NDLI: Carbon, nitrogen, organic phosphorus, microbial biomass and N mineralization in soils under cacao agroforestry systems in Bahia, Brazil

Content Provider	Springer Nature Link
Author	Zaia, F. C. Gama Rodrigues, A. C. Gama Rodrigues, E. F. Moço, M. K. S. Fontes, A. G. Machado, R. C. R. Baligar, V. C.
Copyright Year	2012
Abstract	Large amounts of plant litter deposited in cacao agroforestry systems play a key role in nutrient cycling. Organic matter, nitrogen and phosphorus cycling and microbial biomass were investigated in cacao agroforestry systems on Latosols and Cambisols in Bahia, Brazil. The objective of this study was to characterize the microbial C and N, mineralizable N and organic P in two soil orders under three types of cacao agroforestry systems and an adjacent natural forest in Bahia, Brazil and also to evaluate the relationship between P fractions, microbial biomass and mineralized N with other soil attributes. Overall, the average stocks of organic C, total N and total organic P across all systems for 0–50 cm soil depth were 89,072, 8,838 and 790 kg ha−1, respectively. At this soil depth the average stock of labile organic P was 55.5 kg ha−1. For 0–10 cm soil depth, there were large amounts of microbial biomass C (mean of 286 kg ha−1), microbial biomass N (mean of 168 kg ha−1) and mineralizable N (mean of 79 kg ha−1). Organic P (total and labile) was negatively related to organic C, reflecting that the dynamics of organic P in these cacao agroforestry systems are not directly associated with organic C dynamics in soils, in contrast to the dynamics of N. Furthermore, the amounts of soil microbial biomass, mineralizable N, and organic P could be relevant for cacao nutrition, considering the low amount of N and P exported in cacao seeds.
Starting Page	197
Ending Page	212
Page Count	16
File Format	PDF
ISSN	01674366
Journal	Agroforestry Systems
Volume Number	86
Issue Number	2
e-ISSN	15729680
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-07-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cacao cabruca Erythrina spp. Bowman extraction method Labile P fraction Forestry Agriculture
Content Type	Text
Resource Type	Article
Subject	Forestry Agronomy and Crop Science

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