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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
20/03/2002 |
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Data da última atualização: |
18/07/2018 |
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Autoria: |
LAMBERT, J. L. |
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Afiliação: |
University of Wisconsin. |
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Título: |
The hydrologic and growth responses of a young pine plantation to weed removal. |
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Ano de publicação: |
1970 |
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Fonte/Imprenta: |
Wisconsin: University of Wisconsin, 1970. |
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Páginas: |
73p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Thesis. |
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Conteúdo: |
The objectives of this study were to observe the influence of weed removal on the water balance and growth of a red pine (Pinus resinosa, Ait.) plantation. A site was selected on sandy soil Adams County, Wisconsin where stress appeared likely. In May, 1969 the weed vegetation on one plot in a seven-year-old plantation was killed using herbicides. Precipitation, soil water storage, and drainage were monitored throughout the 1969 growing season and until the cessation of height growth in the summer of 1970. Tree heights and diameters were measured at weekly intervals during this same period, and detailed measurements on tree needle water status were made in 1970. In the course of the study a spodic horizon was encountered in the soil profile and its hydraulic properties were measured in detail. The capillary conductivity of the spodic horizon was found to be greater than that of the soil profile above it during wet conditions, as after a heavy rainfall. At water potentials below 60 mb, it appeared to impede water movement, which wold greatly hinder plants extraction of water from lower depths of the profile. Water retention of this horizon was greater than the rest of the profile only at potentials above 60 mb at times when rapid drainage is occurring. Of the 27 cm of precipitation that occured in June, July, and August of 1969, evapotranspiration accounted for 16 cm on a plot with weeds and only 9 cm on the plot without weeds. Nearly all of this excess was lost from the root zone by a 61 percent increase in... MenosThe objectives of this study were to observe the influence of weed removal on the water balance and growth of a red pine (Pinus resinosa, Ait.) plantation. A site was selected on sandy soil Adams County, Wisconsin where stress appeared likely. In May, 1969 the weed vegetation on one plot in a seven-year-old plantation was killed using herbicides. Precipitation, soil water storage, and drainage were monitored throughout the 1969 growing season and until the cessation of height growth in the summer of 1970. Tree heights and diameters were measured at weekly intervals during this same period, and detailed measurements on tree needle water status were made in 1970. In the course of the study a spodic horizon was encountered in the soil profile and its hydraulic properties were measured in detail. The capillary conductivity of the spodic horizon was found to be greater than that of the soil profile above it during wet conditions, as after a heavy rainfall. At water potentials below 60 mb, it appeared to impede water movement, which wold greatly hinder plants extraction of water from lower depths of the profile. Water retention of this horizon was greater than the rest of the profile only at potentials above 60 mb at times when rapid drainage is occurring. Of the 27 cm of precipitation that occured in June, July, and August of 1969, evapotranspiration accounted for 16 cm on a plot with weeds and only 9 cm on the plot without weeds. Nearly all of this excess was lost from the root ... Mostrar Tudo |
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Palavras-Chave: |
Pine; Pinho; Planta daninha; Weed. |
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Thesagro: |
Água; Solo. |
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Thesaurus Nal: |
Pinus resinosa; soil; water. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02120nam a2200241 a 4500
001 1790738
005 2018-07-18
008 1970 bl uuuu m 00u1 u #d
100 1 $aLAMBERT, J. L.
245 $aThe hydrologic and growth responses of a young pine plantation to weed removal.
260 $aWisconsin: University of Wisconsin$c1970
300 $a73p.
500 $aPh.D. Thesis.
520 $aThe objectives of this study were to observe the influence of weed removal on the water balance and growth of a red pine (Pinus resinosa, Ait.) plantation. A site was selected on sandy soil Adams County, Wisconsin where stress appeared likely. In May, 1969 the weed vegetation on one plot in a seven-year-old plantation was killed using herbicides. Precipitation, soil water storage, and drainage were monitored throughout the 1969 growing season and until the cessation of height growth in the summer of 1970. Tree heights and diameters were measured at weekly intervals during this same period, and detailed measurements on tree needle water status were made in 1970. In the course of the study a spodic horizon was encountered in the soil profile and its hydraulic properties were measured in detail. The capillary conductivity of the spodic horizon was found to be greater than that of the soil profile above it during wet conditions, as after a heavy rainfall. At water potentials below 60 mb, it appeared to impede water movement, which wold greatly hinder plants extraction of water from lower depths of the profile. Water retention of this horizon was greater than the rest of the profile only at potentials above 60 mb at times when rapid drainage is occurring. Of the 27 cm of precipitation that occured in June, July, and August of 1969, evapotranspiration accounted for 16 cm on a plot with weeds and only 9 cm on the plot without weeds. Nearly all of this excess was lost from the root zone by a 61 percent increase in...
650 $aPinus resinosa
650 $asoil
650 $awater
650 $aÁgua
650 $aSolo
653 $aPine
653 $aPinho
653 $aPlanta daninha
653 $aWeed
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Registro original: |
Embrapa Pantanal (CPAP) |
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