01696naa a2200289 a 450000100080000000500110000800800410001910000190006024500740007926000090015352009830016265000170114565000120116265000200117465000100119465000220120465300090122665300100123565300190124565300140126465300110127865300120128965300210130165300120132270000160133477300560135010541271997-04-15       1984    bl ---       0--  u    #d1 aSHACKEL, K. A.  aEffect of intercropping on the water relations of sorghum and cowpea.  c1984  aSorghum (Sorghum bicolor (L.) Walp.) and cowpea (Vigna unguiculata (L.) Walp.) were grown as sole-crops or as an intercrop under frequently irrigated and water-limited field conditions to test the hypothesis that competition for soil moisture would influence the water relations of these two species. Measurements of xylem pressure potential and osmotic potential were made at predawn and midday throughout a summer growing season. Sorghum and cowpea exhibited contrasting levels of dehydration avoid-ance when grown as sole-crops, but intercropping did not cause any substantial change in the water relations of either species. Midday xylem pressure potential and osmotic potential of cowpea leaves were slightly higher in the intercropped than in the sole-crop-pedtreatment, presumably as a result of partial shading by the sorghum plants. The total quantities and patterns of soil water depletion were similar for both species as solecrops and for the intercropped treatment.  awater stress  aFeijão  aSorghum Bicolor  aSorgo  aVigna Unguiculata  aBean  aCaupi  aConsorciação  aConsorcio  aCowpea  aCultivo  aEstresse hidrico  aSorghum1 aHALL, A. E.  tField Crops Researchgv. 8, n. 5, p. 381-387, 1984.