scholarly journals Repellency of insecticides and the effect of thiacloprid on bumble bee colony development in red clover (Trifolium pratense L.) seed crops

2019 ◽  
Vol 69 (5) ◽  
pp. 439-451 ◽  
Author(s):  
Lars T. Havstad ◽  
John I. Øverland ◽  
Silja Valand ◽  
Trygve S. Aamlid
Keyword(s):  
Trifolium Pratense ◽  
Red Clover ◽  
Colony Development ◽  
Bumble Bee ◽  
Bee Colony ◽  
Trifolium Pratense L ◽  
Seed Crops

EFFECTS OF ROW SPACING AND SEEDING RATES ON SEED YIELD IN RED CLOVER, ALSIKE CLOVER AND BIRDSFOOT TREFOIL

1977 ◽  
Vol 57 (2) ◽  
pp. 413-418 ◽  
Author(s):  
P. PANKIW ◽  
S. G. BONIN ◽  
J. A. C. LIEVERSE
Keyword(s):  
Seed Yield ◽  
Trifolium Pratense ◽  
Seed Set ◽  
Red Clover ◽  
Birdsfoot Trefoil ◽  
Total Production ◽  
Seed Yield Components ◽  
Trifolium Pratense L ◽  
Seed Crops ◽  
Seed Yields

The effects of various row spacings and seeding rates on seed yield and certain seed yield components, viz, florets per head, seed set, seeds per pod, were studied on single seedings with three successive seed crops of red clover (Trifolium pratense L.), alsike clover (T. hybridum L.), and birdsfoot trefoil (Lotus corniculatus L.). Alsike clover and birdsfoot trefoil produced the highest yields at the narrow 15-cm spacing with successive decreases to the 60-cm spacing. The taller-growing and later-blooming, single-cut red clover was slightly more adaptable to varying spacings with the highest yields at 30- and 45-cm spacings, and slightly lower yields at the 15- and 60-cm spacings. All three crops competed successfully with weeds at the narrow spacings (15 and 30 cm). All three crops were able to compensate within limits in the 2nd and 3rd seed yr for differences in stand caused by different seeding rates. Seeding rates of 2.2 and 4.5 kg/ha were most favorable. Certain components of yield, e.g., florets per inflorescence, percent seed set, and seeds per pod, did not vary within years and are primarily affected by rainfall, soil fertility, pollinator populations and favorable pollinating weather. Differences in seed yields were attributable to total production of flower heads or racemes.

Comparisons of Floral Response of Seed Lots of Dollard Red Clover, Trifolium pratense L. 1

Crop Science ◽  
1965 ◽  
Vol 5 (5) ◽  
pp. 425-428 ◽  
Author(s):  
R. J. Bula ◽  
R. G. May ◽  
C. S. Garrison ◽  
C. M. Rincker ◽  
J. G. Dean
Keyword(s):  
Trifolium Pratense ◽  
Red Clover ◽  
Trifolium Pratense L

scholarly journals Volatile Constituents of Trifolium Pratense and T. Repens from N.E. Italian Alpine Pastures

2009 ◽  
Vol 4 (6) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Aldo Tava ◽  
Daniele Ramella ◽  
Maris Grecchi ◽  
Paolo Aceto ◽  
Renato Paoletti ◽  
...  
Keyword(s):  
Steam Distillation ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Volatile Oil ◽  
Volatile Fraction ◽  
Fresh Weight ◽  
Fresh Weight Basis ◽  
Qualitative And Quantitative ◽  
Aerial Parts ◽  
Trifolium Pratense L

The composition of the volatile fraction of two important forage legumes from Italian sub-alpine N.E. pastureland, namely Trifolium pratense L. subsp. pratense (red clover) and T. repens subsp. repens (white clover) were investigated. The volatile oil was obtained from the fresh aerial parts by steam distillation and analyzed by GC/FID and GC/MS. The oil yield was 0.018 and 0.021% (weight/fresh weight basis) for T. pratense and T. repens, respectively. Several classes of compounds were found in both the oils, including alcohols, aldehydes, ketones, terpenes, esters, hydrocarbons, phenolics and acids. Qualitative and quantitative differences were found.

Polycross‐Progeny Testing of Red Clover (trifolium pratense L. 1

Crop Science ◽  
1968 ◽  
Vol 8 (4) ◽  
pp. 451-454 ◽  
Author(s):  
Norman L. Taylor ◽  
W. A. Kendall ◽  
W. H. Stroube
Keyword(s):  
Trifolium Pratense ◽  
Red Clover ◽  
Progeny Testing ◽  
Trifolium Pratense L

scholarly journals Identification of an extensive gene cluster among a family of PPOs in Trifolium pratense L. (red clover) using a large insert BAC library

2009 ◽  
Vol 9 (1) ◽  
pp. 94 ◽  
Author(s):  
Ana Winters ◽  
Sue Heywood ◽  
Kerrie Farrar ◽  
Iain Donnison ◽  
Ann Thomas ◽  
...  
Keyword(s):  
Gene Cluster ◽  
Trifolium Pratense ◽  
Bac Library ◽  
Red Clover ◽  
Trifolium Pratense L

scholarly journals Mineral Composition of Red Clover under Rhizobium Inoculation and Lime Application in Acid Soil

2015 ◽  
Vol 43 (2) ◽  
pp. 554-560 ◽  
Author(s):  
Olivera STAJKOVIC-SRBINOVIC ◽  
Dušica DELIC ◽  
Nataša RASULIC ◽  
Dragan CAKMAK ◽  
Djordje KUZMANOVIC ◽  
...  
Keyword(s):  
Mineral Composition ◽  
Rhizobium Leguminosarum ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Red Clover ◽  
Dry Weight ◽  
Rhizobium Inoculation ◽  
Shoot Dry Weight ◽  
Trifolium Pratense L ◽  
Lime Application

In the present study the effects of Rhizobium inoculation and lime application on the mineral composition (N, P, K, Ca, Mg, Fe, Mn, Cu, Zn, B) of red clover (Trifolium pratense L.), in very acid soil were evaluated. Inoculation with Rhizobium leguminosarum bv. trifolii significantly increased shoot dry weight (SDW) of red clover plants (three times greater), as well as N, Mg, Fe, Mn and Cu contents in plants compared to the control. Application of lime and Rhizobium together, depending on the lime rate (3, 6 or 9 t ha-1 of lime) and the cut, increased SDW significantly, but decreased the contents of N, P, K, Mg, Mn, Zn and B in plants. Regardless of the changes, in all treatments in both cuts, contents of N, K, Ca, Mg, Mn and Zn in plants were among sufficiency levels (Mg content was elevated in the second cut), while Fe content was mainly high, as well as Cu (in the second cut). Contents of P and B in plants were somewhat lower than sufficiency levels, but above critical level. Therefore, red clover can be grown with satisfactory yield and mineral composition in acid soil with Rhizobium inoculation only, but the application of P and B fertilization is desirable.

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