A simulation model of kenaf [Hibiscus cannabinus] for assisting fibre industry planning in northern Australia, 3. Model description and validation
1992
Carberry, P.S. (Commonwealth Scientific and Industrial Research Organisation, Aitkenvale (Australia). Div. of Tropical Crops and Pastures) | Muchow, R.C. (Commonwealth Scientific and Industrial Research Organisation, St Lucia (Australia). Div. of Tropical Crops and Pastures)
NTKENAF (Version 1.1) is a computer model which simulates the growth of kenaf under rainfed conditions in tropical Australia. In daily time-steps, the model simulated the phenology, leaf area development, biomass accumulation and partitioning, soil water balance and dry matter yields of kenaf plants based on climatic and management inputs. The model assumes adequate nutrition and no effect of pests and diseases. The model uses daily maximum and minimum temperature, solar radiation and rainfall. The duration from sowing to flowering is predicted using temperature and photoperiod. Leaf growth is described as a function of node production (as determined by temperature), leaf area per node and leaf area senescence. Potential daily biomass is predicted from leaf area index, the light extinction coefficient and radiation use efficiency, and partitioned to the economic stem yield. Soil evaporation is predicted using a two-stage evaporation model, and plant transpiration is predicted from the daily biomass accumulation, a transpiration efficiency coefficient and predicted daily vapour pressure deficit. NTKENAF V1.1 has been validated against observed data from kenaf experiments conducted at 2 sites in northern Australia. The predictive accuracy of the model was good over a range in above-ground biomass up to 25 000 kg per ha.
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