scholarly journals Removal of As, Cd, Pb, and Zn from contaminated soil by high biomass producing plants

2011 ◽  
Vol 52 (No. 9) ◽  
pp. 413-423 ◽  
Author(s):  
P. Tlustoš ◽  
J. Száková ◽  
J. Hrubý ◽  
I. Hartman ◽  
J. Najmanová ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Cannabis Sativa ◽  
Red Clover ◽  
Vegetation Period ◽  
Carthamus Tinctorius ◽  
High Biomass ◽  
Element Mobility ◽  
Trifolium Pratense L

The uptake of As, Cd, Pb, and Zn and potential phytoremediation efficiency of five high biomass producing crops, white sweetclover (Melilotus alba L.), red clover (Trifolium pratense L.), curled mallow (Malva verticillata L.), safflower (Carthamus tinctorius L.) and hemp (Cannabis sativa L.) commonly used as grazing and/or energy crops was evaluated in both pot and field experiments at soils with different level of element contamination. In pot experiment the highest phytoremediation efficiency was demonstrated by C. tinctorius where 4.8% of Cd and 1.1% of Zn were removed from the moderately contaminated soil in one vegetation period when repeated harvest of aboveground biomass was performed. The removal of As and Pb was negligible for all the investigated plant species. At the highest element content in soil inhibition of plant growth due to the element phytotoxicity to plants was reported in most of cases. In the precise field experiment lower phytoremediation efficiency (biennial phytoremediation factors did not exceed 0.2% for Pb and Zn and 0.3% for Cd for C. tinctorius) was determined but yield suppress was not observed. Thus, free space for manipulation with element mobility in soil to increase element uptake by plants remains for further research.

Legume cover crops with winter cereals in southern Manitoba: Fertilizer replacement values for oat

2005 ◽  
Vol 85 (3) ◽  
pp. 645-648 ◽  
Author(s):  
J. R. Thiessen Martens ◽  
M. H. Entz ◽  
J. W. Hoeppner
Keyword(s):  
Cover Crops ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Sandy Loam ◽  
Red Clover ◽  
Canadian Prairies ◽  
Winter Cereals ◽  
Crop Field ◽  
Legume Cover Crops ◽  
Trifolium Pratense L

Yield benefits of legume cover crops in winter/spring cereal systems have not been well documented in the Canadian prairies. The objective of this study was to evaluate the fertilizer replacement values (FRV) of relay-cropped alfalfa (Medicago sativa L.) and red clover (Trifolium pratense L.) and double-cropped chickling vetch (Lathryus sativus L.) and black lentil (Lens culinaris Medik. subsp. culinaris) to a subsequent oat (Avena sativa L.) crop. Field experiments were conducted in Manitoba on a clay soil at Winnipeg and a sandy loam at Carman. Alfalfa provided the highest FRV at Winnipeg (51–62 kg N ha-1), followed by chickling vetch (29–43 kg N ha-1), lentil (23–39 kg N ha-1), and red clover (24–26 kg N ha-1). FRV could not be established at Carman, where course-textured soil and low rainfall limited legume growth. Key words: Relay cropping, double cropping, cover crops

EFFECT OF APPLIED SELENIUM ON THE SELENIUM CONTENT OF BARLEY AND FORAGES AND SOIL SELENIUM DEPLETION RATES

1982 ◽  
Vol 62 (1) ◽  
pp. 145-154 ◽  
Author(s):  
UMESH C. GUPTA ◽  
K. A. WINTER ◽  
K. B. McRAE
Keyword(s):  
Field Experiments ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Sharp Decrease ◽  
Phleum Pratense ◽  
Hordeum Vulgare L ◽  
Trifolium Pratense L ◽  
Medicago Sativa L ◽  
Cropping Seasons ◽  
Phleum Pratense L

