Data/hora: 09/06/2024 05:55:56

Biblioteca(s): | Embrapa Territorial.
Data corrente: | 15/12/2014
Data da última atualização: | 01/06/2017
Autoria: | TEIXEIRA, A. H. de C.; VICTORIA, D. de C.; ANDRADE, R. G.; LEIVAS, J. F.; BOLFE, E. L.; CRUZ, C. R.
Afiliação: | ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; DANIEL DE CASTRO VICTORIA, CNPM; RICARDO GUIMARAES ANDRADE, CNPM; JANICE FREITAS LEIVAS, CNPM; EDSON LUIS BOLFE, CNPM; CAROLINE R. CRUZ, PUC-CAMPINAS.
Título: | Coupling MODIS images and agrometeorological data for agricultural water productivity analyses in the Mato Grosso State, Brazil.
Ano de publicação: | 2014
Fonte/Imprenta: | Remote Sensing for Agriculture, Ecosystems, and Hydrology, v. 9239, p. 92390W-1-92390W-4,2014.
ISBN: | 0277-786X
DOI: | 10.1117/12.2065967
Idioma: | Português
Notas: | Presented at the 16th Remote Sensing for Agriculture, Ecosystems, and Hydrology.
Conteúdo: | Mato Grosso state, Central West Brazil, has been highlighted by the grain production, mainly soybean and corn, as first (November-March) and second (April-August) harvest crops, respectively. For water productivity (WP) analyses, MODIS products together with a net of weather stations were used. Actual evapotranspiration (ET) and biomass production (BIO) were acquired during the year of 2012 and WP was considered as the ratio of BIO to ET. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) for ET and the Monteith's radiation model for BIO were applied together, considering a mask which separated the agricultural crops from other surface types. In relation to the first harvest crop ET, BIO and WP values above of those for other surface types, happened only from November to January with incremental values reaching to 1.2 mm day-1; 67 kg ha-1 day-1; and 0.7 kg m-3, respectively; and between March and May for the second harvest crops, with incremental values attaining 0.5 mm day-1; 27 kg ha-1 day-1; and 0.3 kg m-3, respectively. In both cases, during the growing seasons, the highest WP parameters in cropped areas corresponded to the blooming to grain filling transition. Considering corn crop, which nowadays is increasing in terms of cultivated areas in the Brazilian Central West region, and crop water productivity (CWP) as the ratio of yield to the amount of water consumed, the main growing regions North, Southeast and Northeast were analysed. Southeast growing region presented the highest annual pixel averages for ET, BIO and CWP (1.7 mm day-1, 78 kg ha-1 day-1 and 2.2 kg m-3, respectively); while for Northeast growing region they were the lowest ones (1.2 mm day-1, 52 kg ha-1 day-1and 1.9 kg m-3). Throughout a soil moisture indicator, the ratio of precipitation (P) to ET, it was indeed noted that rainfall was enough for a good grain yield, with P/ET lower than 1.00 only outside the crop growing seasons.
Palavras-Chave: | Soybean.
Thesaurus Nal: | Biomass production; Corn; Evapotranspiration.
Categoria do assunto: | --
Registro original: | Embrapa Territorial (CNPM)
Exemplares: | CNPM - (4243-1) - UPC - AP - DD - 14/092 - AP - 2014.092 - DIS