Abstract:

The soil conditions，biomass，productivity and the nutrient accumulation of the Morus alba and peanut intercropping ecological system of two different habitats were studied. The results showed: The physical and chemical properties of the two habitats were obviously different. The average crown width，length of branches，diameter of branches，number of branches and above ground biomass of M. alba in relevant adverse habitat only accounted for 80.00%，70.85%，76.19%，68.46%，67.75% of those in hill terrace sandlot respectively. The total aboveground biomass was 10.64 t·hm^-2 in plain sandlot and 5.65 t·hm^-2 in hill terrace. The biomass of M. alba accounted for 47.84% and peanuts for 52.16%; In hill terrace，M.albaaccounted for 5469% and peanuts for 45 .31%. The annual net productivity of the M.albaand peanut intercropping system in the plain sandlot was 11.11 t·hm^-2a^-1，which was 0.90 times more than that in hill terrace. The total accumulations of 5 elements in two habitats were significantly different，they were 281.98 and 140.80 kg·hm^-2 respectively . In plain sandlots system，M. alba accounted for 37.03% and peanuts accounted for 62.97%; In hill terrace system，M. alba accounted for 45.22% and peanut accounted for 54.78%. The total returned rate of five nutrient elements in the M.albaand peanut intercropping ecological system in hill terrace was 34.43%，which was 23.23% higher than that in plain sandlot.

Key words: Morus alba and peanut intercropping, biomass, nutrient elements