 g DM), while the mean oil content for 2012 Natto-type soybean was 18.7 g/100 g DM, which was lower than that for 2011 (19.8 g/100 g DM).
The average sucrose content for 2012 Canadian Natto-type soybean was 54.3 g/kg DM, which was lower than that for 2011 (61.7 g/kg DM). The mean total oligosaccharides content for 2012 Natto-type soybean was 43.7 g/kg DM. This was lower than that for 2011 (51.9 g/kg DM).
The average total isoflavones content in 2012 Canadian Natto-type soybean was 2242 mg/kg DM, which was lower than that in 2011 (2740 mg/kg DM).
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