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Modeling Daily Dry Matter Production of Winter Wheat 1
Author(s) -
Hodges Tom,
Kanemasu E. T.
Publication year - 1977
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1977.00021962006900060018x
Subject(s) - photosynthesis , dry matter , sink (geography) , biomass (ecology) , agronomy , environmental science , winter wheat , respiration , leaf area index , primary production , chemistry , botany , biology , ecology , ecosystem , cartography , geography , biochemistry
Applicability of many plant growth models are limited because of the input data requirements. Photosynthesis and respiration equations were developed from meteorological data that could easily be obtained. The single crop parameter required was leaf area index. These equations were developed for winter wheat from measurement of net CO 2 exchange with field chambers and an infrared‐gas‐analysis system. Higher gross photosynthesis rates after jointing were attributed to sink enhancement of photosynthesis. Respiration was estimated as a photosynthesis‐dependent growth component and a temperature‐biomass dependent maintenance component. The equations predicted dry matter production that agreed favorably with observed dry matter accumulation.