Effects of Individual Bunchgrasses on Potential C and N Mineralization of Longleaf Pine Savanna Soils

2004 ◽  
Vol 131 (2) ◽  
pp. 120 ◽  
Author(s):  
J. B. West ◽  
L. A. Donovan
Keyword(s):  
N Mineralization ◽  
Longleaf Pine ◽  
Pine Savanna ◽  
C And N Mineralization ◽  
C And N ◽  
Longleaf Pine Savanna ◽  
Savanna Soils

Carbon and nitrogen mineralization in soil amended with non-tabletized and tabletized poultry manure

2000 ◽  
Vol 80 (2) ◽  
pp. 271-276 ◽  
Author(s):  
T. Paré ◽  
H. Dinel ◽  
M. Schnitzer
Keyword(s):  
Nitrogen Mineralization ◽  
N Mineralization ◽  
Organic Fertilizer ◽  
Carbon Mineralization ◽  
Poultry Manure ◽  
Net N Mineralization ◽  
N Accumulation ◽  
Suitable Alternative ◽  
C And N Mineralization ◽  
C And N

The recycling of poultry (Gallus gallus domesticus) manure (PM) needs to be done in a manner that will not only improve soil physical, chemical and biological properties but also minimize environmental risks. Untreated PM is more difficult to handle and more expensive to apply than granular fertilizers; the application of PM in the form of tablets may be a suitable alternative. It is necessary to determine whether C and N mineralization in tabletized PM (T-PM) differs from non-tabletized PM (NT-PM). Net C and N mineralization from a Brandon loam soil (Typic Endoaquoll) amended with NT-PM and T-PM, were measured in an incubation study at 25 °C. After 60 d of incubation, about 62 and 77% of total PM carbon was mineralized in NT-PM and T-PM amended soils, respectively. Carbon mineralization was not stimulated by the addition of PM tablets containing NPK to soil, while in soils mixed with NT-PM + NPK, soil respiration was reduced. Net N mineralization was similar in soils amended with T-PM and NT-PM, although changes in ammonium (NH4+–N) concentrations during incubation differed. Generally more NH4+–N accumulated in soil amended with T-PM and T-PM + NPK than with NT-PM and NT-PM + NPK The concentrations of nitrate (NO3−–N) did not differ in soils amended with T-PM and NT-PM, indicating a reduction in nitrification and NH4+–N accumulation in soils amended with PM tablets. Key words: Poultry manure, tablets, carbon mineralization, nitrogen mineralization, organic fertilizer

scholarly journals Enzymatic activity and mineralization of carbon and nitrogen in soil cultivated with coffee and green manures

2010 ◽  
Vol 34 (5) ◽  
pp. 1573-1583 ◽  
Author(s):  
Elcio Liborio Balota ◽  
Julio César Dias Chaves
Keyword(s):  
Enzyme Activity ◽  
Cover Crops ◽  
Leucaena Leucocephala ◽  
N Mineralization ◽  
Urease Activity ◽  
Tree Canopy ◽  
C And N Mineralization ◽  
Legume Cover Crops ◽  
C And N ◽  
Coffee Plants

There are great concerns about degradation of agricultural soils. It has been suggested that cultivating different plant species intercropped with coffee plants can increase microbial diversity and enhance soil sustainability. The objective of this study was to evaluate enzyme activity (urease, arylsulfatase and phosphatase) and alterations in C and N mineralization rates as related to different legume cover crops planted between rows of coffee plants. Soil samples were collected in a field experiment conducted for 10 years in a sandy soil in the North of Paraná State, Brazil. Samples were collected from the 0-10 cm layer, both from under the tree canopy and in-between rows in the following treatments: control, Leucaena leucocephala, Crotalaria spectabilis, Crotalaria breviflora, Mucuna pruriens, Mucuna deeringiana, Arachis hypogaea and Vigna unguiculata. The soil was sampled in four stages of legume cover crops: pre-planting (September), after planting (November), flowering stage (February) and after plant residue incorporation (April), from 1997 to 1999. The green manure species influenced soil enzyme activity (urease, arylsulfatase and phosphatase) and C and N mineralization rates, both under the tree canopy and in-between rows. Cultivation of Leucaena leucocephala increased acid phosphatase and arilsulfatase activity and C and N mineralization both under the tree canopy and in-between rows. Intercropped L. leucocephala increased urease activity under the tree canopy while C. breviflora increased urease activity in-between rows.

Simulating the effects of N availability, straw particle size and location in soil on C and N mineralization

2007 ◽  
Vol 301 (1-2) ◽  
pp. 289-301 ◽  
Author(s):  
S. J. Giacomini ◽  
S. Recous ◽  
B. Mary ◽  
C. Aita
Keyword(s):  
Particle Size ◽  
N Mineralization ◽  
N Availability ◽  
C And N Mineralization ◽  
C And N

Long-term tillage and crop rotation effects on microbial biomass and C and N mineralization in a Brazilian Oxisol

2004 ◽  
Vol 77 (2) ◽  
pp. 137-145 ◽  
Author(s):  
Elcio L. Balota ◽  
Arnaldo Colozzi Filho ◽  
Diva S. Andrade ◽  
Richard P. Dick
Keyword(s):  
Microbial Biomass ◽  
Crop Rotation ◽  
N Mineralization ◽  
C And N Mineralization ◽  
C And N
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