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A soybean growth model based on compensatory growth following defoliation
Author(s) -
Kawamoto Hitoshi,
Saito Takashi,
Kiritani Keizi
Publication year - 1986
Publication title -
ecological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.628
H-Index - 68
eISSN - 1440-1703
pISSN - 0912-3814
DOI - 10.1007/bf02347021
Subject(s) - dry matter , yield (engineering) , growth model , dynamic simulation model , plant growth , agronomy , mathematics , environmental science , biology , computer science , physics , mathematical economics , simulation , thermodynamics
On the basis of an artificial defoliation experiment, a new growth model of soybean was formulated through a modification of Rudd's (1980) model with regard to his equations for dry matter allocation. Compensatory growth for leaf damage was modelled by a single process in which the dry matter allocation changes dynamically according to the severity of leaf damage. The sums of squared differences between simulations and experimental soybean yields were much smaller in our modified model than in Rudd's original model. The modified model gave a better simulation of yield loss due to defoliation that varied in time and intensity. The relationship between various times and intensities of defoliation and yield loss was shown, which is essential for establishing the dynamic economic injury level in IPM.