Leaf Chlorophyll of Corn, Sweet basil and Borage under Intercropping System in Weed

Abstract — I nte rcopping is oe f the s ust ainableag lturlfactors.TheSPAD metercan be used to predict nitrogen indexreliably, it may also be a useful tool for assessing the relative impactof weeds on crops. In order to study the effect of weeds on SPAD incorn ( Zea mays L.), sweet basil ( Ocimum basilicum L.) and borage( Borago officinalis L.) in intercropping system, a factorial experimentwas conducted in three replications in 2011. Experimental factorswere included intercropping of corn with sweet basil and borage indifferent ratios (100:0, 75:25, 50:50, 25:75 and 0:100 corn: borage orsweet basil) and weed infestation (weed control and weedinterference). The results showed thatintercropping of corn withsweet basiland borage increased the SPAD value of corn compare tomonoculture in weed interference condition. Sweet basil SPAD valuein weed control treatments (43.66) was more than weed interferencetreatments (40.17). Corn could increase the borage SPAD valuecompare to monoculture in weed interference treatments.