نتایج جستجو برای: semi steppe rangelands

تعداد نتایج: 147987  

Hamid Niknahad Gharmakher, Mashad Gholi Maramaei Masoumeh Ahmadi Beni Mojgan Sadat Azimi

Abstract. Information on forage quality in phenological stage could help range managers to choose suitable grazing method to achieve higher animal performance without detriment to vegetation. Vetiver grass (Vetiveria zizanioides) is a non-native perennial grass that was introduced to the Iran in 2008. This plant is a multi use species that could be considered from different viewpoints. Thus, it...

Journal: :Agronomy 2021

Effective grazing management in Australia’s semi-arid rangelands requires monitoring landscape conditions and identifying sustainable productive practice through understanding the interactions of environmental factors soil health. Challenges include extreme rainfall variability, intensifying drought, inherently nutrient-poor soils. We investigated impacts strategies on function—specifically hea...

Journal: :African Journal of Range & Forage Science 2022

This study evaluated the bromatological and histological features of native African grasses under grazing in Brazilian semi-arid rangelands. An experimental grid design was used a randomised sampling method for four replicate samples three grasses. The were: Cenchrus ciliaris L., Digitaria pentzii Stent. Megathyrsus maximus (Jacq.). traits analysed included dry matter (DM), crude protein (CP), ...

Journal: :Remote Sensing 2022

The frequency of extreme climate events has increased resulting in major changes to vegetation arid and semi-arid areas. We selected 12 indices used trend analysis multiple linear regression models analyze trends steppe areas Inner Mongolia their impact on the normalized difference index (NDVI). From 1998 2017, NDVI overall; however, there was a small area decrease. Extreme related warming exhi...

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The aim of this study is investigates the effects of different patches shrubs on the soil surface indicators in Gub Gugeh rangelands, in Golestan Province. The sampling was taken along transects of 50 meters, which are 10 meters away from each other. Via LFA models, three factors of stability, infiltration and nutrient cycling using 11 indicators of surface soil in patch and inter-patch were me...

Journal: :African Journal of Range & Forage Science 2021

(2021). Montane rangelands in a changing world. African Journal of Range & Forage Science: Vol. 38, Rangelands Changing World, pp. iii-vi.

2013
Matt Lavin Tyler J Brummer Ryan Quire Bruce D Maxwell Lisa J Rew

Fire is thought to profoundly change the ecology of the sagebrush steppe. The Idaho National Laboratory provides an ideal setting to compare the effects of fire and physical disturbance on plant diversity in high-native-cover sagebrush steppe. Seventy-eight 1-hectare transects were established along paved, green-striped, gravel, and two-track roads, in overgrazed rangeland, and within sagebrush...

Introduction: Allelopathy refers to the plants’ mutual biochemical effects. Despite their significant role in improving and restoring Iranian rangelands, the plants’ allelopathic effects on each other have often been neglected in rangeland seeding. Scholars argue that in stressful conditions of the arid areas caused by low precipitation, the effects of metabolic chemicals secreted by allelochem...

2007
Marilyn D. Walker Donald A. Walker Kaye R. Everett Susan K. Short MARILYN D. WALKER

The hypothesized presence of large regions of grass and forb-dominated "steppe tundra" across Alaska and Siberia during the Pleistocene glacial epochs has led to a search for modern analogs. Evidence is presented for the presence of steppe vegetation on south-facing slopes and summits of pingos within the central Arctic Coastal Plain of Alaska. Vegetation, floristics, soils, and climatic factor...

2010
Grant D. Zazula Glen MacKay Thomas D. Andrews Beth Shapiro Brandon Letts Fiona Brock

A partial steppe bison (Bison priscus) carcass was recovered at Tsiigehtchic, near the confluence of the Arctic Red and Mackenzie Rivers, Northwest Territories, Canada in September of 2007. The carcass includes a complete craniumwith horn cores and sheaths, several complete post-cranial elements (many of which have some mummified soft tissue), intestines and a large piece of hide. A piece of me...

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