Botanical composition and aroma compounds of semi‐arid pastures in Algeria

2020 ◽  
Author(s):  
Asma Senoussi ◽  
Iris Schadt ◽  
Soraya Hioun ◽  
Haroun Chenchouni ◽  
Zineddine Saoudi ◽  
...  
Keyword(s):  
Aroma Compounds ◽  
Botanical Composition ◽  
Semi Arid

Rangeland condition in relation to environmental variables, grazing intensity and livestock owners' perceptions in semi-arid rangeland in western Iran

2010 ◽  
Vol 32 (4) ◽  
pp. 367 ◽  
Author(s):  
M. Faramarzi ◽  
S. Kesting ◽  
J. Isselstein ◽  
N. Wrage
Keyword(s):  
Environmental Variables ◽  
Management Practices ◽  
Grazing Intensity ◽  
Bare Soil ◽  
Grazing Pressure ◽  
Botanical Composition ◽  
Western Iran ◽  
Range Condition ◽  
Rangeland Condition ◽  
Semi Arid

Rangeland condition has often been assessed in relation to either botanical, edaphic, environmental or management factors. In this investigation, we analysed the interaction of soil and topographic variables, management and range condition against the background of a sociological survey of livestock owners in western Iran to better understand the main influencing factors of rangeland quality in the area. In four grazing areas in Kermanshah differing in grazing pressure, environmental variables and livestock owners’ perceptions on range condition, investigations of botanical composition, soil and topographic variables were carried out on 43 main plots. To evaluate range condition, four factors were considered, namely litter frequency, herbage palatability, amount of biomass, and percentage of bare soil. A questionnaire was used to obtain information about management practices, the perception of livestock owners on range condition and suggested solutions to problems in the different grazing areas. The range condition scores showed that the condition of the sites was either fair or poor. Of the soil and topographic factors, only north-facing aspect explained part of the variation in range condition scores. High grazing intensity was associated with poor range condition. To improve the rangeland condition, measures influencing water availability and a reduction of grazing pressure seem to be more relevant in the study area than fertilisation or seeding.

scholarly journals Diet botanical composition and rumen protozoa of sheep in Brazilian Semi-Arid area

2010 ◽  
Vol 59 (226) ◽  
Author(s):  
I. Martinele ◽  
G.R.A. Santos ◽  
D.S. Matos ◽  
A.M.V. Batista ◽  
M. D'Agosto
Keyword(s):  
Arid Area ◽  
Botanical Composition ◽  
Rumen Protozoa ◽  
Semi Arid

Soil treatment, plant species and management effects on improved pastures on a solodic soil in the semi-arid subtropics. I. Dry matter and botanical composition

1985 ◽  
Vol 25 (2) ◽  
pp. 367 ◽  
Author(s):  
JS Russell
Keyword(s):  
Dry Matter ◽  
Nitrogen Deficiency ◽  
Treatment Plant ◽  
Hydrated Lime ◽  
Grass Species ◽  
Botanical Composition ◽  
Nitrogen And Phosphorus ◽  
Rhodes Grass ◽  
Annual Medics ◽  
Semi Arid

Pastures of Rhodes grass (Chloris gayana), temperate legumes (annual medics) and a tropical legume (siratro) were established on a solodic soil in 1973-74 at Kogan in the semi-arid subtropics of southern Queensland. The effect of soil treatments, sown pasture species and cattle stocking rates on dry matter yields and botanical composition were measured during 1974-79. Nitrogen deficiency was a key factor limiting herbage production. Increased nitrogen in the ecosystem applied as fertilizer increased mean presentation dry matter of Rhodes grass pastures from 990 to 3443 kg/ha. Use of hydrated lime and gypsum (HLG) and annual medics with Rhodes grass increased dry matter yields from 990 to 1773 kg/ha. Where HLG had been applied, the annual medics re-established from seed each autumn and early winter throughout the period studied. Siratro established well at sowing and contributed initially to herbage production but then declined to almost zero. Deep subsoiling had no significant effect on dry matter yields or siratro persistence. Applied phosphorus at 48 kg Plha at establishment significantly increased herbage yields of Rhodes grass compared with 24 kg P/ha but no significant effects at either rate were found with a further 60 kg P/ha applied as 12 kg P/ha.year. Rhodes grass, which is tolerant of high soil sodium and magnesium status, maintained frequencies above 90% in treatments where the levels of nitrogen and phosphorus were high and when grazed at 0.62 steers/ha. However, deterioration occurred where nitrogen and phosphorus were lower or grazing pressure was higher, resulting in an ingress of native grasses. Twenty-five volunteer grass species were identified, the main genera being Eragrostis and Chloris. The need for a self-regenerating annual summer-growing legume in this environment is discussed.

Ferrihydrite dissolution at the root zone of crops under semi-arid condition controls the plant uptake of uranium and arsenic

2020 ◽  
Author(s):  
Arindam Malakar ◽  
Michael Kaiser ◽  
Daniel D. Snow ◽  
Harkamal Walia ◽  
Chittaranjan Ray
Keyword(s):  
Plant Uptake ◽  
Root Zone ◽  
Arid Condition ◽  
Semi Arid

Analysis of buckwheat (Fagopyrum esculentum) aroma compounds with GC-MS

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
D Janež ◽  
D Kantar ◽  
H Prosen ◽  
S Kreft
Keyword(s):  
Aroma Compounds ◽  
Fagopyrum Esculentum
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