Sistemas agroflorestais e seus efeitos sobre os atributos químicos em Argissolo Vermelho-Amarelo do Cerrado piauiense
作者： Bruna de F Iwata , Luiz FC Leite , Ademir SF Araújo , Luis APL Nunes , Christoph Gehring
DOI: 10.1590/S1415-43662012000700005
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摘要: This study aimed to quantify the effects of agroforestry systems (AFS), with different periods adoption, and slash burn agriculture (SB) on chemical attributes an Ultisol in 'Cerrado' Piaui State, Brazil. In two distinct climatic seasons (dry rainy) four were studied: AFS six (AFS6) thirteen years (AFS13) area under SB a native forest (NF), as reference. AFS, all depths, higher reduction Al3+ H+ + contents observed well increase pH value nutrients (N, P, Ca, Mg K) organic carbon soil. soil SB, only superficial layers, ash deposited caused nutrients, except for which was depths. There significant seasonal effect reducing rainy season. Agroforestry promoted nutrient can be considered useful improve quality areas
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