Litter soil organic matter pdf

Effects of four redox treatments on the cumulative co2 production from litter a, soil organic matter som. Integrating plant litter quality, soil organic matter. Integrating plant litter quality, soil organic matter stabilization, and the carbon saturation concept. The importance of soil organic matter home food and. Sawyer andjohan six4 1department of agronomy, iowa state university, ames, ia 50011, usa, 2united states department of agriculture, agricultural research service, rangeland resources research unit, ft. Fungiinitial decomposers of dead material in terrestrial ecosystems. The importance of soil organic matter key to droughtresistant soil and sustained food production fao soils bulletin fao soils bulletin 80 8 0 f a o t h e i m p o r t a n c e o f s o i l o r g a n i c m a t t e r k e t o d r o u g h tr e s i s t a n t s o i l a n d s u s t a i n e d f o o d p r o d u c t i o n 80 i s s n 0 2 5 32 0 5 0. Opinion integrating plant litter quality, soil organic matter stabilization, and the carbon saturation concept michael j. Soil organic matter, the essence of the fertility of soil, which has a great effect on physical, chemical, and biological properties of. Pdf labile, high quality, plant litters are hypothesized to promote soil organic matter som stabilization in mineral soil fractions that are. Trends of litter decomposition and soil organic matter stocks across. Forest soils store a disproportionate amount of carbon compared to other land uses, with 4070% of all soil carbon in the world being stored in forest soils lal, 2005, stocker et al.

Litter decomposition via leaching of dissolved organic matter dom is understudied suggest the wettest of lowland forests may sustain some of the highest rates of litter turnover on earth climate change is likely to slow rates of decomposition, unless litter quality concurrently increased. Transformation of beech forest litter as a factor that. Integrating plant litter quality, soil organic matter stabilization and the carbon saturation concept article pdf available. Disentangling the effects of parent material and litter. Pdf integrating plant litter quality, soil organic. Litter decomposition is a major component of the global carbon c cycle cusack et al. Litter quality and site characteristics interact to affect.

Organic matter and nutrient contents were not significant in both soil layers. Dynamics of organic matter in leaf litter and topsoil within. Relevance of aboveground litter for soil organic matter formation a soil profile perspective. Department of agronomy, iowa state university, ames, ia, 50011 usa. Relevance of aboveground litter for soil organic matter. Variability of aboveground litter inputs alters soil carbon and. Gom swamps had lower rates of litter decomposition in more flooded environments. This study addresses the fate of litter derived carbon c in whole soil profiles with regard to the conceptual cascade model, which proposes that om formation in subsoils is linked to sorptionmicrobial processingremobilization cycles during the downward migration of dissolved organic carbon doc. Implementing agroecological approaches in order to make better use of ecological processes and drivers of the fate of som managing soil microbial communities managing soil macrofauna and mesofauna using deeper rooted systems or plants that allocate more carbon to top and subsoil references. Pdf relevance of aboveground litter for soil organic. Pdf effect of n deposition on decomposition of plant. Soil organic matters mainly derive from plants and microorganisms, including living and dead organisms, as well as its secretion and derivatives. Soil pore water was collected periodically with macrorhizon suction samplers and examined on as, mn, and fe concentrations, ph, eh, and dissolved organic carbon doc.

Management of plant litter resources both above and belowground 4. As a result, effective climate change mitigation and adaptation strategies will be based in part on processes that promote som. Soil organic matter an overview sciencedirect topics. In the mrav, higher levels of percent soil organic matter were related to. Soil microbes are central to many soil processes, but due to the structural complexity of soil organic matter, the accurate quantification of microbial biomass contributions continues to pose a. Pdf nitrogen addition affects chemical compositions of. The soil is the most important sink of terrestrial carbon, storing at least 1500 pg of organic carbon as soil organic matter som batjes, 2014. Litter decomposition influences soil biogeochemistry of plant stands and affects the formation of soil organic matter. Our data emphasizes that rubberbased agroforestry plantations help regulate c and. Pdf differential effects of redox conditions on the. Litterfall, litter decomposition, soil macrofauna, and nutrient content. Maintaining and increasing soil organic matter som is a prominent strategy for mitigating atmospheric co 2 and adapting agriculture to climate change walthall et al.