Adequate management of post-fire defoliation would not affect the metabolic activity of axillary buds in grasses

被引:2
|
作者
Ithurrart, Leticia S. [1 ]
Busso, Carlos A. [1 ]
Torres, Yanina A. [2 ]
Giorgetti, Hugo D. [3 ]
Rodriguez, Gustavo D. [3 ]
Ambrosino, Mariela L. [4 ]
机构
[1] UNS, Consejo Nacl Invest Cient & Tecn Republ Argentina, Dept Agron CERZOS, San Andres 800, RA-8000 Bahia Blanca, Buenos Aires, Argentina
[2] UNS, Dept Agron, CIC Cornish 5n Invest Cient Prov Buenos Aires, San Andres 800, RA-8000 Bahia Blanca, Buenos Aires, Argentina
[3] Minist Asuntos Agr, Chacra Expt Patagones, Olivera 67, RA-8504 Carmen De Patagones, Argentina
[4] Univ Nacl La Pampa, Fac Ciencias Exactas & Nat, CERZOS CONICET, Ruta Nacl 35,Km 334, RA-6300 Santa Rosa, Argentina
关键词
PERENNIAL GRASSES; VIABILITY; FIRE; TILLER; GRASSLAND; BANKS; FREQUENCY; GROWTH;
D O I
10.5735/085.056.0412
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Controlled burning is often used to improve plant structure on rangelands adapted to fire. However, possible damage resulting from post-fire grazing to reappearing desirable plant species may be a serious issue hindering usage of this method. Axillary buds are essential for the re-establishment of the photosynthetic leaf area. We studied if post-bum defoliation affects the number of axillary buds and/or their metabolic activity in Pea ligularis. Nassella tenuis (both desirable plant species) and Amelichloa amhigua (undesirable plant species). We found that the treatments limited neither bud production nor their metabolic activity. The greatest number of total and viable buds in the studied plant species was recorded at the vegetative stage. Pea ligularis had the lowest bud number per tiller but the greatest per plant. Our results thus indicate that moderate defoliation after controlled burning does not affect the survival and productivity of the desirable species.
引用
收藏
页码:267 / 276
页数:10
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