ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS
ABSTRACT Crop water monitoring is an important aspect for precise control of irrigation. A reliable and movable technique is needed to properly assess water uptake of crops in the field. Water uptake by field grown maize ( Zea mays L.), in water-limited conditions was verified with the heat pulse sy...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Campina Grande
1999-08-01
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| Series: | Revista Brasileira de Engenharia Agrícola e Ambiental |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200145&lng=en&tlng=en |
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| _version_ | 1850152775576453120 |
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| author | Antonio Odair Santos Homero Bergamaschi Luís M. G. Rosa João I. Bergonci Bernadete Radin |
| author_facet | Antonio Odair Santos Homero Bergamaschi Luís M. G. Rosa João I. Bergonci Bernadete Radin |
| author_sort | Antonio Odair Santos |
| collection | DOAJ |
| description | ABSTRACT Crop water monitoring is an important aspect for precise control of irrigation. A reliable and movable technique is needed to properly assess water uptake of crops in the field. Water uptake by field grown maize ( Zea mays L.), in water-limited conditions was verified with the heat pulse system. The temperature difference between two radially inserted thermocouples, one 9 mm above and the other 4 mm below a heater piercing the maize stem, was measured every 0.3 sec following emission of a heat pulse in conditions of varied atmospheric demand. Comparisons of heat pulse system outputs and a high precision transpiration model estimates were done on hourly and daily basis, when low sap velocities were expected to occur. Hourly and daily basis of the heat pulse outputs and model estimates were in agreement. Sensitiveness of the technique was observed even for very low sap velocities. |
| format | Article |
| id | doaj-art-a74d5da97ed04ea9ba2785d040a1c95d |
| institution | OA Journals |
| issn | 1807-1929 |
| language | English |
| publishDate | 1999-08-01 |
| publisher | Universidade Federal de Campina Grande |
| record_format | Article |
| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-a74d5da97ed04ea9ba2785d040a1c95d2025-08-20T02:25:53ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-19291999-08-013214514910.1590/1807-1929/agriambi.v3n2p145-149S1415-43661999000200145ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONSAntonio Odair SantosHomero BergamaschiLuís M. G. RosaJoão I. BergonciBernadete RadinABSTRACT Crop water monitoring is an important aspect for precise control of irrigation. A reliable and movable technique is needed to properly assess water uptake of crops in the field. Water uptake by field grown maize ( Zea mays L.), in water-limited conditions was verified with the heat pulse system. The temperature difference between two radially inserted thermocouples, one 9 mm above and the other 4 mm below a heater piercing the maize stem, was measured every 0.3 sec following emission of a heat pulse in conditions of varied atmospheric demand. Comparisons of heat pulse system outputs and a high precision transpiration model estimates were done on hourly and daily basis, when low sap velocities were expected to occur. Hourly and daily basis of the heat pulse outputs and model estimates were in agreement. Sensitiveness of the technique was observed even for very low sap velocities.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200145&lng=en&tlng=enfluxo de seivatranspiraçãoestresse hídricopulso de calor |
| spellingShingle | Antonio Odair Santos Homero Bergamaschi Luís M. G. Rosa João I. Bergonci Bernadete Radin ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS Revista Brasileira de Engenharia Agrícola e Ambiental fluxo de seiva transpiração estresse hídrico pulso de calor |
| title | ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS |
| title_full | ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS |
| title_fullStr | ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS |
| title_full_unstemmed | ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS |
| title_short | ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS |
| title_sort | assessment of corn water uptake based on sap heat tracing under water stressed conditions |
| topic | fluxo de seiva transpiração estresse hídrico pulso de calor |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200145&lng=en&tlng=en |
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