Abstract:

In this study, products and key enzyme activities of carbon-nitrogen metabolism of cassava leaf were investigated under the different interplanting row spacing (30, 40, 50 cm) and root system separation treatment. The results indicated that 40 cm row spacing interplanting peanut might enhance the sucrose phosphate synthase (SPS), sucrose synthase (SS) activity and the soluble sugar content of cassava. After interplanting peanut, amino acid and the soluble protein contents of cassava reduced with decreasing of the row spacing. On the contrary, nitrate reductase (NR) activity significantly increased. In the same row spacing, the amino acid, the protein content and SPS, SS, glutamine synthase (GS) activity of cassava without separating root were higher than separating root treatment, there were interaction in root system between cassava and peanut. In a word, the suitable interplanting row spacing might raise the key enzyme activities of carbon and nitrogen metabolism, and then the promoting accumulation and the translocation of carbohydrate and the protein, so it had important significance for increasing yield and quality of cassava.