Organic C and N mineralization as affected by dissolved organic matter in paddy soils of subtropical China

Geoderma ◽  
2010 ◽  
Vol 157 (3-4) ◽  
pp. 206-213 ◽  
Author(s):  
Z.P. Li ◽  
C.W. Han ◽  
F.X. Han
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
N Mineralization ◽  
Paddy Soils ◽  
Subtropical China ◽  
Organic C ◽  
C And N Mineralization ◽  
C And N

scholarly journals Impact of Poultry Litter Cake, Cleanout, and Bedding following Chemical Amendments on Soil C and N Mineralization

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Dexter B. Watts ◽  
Katy E. Smith ◽  
H. A. Torbert
Keyword(s):  
N Mineralization ◽  
Crop Production ◽  
Sandy Loam ◽  
Poultry Litter ◽  
N Availability ◽  
C Mineralization ◽  
Organic C ◽  
Soil C ◽  
C And N Mineralization ◽  
C And N

Poultry litter is a great alternative N source for crop production. However, recent poultry litter management changes, and increased chemical amendment use may impact its N availability. Thus, research was initiated to evaluate the effect that broiler cake and total cleanout litter amended with chemical additives have on C and N mineralization. A 35-day incubation study was carried out on a Hartsells fine sandy loam (fine-loamy, siliceous, subactive, thermic Typic Hapludults) soil common to the USA Appalachian Plateau region. Three poultry litter components (broiler cake, total cleanout, and bedding material) from a broiler house were evaluated and compared to a soil control. Chemical amendments lime (CaCO3), gypsum (CaSO4), aluminum sulfate (AlSO4), and ferrous sulfate (FeSO4) were added to the poultry litter components to determine their impact on C and N mineralization. Litter component additions increased soil C mineralization in the order of broiler cake > total cleanout > bedding > soil control. Although a greater concentration of organic C was observed in the bedding, broiler cake mineralized the most C, which can be attributed to differences in the C : N ratio between treatments. Chemical amendment in addition to the manured soil also impacted C mineralization, with AlSO4generally decreasing mineralization. Nitrogen mineralization was also significantly affected by poultry litter component applications. Broiler cake addition increased N availability followed by total cleanout compared to soil control, while the bedding resulted in net N immobilization. Chemical amendments impacted N mineralization primarily in the broiler cake amended soil where all chemical amendments decreased mineralization compared to the no chemical amendment treatment. This short-term study (35-day incubation) indicates that N availability to crops may be different depending on the poultry litter component used for fertilization and chemical amendment use which could decrease N mineralization.

Organic matter characteristics of food processing industry wastewaters affecting their C and N mineralization in soil incubation

2006 ◽  
Vol 97 (11) ◽  
pp. 1284-1295 ◽  
Author(s):  
Virginie Parnaudeau ◽  
Bernard Nicolardot ◽  
Philippe Robert ◽  
Gonzague Alavoine ◽  
Jérôme Pagès ◽  
...  
Keyword(s):  
Organic Matter ◽  
Food Processing ◽  
N Mineralization ◽  
Soil Incubation ◽  
Food Processing Industry ◽  
Processing Industry ◽  
C And N Mineralization ◽  
C And N

Nitrogen and carbon mineralization in soil amended with municipal solid waste compost

1999 ◽  
Vol 79 (4) ◽  
pp. 535-542 ◽  
Author(s):  
M. Mamo ◽  
J. A. E. Molina ◽  
C. J. Rosen ◽  
T. R. Halbach
Keyword(s):  
Organic Matter ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
N Mineralization ◽  
Soil N ◽  
Total Soil ◽  
C And N Mineralization ◽  
Msw Compost ◽  
C And N ◽  
Total Soil N

Municipal solid waste (MSW) compost contains large amounts of organic matter that can be beneficial to soil. The objectives of this study were to measure N mineralization and acid hydrolyzable N in soil amended with MSW compost and correlate corn (Zea mays L.) grain yield with acid hydrolyzable N. The soil, an Orthic Black Chernozem (Entic Hapludoll) cropped to corn, was amended with composts at either 90 dry Mg ha−1 yr−1 from 1993 to 1995, or at 270 dry Mg ha−1 in one application in 1993. Soil samples were collected in the fall of 1994 and 1995 to measure C and N mineralization and acid hydrolyzable N. Potentially mineralizable N was estimated with the NCSOIL model after using C and N mineralization observed in the laboratory to calibrate the model. Net N immobilization occurred in compost-amended soils collected in 1994 with less than 0.2% of the total soil N mineralized in the compost treatments. In 1995, there was net mineralization in compost treatments but less than 5% of total soil N mineralized in 120 d. The addition of compost increased the acid hydrolyzable N of soil with 43–63% of the total soil N being acid hydrolyzable. Acid hydrolyzable soil N did not correlate to No but weakly correlated with corn grain yield. The MSW compost source was more important than the timing of application in inducing differences in soil biochemical properties. Keys words: Municipal solid waste compost, organic matter, potentially mineralizable nitrogen, acid hydrolysis

