Relationship of Tannin, Dry Matter Digestibility and Crude Protein in <i>Sericea lespedeza</i><sup>1</sup>

Donnelly, E. D.; Anthony, W. S.

doi:10.2135/cropsci1969.0011183x000900030035x

Cited by 30 publications

(13 citation statements)

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“…In all accessions of prostrate kochia, saltbush, and winterfat,-tannin content was below the critical levels (more than 25 mgjg) that inhibit animal acceptance (Donnelly and Anthony, 1969). From this standpoint, all accessions would be acceptable forage.…”

Section: Resultsmentioning

confidence: 92%

Forage Quality of Prostrate Kochia Compared with Three Browse Species¹

Davis¹

1979

Agronomy Journal

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Prostrate kochia [Kochia prostrata (L.) Schrad.], a shrub native to Asia, has received considerable attention because of its adaptation as a browse plant on western ranges. Prostrate kochia is a member of the Chenopodiaceae, the same family to which halogeton [Halogeton glomeratus (Bieb.) C. A. Mey.] and greasewood [Sarcobatus vermiculatus (Hook.) Torr.] belong. Both of these accumulate oxalates and can be toxic, depending on environmental conditions. This report presents data comparing crude protein, crude fiber, beta carotene, tannins, and oxalates of 13 prostrate kochia introductions to winterfat [Ceratoides lanata( Pursh.) J. T. Howell], an Iranian saltbush (Atriplex verrucifera Bieb.), and fourwing saltbush [Atriplex canescens (Pursh.) Nutt.], a favored browse plant native to the western range, during the browse utilization season of August to March. Two‐month‐old seedlings were transplanted to the field at Central Ferry, Wash. in early April. The soil was a Snake River bar alluvial classified as “Spofford” silt loam “fine‐silty, mixed, mesic typic Natrixerolls” with a pH of 6.7. Harvests were made at the end of the second and third growing seasons. Crude protein exhibited a regular downward trend from 14.7% to 8.9% in prostrate kochia, while fourwing saltbush varied from 13.60%, to 11.40%, and winterfat from 16.8% to 10.1%. Crude fiber increased from 19% to 42% in prostrate kochia. There was little change in fourwing saltbush and winterfat (14.6% to 17.8% and 30% to 33%, respectively). The highest tannin value was 7.0 mg/g in prostrate kochia, well below the critical level of 25 mg/g reported by E. D. Donnelly and W. B. Anthony in 1969. Oxalates averaged 1.20% in prostrate kochia, 1.75% in fourwing saltbush and 1.55% in winterfat. Using the 45 g critical level for sheep reported by H. L. Morton and coworkers in 1959, it would require daily consumption in excess of 2.25 kg of 2% oxalate forage before oxalates would be toxic. In August the carotene levels were comparable, but fourwing saltbush and winterfat were clearly superior during the winter months. Carotene levels dropped from 42 mg/100 g to 6.9 mg/100 g in January in prostrate kochia, but increased to 11 mg/100 g in March due to early bud development. The average of fourwing saltbush was 50 mg/100 g in August and 13 mg/100 g in March. Winterfat contained 50.5 mg/100 g in August, dropped to 19.6 mg/100 g in January, and climbed to 30.4 mg/100 g in March.

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Section: Resultsmentioning

confidence: 92%

Forage Quality of Prostrate Kochia Compared with Three Browse Species¹

Davis¹

1979

Agronomy Journal

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“…However in these experiments no relationship was found between levels of nitrogen in heather and voluntary intake. Tannins at similar levels to those found in heather have been implicated in reducing in vitro dry matter and apparent N digestibility in Sericea forage (Donnelly & Anthony, 1969;Cope & Burns, 1971). The low apparent and true digestibilities of nitrogen and the lack of any relationship between the nitrogen content of heather and voluntary intake may be, in part, caused by the presence of tannins in heather inducing the formation of protein-tannin complexes.…”

Section: Discussionmentioning

confidence: 95%

The effects of season and age of stand on the nutritive value of heather (Calluna vulgaris, L. Hull) to sheep

