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| Sanches,Arthur Carniato; Souza,Débora Pantojo de; Jesus,Fernanda Lamede Ferreira de; Mendonça,Fernando Campos; Gomes,Eder Pereira. |
| ABSTRACT: Crop coefficient (Kc) is the ratio between crop evapotranspiration (ETc) and reference evapotranspiration (ETo), representing the phenological effects on crop water consumption. Kc is fundamental to estimating ETc by agrometeorological methods. This research study aimed to determine Kc and ETc values for Guinea grass (Megathyrsus maximus cv. Mombaça) and Bermuda grass (Cynodon spp.), both single cropped for one year and overseeded with black oat (Avena strigosa) and ryegrass (Lolium multiflorum) during fall/winter. The experiment in the field comprised four plots, two for each tropical forage, with and without overseeding. At the center of each plot, there was a weighing lysimeter with an automated system for data collection. ETc was measured... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Lolium multiflorum; Evapotranspiration; Lysimetry; Tropical pastures. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600448 |
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| Pezzopane,José Ricardo Macedo; Santos,Patricia Menezes; Mendonça,Fernando Campos; Araujo,Leandro Coelho de; Cruz,Pedro Gomes da. |
| The objective of this work was to develop and validate linear regression models to estimate the production of dry matter by Tanzania grass (Megathyrsus maximus, cultivar Tanzania) as a function of agrometeorological variables. For this purpose, data on the growth of this forage grass from 2000 to 2005, under dry‑field conditions in São Carlos, SP, Brazil, were correlated to the following climatic parameters: minimum and mean temperatures, degree‑days, and potential and actual evapotranspiration. Simple linear regressions were performed between agrometeorological variables (independent) and the dry matter accumulation rate (dependent). The estimates were validated with independent data obtained in São Carlos and Piracicaba, SP, Brazil. The best statistical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Panicum maximum; Climatic growth index; Degree‑days; Evapotranspiration; Modeling. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000400001 |
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| Araujo,Leandro Coelho de; Santos,Patrícia Menezes; Mendonça,Fernando Campos; Mourão,Gerson Barreto. |
| The objective of this work was to evaluate yield traits and development of palisadegrass under the influence of water deficit during the establishment period. The experiment was carried out in a greenhouse, in a completely random block statistical design in a factorial arrangement and additional treatment (3 × 3 + 1). The treatments referred to the suppression of irrigation at different phases of the establishment (sowing, germination and initial tillerring) until the soil presented water content of 75%, 50%, and 25% of the moisture related to field capacity (qFC), besides control treatment with no water restriction. Evaluations of number of grown tillers per vase, green leaves per tiller and plant height were carried out weekly, for five weeks after the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Drought; Palisadegrass; Tillering; Water deficit. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700002 |
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| Paz,Vital Pedro da Silva; Teodoro,Reges Eduardo Franco; Mendonça,Fernando Campos. |
| Reconhece-se cada vez mais a crescente falta de água para irrigação e outros usos. Também, está-se consciente de que, por sua irregular disponibilidade, a qual varia marcadamente ao longo do ano, de ano a ano e de região a região, o uso da água de forma contínua e indefinida, torna-se impossível. Portanto, uma das metas estratégicas para a preservação da disponibilidade e da qualidade dos recursos hídricos consiste em se estabelecer critérios de uso adequado em todas as atividades produtivas, razão pela qual este trabalho aborda a escassez de água, a agricultura irrigada e o meio ambiente, com base em informações e estudos que possam contribuir para o direcionamento de uma agricultura planejada, conservando e otimizando os recursos naturais. Os modelos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigação; Recursos naturais; Uso eficiente da água. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662000000300025 |
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