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Simulation model of Oulema melanopus in the winter‐wheat ecosystem 1
Author(s) -
ZEMANKOVICS M. HUNKÁR
Publication year - 1991
Publication title -
eppo bulletin
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.327
H-Index - 36
eISSN - 1365-2338
pISSN - 0250-8052
DOI - 10.1111/j.1365-2338.1991.tb01286.x
Subject(s) - microclimate , canopy , environmental science , overcast , atmospheric sciences , agroecosystem , sunshine duration , ecology , winter wheat , vegetation (pathology) , ecosystem , population , agronomy , meteorology , geography , biology , agriculture , relative humidity , medicine , demography , pathology , sky , sociology , geology
Simulation system sonches (Simulation of Nonlinear Complex Hierarchical Ecological Systems) is a tool for computer‐aided experimental investigation of the dynamic behaviour of ecological systems. A winter‐wheat agroecosystem was modelled with the help of sonches . The whole model consists of several submodels. One of them is the growth‐development model of winter wheat itself. The others are pest models. The model of cereal leaf beetle ( Oulema melanopus ) was investigated. The main driving force in the model is daily mean temperature. The temperature inside the plant canopy is different from the temperature outside it (at the meteorological station). A microclimate model was used to modify the measured temperature values. Simulation experiments were carried out to show the effect of using microclimate data instead of standard meteorological data. The difference between the temperature inside and outside the canopy depends on radiation. The days of the vegetation period were classified by sunshine duration: clear, cloudy and overcast days. Winter wheat treated with different amounts of nitrogen fertilizer has a different canopy structure. The microclimate inside the canopy alters according to density. Results of simulation experiments in the form of population dynamics are presented.