Arid
Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year
Greco, Silvina A.1; Sartor, Carmen E.1; Villagra, Pablo E.1,2
通讯作者Greco, Silvina A.
来源期刊REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS
ISSN1853-8665
出版年2013
卷号45期号:2页码:197-209
英文摘要

In deserts, seedling emergence occurs only after precipitation threshold has been exceeded, however, the presence of trees modifies micro-environmental conditions that might affect the effectiveness of a water pulse. In the Monte desert, Prosopis flexuosa trees generate different micro-environmental conditions that might influence grass seedlings establishment. The objective of this work was: a) to know the effective minimum water input event that triggers the emergence of native perennial grass seedlings; b) to relate this fact with the effect of the shade of P. flexuosa canopy and the seasonal temperatures. Three important forage species of the Monte were studied: Pappophorum caespitosum and Trichloris crinita, with C4, and Jarava ichu, with C3 metabolism. Each season, seeds of these species were sown in pots placed at two light conditions: shade (similar to P. flexuosa cover) and open area, and with seven irrigation treatments (0, 10, 20, 30, 40, 2(star)10 and 3(star)10 mm). J. ichu did not emerge in any of the treatments. Significant seedling emergence was registered for P. caespitosum and T. crinita in shade conditions with 40 mm irrigation treatment in summer. Since 40 mm precipitation events are infrequent in the Monte, seedling emergence for these species would be restricted to exceptional rainy years. The facilitating effect of P. flexuosa shade would be important during the hot season.


英文关键词Monte Desert perennial grasses water requirement facilitation seedling emergence shade season
类型Article
语种英语
国家Argentina
收录类别SCI-E
WOS记录号WOS:000329406600015
WOS关键词PROSOPIS-FLEXUOSA ; SUCCESSIVE WET ; DRY YEARS ; DYNAMICS ; ECOSYSTEMS ; PLANT ; GERMINATION
WOS类目Agriculture, Multidisciplinary
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/179818
作者单位1.Univ Nacl Cuyo, Fac Ciencias Agr, RA-5500 Mendoza, Argentina;
2.CCT Mendoza CONICET, Dpto Dendrocronol & Hist Ambiental, Inst Argentino Nivol Glaciol & Ciencias Ambiental, RA-5500 Mendoza, Argentina
推荐引用方式
GB/T 7714
Greco, Silvina A.,Sartor, Carmen E.,Villagra, Pablo E.. Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year[J],2013,45(2):197-209.
APA Greco, Silvina A.,Sartor, Carmen E.,&Villagra, Pablo E..(2013).Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year.REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS,45(2),197-209.
MLA Greco, Silvina A.,et al."Minimum water input event for seedling emergence of three native perennial grasses of the Central Monte desert (Argentina) influenced by the effect of shade and the season of the year".REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS 45.2(2013):197-209.
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