Two separate field experiments were conducted on several crops to determine the effect of selenium (Se) applied to soils with pH levels between 5.7 and 6.6. Tissue Se levels after a single application of Se and lime, were monitored for up to six cropping years or until the tissue Se fell below 0.1 ppm, the level considered to be necessary for animal nutrition. For applications of 1.12 and 2.24 kg Se/ha, the minimal tissue Se concentration (> 0.1 ppm) was maintained in barley (Hordeum vulgare L.) for two cropping years, but with a very sharp decrease for the first 3 yr. In the case of timothy (Phleum pratense L.), tissue levels greater than 0.1 ppm were maintained for 3 yr at the higher rate of Se without lime and up to 5 yr at high soil pH levels. At the applied rates of 0.28 and 0.56 kg Se/ha, the tissue Se levels above 0.1 ppm in timothy, red clover (Trifolium pratense L.), and alfalfa (Medicago sativa L.) were maintained for one and two cropping years, respectively. In spite of the sharp decrease in plant tissue Se levels, little decrease in total soil Se was noted at rates of 1.12 and 2.24 kg Se/ha after successive croppings of barley and timothy. Although not always significant, liming, in general, increased the plant Se concentration. The Se concentration (log ppm) for tissues (or depletion of Se availability) in the Se-applied plots decreased linearly for at least the first three cropping seasons.

scholarly journals Red clover grown in a mixture with grasses : yield, persistence and dynamics of quality characteristics

2003 ◽  
Vol 12 (3-4) ◽  
pp. 195-212 ◽  
Author(s):  
T. MELA
Keyword(s):  
Field Experiments ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Forage Yield ◽  
Crude Fibre ◽  
Meadow Fescue ◽  
Forage Crop ◽  
Trifolium Pratense L ◽  
Yield Quality ◽  
Accumulated Temperature

Red clover (Trifolium pratense L.) was grown in mixtures with timothy and meadow fescue in field experiments at four sites in Finland to broaden knowledge on its potential as a forage crop. The effects of cutting frequency, nitrogen fertilization in the spring and sward density were investigated. Forage yield quality was analyzed using standard methods. Red clover produced well in all swards during the two first seasons. In the third summer the proportion of red clover was greatly diminished except on sandy soil at the northernmost locality (64°40'N) where it remained productive. Linear regression adequately described the dependence of crude fibre content and crude protein content in dry matter of the primary growth and regrowth, both of red clover and grass, on accumulated temperature sum. The contents of P, K, Ca and Mg in clover and grass are given as a function of accumulated temperature to describe their changes during crop growth. The results give new knowledge about possibilities to grow red clover in the northern livestock region of Finland. They proved that soil type is more important for good persistence of red clover than latitude.

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

Influence of destructive bacteria and red clover (trifolium pratense L.) on the pesticides degradation in the soil

2021 ◽  
Author(s):  
Elmira A. Nazarova ◽  
Alexey V. Nazarov ◽  
Daria O. Egorova ◽  
Ludmila N. Anan’ina
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

AN ASSESSMENT OF THE SOIL ACIDITY PROBLEM IN ALBERTA AND NORTHEASTERN BRITISH COLUMBIA

1977 ◽  
Vol 57 (2) ◽  
pp. 157-164 ◽  
Author(s):  
D. C. PENNEY ◽  
M. NYBORG ◽  
P. B. HOYT ◽  
W. A. RICE ◽  
B. SIEMENS ◽  
...  
Keyword(s):  
British Columbia ◽  
Soil Ph ◽  
Soil Acidity ◽  
Field Experiments ◽  
Trifolium Pratense ◽  
Acid Soil ◽  
Acid Soils ◽  
Red Clover ◽  
Hordeum Vulgare L ◽  
Crop Species

The amount of cultivated acid soil in Alberta and northeastern British Columbia was estimated from pH values of farm samples analyzed by the Alberta Soil Testing Laboratory, and the effect of soil acidity on crops was assessed from field experiments on 28 typical acid soils. The field experiments consisted of two cultivars of barley (Hordeum vulgare L.) and one cultivar each of rapeseed (Brassica campestris L.), red clover (Trifolium pratense L.) and alfalfa (Medicago sativa L.) grown with and without lime for 2 yr. There are about 30,000 ha of soils with a pH of 5.0 or less where soil acidity seriously restricts yields of all four crop species. There are approximately 300,000 ha with a soil pH of 5.1–5.5 where liming will on the average increase yields of alfalfa by 100%, yields of barley by 10–15%, and yields of rapeseed and red clover by 5–10%. There are a further 1,600,000 ha where soil pH ranges from 5.6 to 6.0 and liming will increase yields of alfalfa by approximately 50% and yields of barley, rapeseed and red clover by at least 4–5%.

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