التنافس البيني و النوعي و نسبة المكافئ الأرضي لبعض نظم تحميل الذرة الشامية و اللوبيا

الملخص EN

Two field experiments were carried out at the Exp.

Farm of Nasser’s Faculty of Agric. Sci., Lahej Governorate Aden Univ.

during 96/97 and 97/1998 seasons to study the effect of some intercropping systems on yield of maize cultivar Knega 36 and Local Cultivar of cowpea. The experiment included 6 treatments, inter cropping systems and pure planting for maize and cowpea with the following criteria : - ( 1:1 ) A line maize and a line cowpea . - ( 2:1 ) Two lines maize and one line cowpea . - ( 2:2 ) Two lines maize and two lines cowpea . - ( 1:2 ) A line maize and two lines cowpea . - Without intercropping ( maize pure planting ) . - Without intercropping ( cowpea pure planting ). Randomized complete block design with three replicates and 6 treatments were used . Results indicated that, the intercropping systems not affected significantly on 100 seeds weight for maize in both seasons and cowpea in first season but increased significantly in second season. The pure planting for cowpea lead to increase significantly grain yield/ plant compared with inter cropping systems in both seasons and no effect significantly in this character for maize in both Seasons. The total yield per faddan decreased for maize and cowpea in intercropping systems and increased in pure planting in both seasons. Intercropping systems effected on the Land Equivalent Ratio ( LER) , the inter cropping system (1 :2) and (1:1) gave the higher crop advantage arrived to 1.18 ،1.20 and 1.09,103 in both seasons respectively , while intercropping system (2 :1)do not achieved crop advantage and it was less than one .