Dynamic Simulation Model for Production and Dry Matter Accumulation in Peanut

On the base of the physiological processes and according to the balance of the carbon, a simulation model for photosynthetic production and dry matter accumulation was established for the peanut. The photosynthesis rate of unit green leaf area was scribed by negative exponential function. By analyzing the characteristic of the shoots, the Gaussian integration method was used to calculate the photosynthesis for each period of time, and the daily total canopy photosynthesis which was that of all day. The effects of physiological age, temperature and water deficit factors on maximum photosynthesis rate were adequately quantified. The maintenance respiration and growth respiration was considered in the model which consume some photosynthetic. The computer was used to simulate the progress. The model was tested for dry matter accumulation by the field experiments of different genotypes and water levels and the results showed a good fit between the observed and simulated data. The present model appears to be favorable on mechanism explanation and reliable prediction.