Nitrogen Recoveries and Yields Improvement in Cowpea sorghum and Fallow sorghum Rotations in West Africa Savannah  

作　　者：Boubie Vincent Bado Frangois Lompo Andre Bationo Zacharie Segda Michel Papaoba Sedogo MichelPierre Cescas Valere Cesse Mel 

机构地区：[1]INERA, Station de Farak6-Ba BP 910 Bobo-Dioulasso, Burkina Faso [2]INERA, 03 BP 7192 Ouagadougou, Burkina Faso [3]TSBF/CIATc/o ICRAF, P.O. Box 30677, NairobL Kenya [4]FSSA, Comtois 2219, Universit Laval, Qudbec (QC) G1K 7P4, Canada [5]AfricaRice, Sahel Regional Station, BP 96 Saint-Louis, Sdndgal

出　　处：《Journal of Agricultural Science and Technology(B)》2012年第7期758-767,共10页农业科学与技术（B）

摘　　要：The effects of previous cowpea （Vignaunguiculata） and annual fallow on N recoveries, succeeding sorghum yields and soil properties were studied using a 5-year-old （1995-1999） field experiment at Kouar6 （11°59′ North, 0°19′ West and 850 m altitude） in Burkina Faso. A 3 4 factorial design in a split plot arrangement with three rotation treatments and four fertilizer treatments was used. Total N uptake by succeeding sorghum increased from 26 kg N ha~ in mono cropping of sorghum to 31 and 48 kg N ha~ when sorghum was rotated with fallow or cowpea respectively. Nitrogen derived from fertilizer increased from 10% in mono cropping of sorghum to 22% and 26% when sorghum was rotated with fallow or cowpea respectively. While fallow did not increase N derived from soil, cowpea doubled the quantity of N derived from soil （Ndfs）. Sorghum grain yields increased from 75% and 100% when sorghum was rotated with fallow or cowpea respectively. All rotations treatments decreased soil organic C and N but soil organic C was the highest in fallow-sorghum rotation. It was concluded that cowpea-sorghum rotation was more effective than fallow-sorghum rotation and five management options were suggested to improve traditional system productivity.

关 键 词：Crop rotations FALLOW fertilizer LEGUME soil. 

分 类 号：S514[农业科学—作物学] TQ937[化学工程]