preparo profundo - jairo mazza / esalq-usp
TRANSCRIPT
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PREPARO PROFUNDO CANTEIRIZADO
Prof. Dr. Jairo Antonio Mazza
ESALQ / USP
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PREPARO DO SOLO
Como é o solo?Como está o solo?
Como deve ficar o solo?
Com restrições em grau reduzido ou ausentes!
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RESTRIÇÕES
Físicas – Compactação
Químicas – V%, pH, nutrientes
Biológicas Microorganismos X M.O
Pragas
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OPÇÕES DE PREPARO EM FUNÇÃO DAS RESTRIÇÕES
1 2 3 4 5
Plantio Direto Subsolagem Destruidor de Soqueira Aração Preparo Vertical
sem restrições restrição física (B) + subsolagem (F) + aração Q (F) Q (F / B) F / Q / B
F – restrição física Q – restrição química B – restrição relacionada a pragas
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PLANEJAMENTO POR BLOCO DE COLHEITA
ÉPOCA DA COLHEITA
ÉPOCA DO PLANTIO
DEFINIÇÃO DA ÉPOCA DE PREPARO
(opção do preparo e riscos de erosão)
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COMO ADOTAR OPÇÕES DE MAIOR MOVIMENTAÇÃO DO SOLO REDUZINDO-SE OS RISCOS DE EROSÃO?
1. Água externa, posicionamento e forma dos carreadores e tipo de solo (resistência dos agregados, capacidade de absorção de água e condutividade hidráulica)
2. Planejamento Conhecimento dos solos Opções de sistematização Conhecimento da cultura Definição de época / solo / opção de preparo Cobertura vegetal de rápido crescimento
3. Sequência e momento das operações envolvidas na opção de preparo
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Épocas de colheita considerando-se a CAD, os riscos de compactação, a adequação da sistematização e o potencial de produção das unidades de manejo de solo
UNIDADE DE MANEJO
MESES DO ANO
Jan / Fev Mar / Abr Mai / Jun Jul / Ago Set / Out Nov / Dez
PVe A ar/md X X X X
PVd A ar/md X X X X X
PVe ar/md X X X X
PVd ar/md X X X
LVPe md X X X
LVPd md X X X
NQPm X X
X = adequada X = pouco adequada
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Épocas de plantio considerando-se os riscos de erosão e o potencial de brotação e de produção das unidades de manejo de solos
UNIDADE DE MANEJO
MESES DO ANO
CANA DE ANO-E-MEIO CANA DE INVERNO CANA DE ANO
Jan / Fev Mar / Abr Mai / Jun Jul / Ago Set / Out Nov / Dez
PVe A ar/md X X X X X X
PVd A ar/md X X X X X X
PVe ar/md X X X X
PVd ar/md X X X X
LVPe md X X X X X
LVPd md X X X X
NQPm X X X
X = adequada X = pouco adequada X = falta de umidade
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Épocas de preparo considerando-se os riscos de assoreamento e erosão, a friabilidade, o tempo necessário para correção e o potencial de brotação em plantio
UNIDADE DE MANEJO
MESES DO ANO
Jan / Fev Mar / Abr Mai / Jun Jul / Ago Set / Out Nov / Dez
PVe A ar/md X X X X X X
PVd A ar/md X X X X X X
PVe ar/md X X X X
PVd ar/md X X X X
LVPe md X X X X X X
LVPd md X X X X X X
NQPm X X X X X X
X = menor risco X = falta de umidade X = maior risco
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ASPECTOS QUÍMICOS DO SOLO PÓS-ARAÇÃO(Angélica Agroenergia – MS)
P(res) = 7 mg/dm3
V = 31%Ca = 11 mmolc/dm3
Mg = 3 mmolc/dm3
P(res) = 46 mg/dm3
V = 66%Ca = 22 mmolc/dm3
Mg = 12 mmolc/dm3
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Dalplan
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Dalplan
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Dalplan
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Dalplan
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Dalplan
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Dalplan
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Dalplan
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Dalplan
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Dalplan
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Dalplan
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