SOIL ORGANIC MATTER CHARACTERISTICS AFTER LONG-TERM CROPPING TO VARIOUS SPRING WHEAT ROTATIONS

1987 ◽  
Vol 67 (4) ◽  
pp. 845-856 ◽  
Author(s):  
H. H. JANZEN
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Fertility ◽  
Crop Rotation ◽  
Spring Wheat ◽  
N Mineralization ◽  
Soil Layer ◽  
Organic C ◽  
C And N

Soil from a long-term crop rotation study conducted at Lethbridge, Alberta was analyzed to determine the influence of various spring wheat rotations with and without perennial forages on total and mineralizable soil organic matter contents. Crop rotations considered included: continuous wheat (W), fallow-wheat (FW), fallow-wheat-wheat (FWW), and fallow-wheat-wheat-forage-forage-forage (FWWAAA) in which the forage was a mixture of alfalfa and crested wheat grass. The organic C and N contents of soil after 33 yr of cropping were highest in treatments W and FWWAAA, and decreased with increasing frequency of fallow in the rotation. The inclusion of the perennial forage in the rotation did not increase organic C and N levels above those observed in the continuous wheat treatment (W). Differences in levels of mineralizable organic matter among treatments, as measured in laboratory incubations, were much greater than differences in total organic matter content among treatments. In the surface soil layer (0–15 cm), N mineralization was significantly higher in treatment W than in treatments FWW and FWWAAA, and was more than twice that observed in treatment FW. In the subsurface soil layer (15–30 cm), N mineralization was greatest in treatment FWWAAA when sampled just after the plowdown of forage. Effects of crop rotation on C mineralization were similar to those observed for N. Levels of mineralized organic matter were closely related to levels of "light fraction" material (specific gravity < 1.59 g cm−3), which is believed to consist primarily of incompletely decomposed organic matter of plant origin. Differences in amounts of mineralizable organic matter among treatments were attributed to varying frequencies and patterns of crop residue additions. The pronounced effects of crop rotation on the distribution of organic matter among labile and humified organic matter will have a strong impact on soil fertility and may need to be taken into consideration in the development of fertilizer recommendations. It was concluded that inclusion of perennial forages in spring wheat rotations for the purpose of enhancing soil fertility and organic matter levels was not justified under semiarid conditions. Key words: Carbon, nitrogen, mineralization

scholarly journals Interactive effects of belowground organic matter input, increased precipitation and clipping on soil carbon and nitrogen mineralization in a temperate steppe

2013 ◽  
Vol 10 (6) ◽  
pp. 9493-9521
Author(s):  
L. N. Ma ◽  
C. Y. Guo ◽  
X. P. Xin ◽  
S. Yuan ◽  
R. Z. Wang
Keyword(s):  
Organic Matter ◽  
N Mineralization ◽  
Interactive Effects ◽  
Mineralization Rate ◽  
Temperate Steppe ◽  
Soil Microbial Community Structure ◽  
Soil C ◽  
C And N Mineralization ◽  
Soil C And N ◽  
C And N

Abstract. Soil organic matter (SOM) inputs, increased precipitation and clipping (reducing belowground photosynthates allocation) are predicted to affect soil C and N cycling in temperate grassland ecosystems. However, the interactive effects between SOM inputs (or increased precipitation) and clipping on soil C and N mineralization in temperate steppes are still poorly understood. A field manipulation experiment was conducted to quantify the effects of SOM inputs, increased precipitation, clipping and their interactions on soil C and N mineralization in a temperate steppe of northeastern China from 2010 to 2011. The results showed that SOM inputs significantly increased soil C mineralization rate (CMR) and net N mineralization rate (NMR). Increased precipitation-induced enhancement of soil CMR essentially ceased after the first year, stimulation of soil NMR and NNR continued into the second year. However, clipping only marginally decreased soil CMR and NMR during the two years. There were significant synergistic interactions between SOM inputs (or increased precipitation) and clipping on soil CMR and NMR, as SOM inputs (or increased precipitation) showed greater effects on soil CMR and NMR under clipped plots than under unclipped plots, which could be explained by the relative shifts in soil microbial community structure because of bacterial biomass increases, and by the relative decreases in arbuscular mycorrhizal fungi biomass due to the reduction of belowground photosynthates allocation. These results highlight the importance of plants in mediating the responses of soil C and N mineralization to potentially increased SOM and precipitation by controlling belowground photosynthates allocation in the temperate steppe. Thus, the findings have important implications for improving prediction of C and N sequestration potential and its feedbacks to climate change in temperate steppe ecosystems.

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