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Estimation of aboveground grassland phytomass with a growth model using Landsat TM and climate data

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Estimation of aboveground phytomass in meadow grasslands was carried out using multitemporal satellite data of fine resolution but of low frequency from Landsat TM observations in 1984-1990. We developed two growth models for the estimation of the first-cut yield, based on an exponential plant growth of which initial phytomass was determined using NDVI or TM2/TM3 on the Landsat observation date together with the effective cumulative temperature during the growth period after the observation date. Validations of these models with different data sets of Landsat TM in 1990-1994 indicated that the measured and estimated yields agreed well, suggesting the great potential of applying fine resolution satellite data coupled with a growth model to phytomass study, in spite of the low frequency of observation.

Document Type: Research Article


Publication date: 1999-07-20

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