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Significant Findings from Ecophysiological Studies Within KUREX-88 and KUREX-91статья
Информация о цитировании статьи получена из
Scopus
Дата последнего поиска статьи во внешних источниках: 19 июля 2016 г.
- Авторы: Vygodskaya N.N., Gorshkova I.I., Varlagin A.V., Oltchev A.V., Tatarinov F.A.
- Журнал: Remote Sensing Reviews
- Том: 17
- Номер: 1-4
- Год издания: 1998
- Первая страница: 149
- Последняя страница: 178
- DOI: 10.1080/02757259809532368
- Аннотация: In KUREX-88 and KUREX-91 the measurements of absorbed Photosynthetically active radiation (APAR), stomatal resistance (Rst), transpiration (E) and net photosynthesis (P) were made for three agricultural crops: spring wheat, buckwheat and corn. Most of the variations in the Rst, E and P were found to be dominated by PAR and difference in temperature between leaf and the atmosphere (T1 - Ta). Parametrizations describing the Rst, E and P responses to environmental factors were developed. The PAR, (T1 - Ta), leaf temperature, humidity of the air and Rst were associated with 60-95% of variations in transpiration coefficient characterizing the efficiency of the water utilization in the dry matter production. Scaling up of energy and mass exchange processes from a leaf to a canopy was studied. Shelter factor (Ps) for the corn crop was estimated as Ps = 0.464 LAI - 0.25. Theoretical and empirical relationships between vegetation indices and APAR, and canopy photosynthesis (Pc) were developed. The simple ratio and normalized difference appear to be nonlinear indicators of APAR and Pc, whereas the greenness and perpendicular vegetation index to be near-linear.
- Добавил в систему: Ольчев Александр Валентинович