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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
06/12/2023 |
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Autoria: |
WIGHT, J. R.; BLACK, A. L. |
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Título: |
Range fertilization: plant response and water use. |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Journal Range Management, v. 32, n. 5, p. 345-349, 1979. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: During the 10-year study, herbage production on an unfertilized, mixed prairie range site in eastern Montana averaged 1,047 kg/ha and ranged from 720 to 1,321 kg/ha. Elimination of nitrogen (N) and phosphorus (P) deficiencies by fertilizing increased herbage yields an average of 114% (ranging from a low of 32% in a "dry" year to a high of 218% in a "wet" year). Nitrogen was the major growth-limiting plant nutrient with measurable responses to P occurring only when N was nonlimiting. Single high-rate applications were about equal to annual N applications when compared on an annual rate equivalent basis. Species composition varied as much among years as among fertilizer treatments. At N rates of 336 kg/ha or less, cool-season grasses increased in about the same proportion as did forbs and shrubs, maintaining a relatively constant composition of the major species groups. On unfertilized plots, herbage yields and water use reached maximum values of about 1,250 kg/ha and 265 mm, respectively, regardless of further increases in available water. Unfertilized plots produced an average of 2.60 kg/ha for each 1 mm of precipitation received as compared with 5.81 kg/ha on fertilized plots. |
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Palavras-Chave: |
Adubacao mineral; Fertilization; Grassland Management; Growing seasons; Plant water relations; Precipitation. |
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Thesagro: |
Pastagem. |
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Thesaurus Nal: |
Fertilizers; Grasses; Nitrogen; Soil water. |
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Categoria do assunto: |
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K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 01893naa a2200265 a 4500
001 1522665
005 2023-12-06
008 1979 bl uuuu u00u1 u #d
100 1 $aWIGHT, J. R.
245 $aRange fertilization$bplant response and water use.
260 $c1979
520 $aAbstract: During the 10-year study, herbage production on an unfertilized, mixed prairie range site in eastern Montana averaged 1,047 kg/ha and ranged from 720 to 1,321 kg/ha. Elimination of nitrogen (N) and phosphorus (P) deficiencies by fertilizing increased herbage yields an average of 114% (ranging from a low of 32% in a "dry" year to a high of 218% in a "wet" year). Nitrogen was the major growth-limiting plant nutrient with measurable responses to P occurring only when N was nonlimiting. Single high-rate applications were about equal to annual N applications when compared on an annual rate equivalent basis. Species composition varied as much among years as among fertilizer treatments. At N rates of 336 kg/ha or less, cool-season grasses increased in about the same proportion as did forbs and shrubs, maintaining a relatively constant composition of the major species groups. On unfertilized plots, herbage yields and water use reached maximum values of about 1,250 kg/ha and 265 mm, respectively, regardless of further increases in available water. Unfertilized plots produced an average of 2.60 kg/ha for each 1 mm of precipitation received as compared with 5.81 kg/ha on fertilized plots.
650 $aFertilizers
650 $aGrasses
650 $aNitrogen
650 $aSoil water
650 $aPastagem
653 $aAdubacao mineral
653 $aFertilization
653 $aGrassland Management
653 $aGrowing seasons
653 $aPlant water relations
653 $aPrecipitation
700 1 $aBLACK, A. L.
773 $tJournal Range Management$gv. 32, n. 5, p. 345-349, 1979.
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