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Báo cáo khoa học: "Effects of livestock and prescribed fire on coppice growth after selective cutting of Sudanian savannah in Burkina Fas"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Effects of livestock and prescribed fire on coppice growth after selective cutting of Sudanian savannah in Burkina Faso. | Ann. For. Sci. 59 2002 185-195 INRA EDP Sciences 2002 DOI 10.1051 forest 2002005 185 Original article Effects of livestock and prescribed fire on coppice growth after selective cutting of Sudanian savannah in Burkina Faso Louis Sawadogoa Robert Nygảrdb and Franẹois Palloa a CNRST INERA Departement Production Forestiere BP 10 Koudougou Burkina Faso b Swedish University of Agricultural Sciences SLU 901 83 Umeả Sweden Received 8 January 2001 accepted 28 September 2001 Abstract - Can livestock grazing and or fire regimes be used to promote coppice growth in Sudanian savannah silviculture Effects of livestock and prescribed fire regimes on stool sprouting after selective cutting were followed during 6 years. Half the initial basal area at stump height of 10.8 m2 ha-1 500 stems ha-1 was cut on 48 plots of 0.25 ha each. In a split-plot design with and without livestock the effects of annual early fire as soon as possible after end of the rainy season no fire and 2 years without fire were tested. With moderate 50 of the potential grazing of 0.7 TLU ha-1 stump mortality decreased and basal area per stool stems 10 cm GBH increased which we assume was due to reduced sprout grass competition. Fire regimes had no major impact and no significant interaction was found. Six years after cutting coppice basal area was 1.1 m2 ha-1 corresponding to a recovery of 20 of the initially removed area. grazing browsing early fire stool sprouting fuelwood Résumé - Effets du pâturage et du feu prescrit sur revolution d un taillis après coupe selective d une savane soudanienne au Burkina Faso. Le pâturage et ou le regime de feu peuvent-ils être utilises pour promouvoir la croissance des rejets de souche après coupe en savane soudanienne Les effets du pâturage et d un regime de feu prescrit sur revolution d un taillis après coupe selective ont été etudies pendants six annees. La moitie de la surface terrière initiale à hauteur de souche de 10 8 m2 ha-1 500 tiges ha-1 a ete coupee sur 48 .