Milne¹

1974

J. Agric. Sci.

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In two experiments frozen heather (Calluna vulgaris, L. Hull), which contained 85-90 % of the current season's shoots, was offered ad libitum to castrated male sheep. In one experiment, heather harvested in July, September, November and March was offered to six sheep per harvest, D.M. digestibility fell from 55-9% in July to 41-9% in March, with the greatest decline occurring after flower development in August. There were no significant changes with season in voluntary intakes, which were low, ranging from 29 to 39 g D.M./kg W°-75 /day. Apart from the July harvest, intakes of digestible D.M. were insufficient to maintain the sheep. The apparent digestibility of N( 14-3-42• 2 %) and plasma urea N values (5-6 mg/100 ml) were low and undigested N of dietary origin in the faeces was high (25-45%). Sheep offered the September, November and March harvests were in considerable negative apparent balances of N and it was calculated that the sheep were in a negative balance of truly digested N. In a second experiment, heather harvested in August from pioneer, building and mature stands was offered to six sheep per harvest. There were no significant differences between stands in voluntary intake and digestibility. INTRODUCTIONIt has been estimated that there are 1-5 x 10° ha of heather-dominant land in Great Britain (Thomas 1956), and Grant & Milne (1972) have calculated that in Scotland 30 % of the sheep population are found in hill areas which are heather-dominant. The possibilities for improvement in sheep performance and output on these heather-dominant areas depend to a large extent upon a knowledge of the nutritive value of heather. Existing information on the nutritive value of heather has been reviewed by Thomas (1956), who indicated that, from the few experiments that had been made, effects of season and age of the stand on the nutritive value of heather were likely to be important.Observations on the behaviour of sheep grazing heather showed that it was principally the current season's shoots of the plant that were eaten (Thomas & Armstrong, 1952). Methods for the mechanical harvesting of the current season's shoots of heather were developed to enable the collection of sufficient quantities for the measurement of its nutritive value under controlled conditions. Two experiments were made in which the effects of season and age of the stand on the voluntary intake, digestibility and on some aspects

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“…For example, 15.0% of Nymphaea odorata and 11.8% of Brasenia schreberi is tannin (Boyd 1968), which is soluble in aqueous solutions. Tannin is indigestible, and the digestibility of protein decreases with increasing tannin content (Donnelly and Anthony 1969). Most aquatic plants contained less than 6% tannin, so tannin probably would not influence the nutritive quality of most species (Boyd 1968).…”

Section: Ecological Significancementioning

confidence: 99%

Relationships between Cell‐Wall Fractions, Nitrogen, and Standing Crop in Aquatic Macrophytes

Polisini¹,

Boyd²

1972

Ecology

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Shoot samples of 21 species of aquatic macrophytes were separated into cell—wall and noncell—wall fractions by digestion in a neutral—detergent solution. This method is useful for estimating the digestibility of plant production by native herbivores. Nitrogen content was also used as an indication of nutritive quality. Amounts of noncell—wall material and nitrogen in the dry matter decreased as shoot standing crops of the different species increased.

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Relationship of Tannin, Dry Matter Digestibility and Crude Protein in Sericea lespedeza¹

Cited by 30 publications

References 0 publications

Forage Quality of Prostrate Kochia Compared with Three Browse Species¹

Forage Quality of Prostrate Kochia Compared with Three Browse Species¹

The effects of season and age of stand on the nutritive value of heather (Calluna vulgaris, L. Hull) to sheep

Relationships between Cell‐Wall Fractions, Nitrogen, and Standing Crop in Aquatic Macrophytes

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Relationship of Tannin, Dry Matter Digestibility and Crude Protein in Sericea lespedeza1

Cited by 30 publications

References 0 publications

Forage Quality of Prostrate Kochia Compared with Three Browse Species1

Forage Quality of Prostrate Kochia Compared with Three Browse Species1

The effects of season and age of stand on the nutritive value of heather (Calluna vulgaris, L. Hull) to sheep

Relationships between Cell‐Wall Fractions, Nitrogen, and Standing Crop in Aquatic Macrophytes

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Relationship of Tannin, Dry Matter Digestibility and Crude Protein in Sericea lespedeza¹

Forage Quality of Prostrate Kochia Compared with Three Browse Species¹

Forage Quality of Prostrate Kochia Compared with Three Browse Species¹