The Carotene Content of Several Varieties and Strains of Alfalfa

Thompson, Charles P.

doi:10.2134/agronj1949.00021962004100070004x

Cited by 16 publications

(6 citation statements)

References 3 publications

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“…The mean carotene content of the lucerne was found to be of the same magnitude as that found In other areas where lucerne is used as a principal source of vitamin A in mixed feeding stuffs (11).…”

Section: Carotenesupporting

confidence: 74%

The Yields and Composition of Lucerne, Grass and Clover Under Different Systems of Management—i

Davies

Morgan

Davies

1953

Grass and Forage Science

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A question of importance in many parts of Britain is whether lucerne can supply a quantity of nutrients to compare favourably with that of other crops commonly grown for hay, silage or dried grass. There is also the need to discover the conditions under which lucerne can best withstand weed competition in high rainfall areas, and to determine the advantages, if any, of associating it with certain grasses or clover. The purpose of this experiment was to provide some critical data on these matters. On some of the experimental plots lucerne alone was sown, while on others various grasses and clover were sown with it. For comparative purposes grasses were also sown without lucerne, either alone or in association with clover. The experiment was designed to study the crops under three systems of management involving two, three or four cuts taken in the first harvest year. In the second harvest year a uniform system of three cuts was adopted for all the plots so as to study the residual effects of the different cutting treatments adopted in the preceding year. EXPERIMENTAL 'i'he plots under investigation were situated at Frongoch Farm of the Welsh Plant Breeding Station, on a Cardiganshire medium loam of average fertility, and were sown without a cover crop on 17 May 1949. The rates of seeding were as follows (lh. per acre):- Plot

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Section: Carotenesupporting

confidence: 74%

The Yields and Composition of Lucerne, Grass and Clover Under Different Systems of Management—i

Davies

Morgan

Davies

1953

Grass and Forage Science

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“…Several workers (10,5,7,4) have reported that the carotene content of pasture grasses is dependent largely upon the growing season and the stage of maturity. Thompson (8) showed that for three strains of alfalfa found in California common, the carotene content decreased at successive stages of growth as the plants approached maturity. In four species of grasses studied by Bird (2), the carotene decreased to approximately one-half that of the short-grass stage by the time the plants began to bloom.…”

mentioning

confidence: 99%

The Effect of Cutting Treatments on the Carotene Content of Alfalfa in the Yakima Valley¹

McGuire¹,

Jackobs²

1951

Agronomy Journal

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S EVERAL factors have been shown to influence the carotene content of grasses and legumes. Those factors of greatest importance are the stage of growth of the herbage and the seasonal effect characterized by a minimum concentration in summer. The study reported here afforded an opportunity to separate the two factors and show the effect of each.Several workers (10,5,7,4) have reported that the carotene content of pasture grasses is dependent largely upon the growing season and the stage of maturity. Thompson (8) showed that for three strains of alfalfa found in California common, the carotene content decreased at successive stages of growth as the plants approached maturity. In four species of grasses studied by Bird (2), the carotene decreased to approximately one-half that of the short-grass stage by the time the plants began to bloom. In general, reports show that an increase in yield of dry matter in the advanced stages of maturity is obtained at a sacrifice of the concentration of carotene.There is a seasonal decrease in carotene content that is independent of the stage of growth. Atkeson, et al. ( l) reported that, in spring and early summer, plants were relatively high in carotene, with a decrease occurring during the later summer months. The decrease was attributed to drought and high midsummer temperatures in combination with drought. In the four species of grasses studied by Bird (2), when the grasses were cut at the short-grass stage at six intervals throughout the season, the carotene content reached the lowest level in July. After that time, there was an increase in carotene concentration until fall, when values approached those of spring. In a study of weekly variation in carotene content of various herbages during the season, Snyder and Moore (7) found that first cutting alfalfa in Michigan declined from 432 ppm at an immature stage (April 25) to 171 ppm at hay stage on June 20. The second crop declined from 318 ppm at 17 days recovery (July 7) to 132 ppm at hay stage on August 16. The immature third crop decreased from 367 ppm on August 23 to 284 ppm at the three-fourths bloom stage on September 26. It was concluded that the carotene content of the herbages studied was greater at earlier stages of growth, and the carotene content showed a progressive decrease as the plants matured except where affected by factors governing the rate of growth.This paper presents the results of a study designed to determine the cutting treatments or combinations of treatments which would produce the greatest seasonal yield of carotene. Materials and MethodsThe study was conducted on Ladak alfalfa at the Irrigation Experiment Station, Prosser, Wash. The climatic and soil condi· tions, design, management, and harvesting methods were previously reported with the results of various treatments on yields (3). The plots were seeded in 1946, and in 1947-48 were subjected to spring-clipping treatments of no clipping and clipping at average heights of 4, 7, and 12 inches in combination with intervals between cuttings of 25...

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“…They found considerable variation; some of the hybrids were consistently high in carotene while other hybrids were consistently low. Thompson (10) compared the carotene contents of the forage of nine alfalfa varieties grown in Missouri when cut as a first and as a second crop. A wide variation existed among the varieties with respect to carotene content.…”

Section: Comparison Of the Carotene Andmentioning

confidence: 99%

Comparison of the Carotene and Nitrogen Contents of Alfalfa Forage from Selected Clonal Lines¹

Staker¹,

Crandall

1953

Agronomy Journal

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The Carotene Content of Several Varieties and Strains of Alfalfa

Cited by 16 publications

References 3 publications

The Yields and Composition of Lucerne, Grass and Clover Under Different Systems of Management—i

The Yields and Composition of Lucerne, Grass and Clover Under Different Systems of Management—i

The Effect of Cutting Treatments on the Carotene Content of Alfalfa in the Yakima Valley¹

Comparison of the Carotene and Nitrogen Contents of Alfalfa Forage from Selected Clonal Lines¹

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The Carotene Content of Several Varieties and Strains of Alfalfa

Cited by 16 publications

References 3 publications

The Yields and Composition of Lucerne, Grass and Clover Under Different Systems of Management—i

The Yields and Composition of Lucerne, Grass and Clover Under Different Systems of Management—i

The Effect of Cutting Treatments on the Carotene Content of Alfalfa in the Yakima Valley1

Comparison of the Carotene and Nitrogen Contents of Alfalfa Forage from Selected Clonal Lines1

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The Effect of Cutting Treatments on the Carotene Content of Alfalfa in the Yakima Valley¹

Comparison of the Carotene and Nitrogen Contents of Alfalfa Forage from Selected Clonal Lines¹