In this study,products and key enzyme activity of carbon-nitrogen metabolism of peanut leaf were investigated under the different intercopping row spacing( 30,40,50 cm) and root system separation treatment. The result indicated that cassava-peanut intercropping made the soluble sugar content,amino acid content,the the sucrose phosphate synthase( SPS),sucrose synthase( SS) activity and nitrate reductase( NR),glutamine synthase( GS) activity decrease,the suitable row intercroping treatment could increase the ...