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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/35345
Título: 
Root growth and cotton nutrition as affected by liming and soil compaction
Autor(es): 
Instituição: 
Universidade Estadual Paulista (UNESP)
ISSN: 
0010-3624
Resumo: 
Soil columns were produced by filling PVC tubes with a Dark Red Latosol (Acrortox, 22% of clay). A compacted layer was established at the depth of 15 cm in the columns. In the compacted layer, soil was packed to 1.13, 1.32, 1.48, and 1.82 Mg kg(-1), resulting in cone resistances of 0.18, 0.43, 1.20, and 2.50 MPa. Cotton was cropped for 30 days. Lime was applied to raise base saturation to 40, 52, and 67%. The highest base saturation caused a decrease in phosphorus (P) and zinc (Zn) concentrations in the plants. A decrease in root dry matter, length and surface area was also observed. This could be a consequence of lime induced Zn deficiency. Root growth was decreased in the compacted layer, and complete inhibition was noticed at 2.50 MPa. Once the roots got through the compacted layer, there was a growth recovery in the bottom layer of the pots. The increase in base saturation up 52% was effective in preventing a decrease in cotton root length at soil resistances to 1.20 MPa. Where the roots were shorter, there was an increase in nutrient uptake per unit of root surface area, which kept the plants well nourished, except for P.
Data de publicação: 
1-Jan-1998
Citação: 
Communications In Soil Science and Plant Analysis. Philadelphia: Taylor & Francis Inc., v. 29, n. 1-2, p. 169-177, 1998.
Duração: 
169-177
Publicador: 
Taylor & Francis Inc
Fonte: 
http://dx.doi.org/10.1080/00103629809369936
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/35345
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