کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6303576 | 1618260 | 2013 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rangeland management impacts on the properties of clayey soils along grazing gradients in the semi-arid grassland biome of South Africa
ترجمه فارسی عنوان
مدیریت مراتع بر خواص خاک های خاکستری در حوضه های شیب دار در بیوم خلیجانی نیمه خشک آفریقای جنوبی تاثیر می گذارد
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کلمات کلیدی
چراغ دائمی، پوسفره، سیستم های مدیریت مرتع، چراغ چرخشی، سازه های خاک، ماده آلی خاک،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
The grassland biome of South Africa is a major resource for livestock farming; yet the soils of these rangelands are stressed differently by various management systems. The aim of this study was to investigate how basic soil properties respond to different management systems. For this purpose we sampled rangeland management systems under communal (continuous grazing), commercial (rotational grazing) and land reform (mixture of grazing systems) farming. Within each of these systems a grazing gradient was identified with decreasing grazing pressure with increasing distance to the water points. Results showed that communal farms with continuous grazing were generally depleted in the respective nutrient stocks. The depletion increased with rising grazing pressure. Along that line there was a breakdown of macroaggregates with losses of the C and N stored therein. However, the commercial farms also exhibited a decline of macroaggregates and their associated C content nearby the water points. Aggregate fractionation is a sensitive indicator for detecting the beginning of soil degradation in this biome; yet, degradation was less pronounced under the rotational grazing of the commercial farms than under communal property right conditions. Hence, soil analyses confirm that fences and appropriate grazing periods are needed to manage these rangelands sustainably.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Arid Environments - Volume 97, October 2013, Pages 220-229
Journal: Journal of Arid Environments - Volume 97, October 2013, Pages 220-229
نویسندگان
E. Kotzé, A. Sandhage-Hofmann, J.-A. Meinel, C.C. du Preez, W. Amelung,