Investigations of Carbon and Nitrogen Dynamics In Different Long-Term Experiments by Means of Biological Soil Properties

Weigel, A.; Klimanek, Eva-Maria; Körschens, Martin; Merčlk, S.

doi:10.1201/9780203739273-23

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…15%) shows the importance of the fine soil particles for the increased C stabilization, as emphasized by Hassink (1997), Weigel et al (1997) and Albert and Lippold (2002). Our finding is also in line with the conceptional model proposed by von Lützow et al (2007), which considers organo-mineral associations as an important pool for C stabilization and also with the Rothamsted Carbon Model, which calculates a decreasing fraction of CO 2 produced to C sequestered in the pools microbial biomass and humified organic matter with increasing clay contents (Coleman and Jenkinson, 1999).…”

Section: Soil Organic Matter and Total Nitrogenmentioning

confidence: 80%

“…Only some selected improvements of soil quality induced by OM increase will be mentioned. OM can provide organic substances like vitamins and auxins to stimulate plant growth and microbial activity (Weigel et al, 1997;Brady and Weil, 1997). An increase in soil C stocks results in a higher storage of nutrients as well as higher water holding capacity and pH buffering capacity.…”

Section: Sequestration In Agricultural Soilsmentioning

confidence: 99%

“…Several studies reported that fine-textured soils have a higher denitrification potential (Bouwman, 2002;Freibauer et al, 2003) and that the fine soil particles are more important for C stabilization (Hassink, 1997;Weigel et al, 1997). Rochette (2008) summarized data from different tillage experiments and came to the conclusion that well aerated soils react less to increased organic C stocks by minimum tillage than fine-textured soils.…”

Section: Ch 4 Fluxesmentioning

confidence: 99%

See 2 more Smart Citations

Effekte unterschiedlicher Langzeitdüngerstrategien auf Humusgehalt und N2O Emissionen landwirtschaftlich genutzter Böden

Jäger¹

View full text Add to dashboard Cite

The cumulative dissertation is based on three manuscripts to which the PhD candidate predominantly contributed as the first author and one article to which she contributed as co-author. The studies are or will be published in international refereed journals: Jäger, N., Duffner, A., Ludwig, B., Flessa, H.: Long-term and short-term effects of the application of mineral and organic fertilizer on N 2 O and CO 2 emissions from a sandy soila laboratory incubation Jäger, N., Stange, C.F., Ludwig, B., Flessa, H.: Emission rates of N 2 O and CO 2 from soils with different organic matter content from three long-term fertilization experiments -a laboratory study Jäger, N., Dechow, R., Oltmanns, M., Raupp, J., Flessa, H.: Effects of different long-term fertilization treatments on soil organic matter stocks, N 2 O emissions and CH 4 uptake of a sandy soil Ludwig, B., Jäger, N., Priesack E., Flessa, H.: Application of the DNDC model to predict N 2 O emissions from sandy arable soils with differing fertilization in a long-term experiment, Journal of Plant Nutrition and Soil Science, accepted This thesis starts with a general introduction that imparts knowledge about the climaterelevant trace gases CO 2 and N 2 O. The processes of production and consumption in soils are explained and the reasons, how carbon sequestration influences the climate change and agriculture, are given. Then, the supposed mechanism of carbon sequestration leading to

show abstract

Section: Soil Organic Matter and Total Nitrogenmentioning

confidence: 80%

Section: Sequestration In Agricultural Soilsmentioning

confidence: 99%

Section: Ch 4 Fluxesmentioning

confidence: 99%

See 1 more Smart Citation

Effekte unterschiedlicher Langzeitdüngerstrategien auf Humusgehalt und N2O Emissionen landwirtschaftlich genutzter Böden

Jäger¹

View full text Add to dashboard Cite

show abstract

Effects of fertilizer type and rate on labile soil fractions of a sandy Cambisol—long‐term and short‐term dynamics

Heitkamp

Raupp²,

Ludwig

2011

Z. Pflanzenernähr. Bodenk.

View full text Add to dashboard Cite

The application of density fractionation is an established technique, but studies on short‐term dynamics of labile soil fractions are scarce. Objectives were (1) to quantify the long‐term and short‐term dynamics of soil C and N in light fraction (LFOC, LFON, ρ ≤ 2.0 g cm–3) and microbial biomass C (Cmic) in a sandy Cambisol as affected by 28 y of different fertilization and (2) to determine the incorporation of C4‐C into these labile fractions during one growing season of amaranth. The treatments were: straw incorporation plus application of mineral fertilizer (MSI) and application of farmyard manure (FYM) each at high (MSIH, FYMH, 140–150 kg N ha–1 y–1) and low (MSIL, FYML, 50–60 kg N ha–1 y–1) rates at four field replicates. For all three sampling dates in 2008 (March, May, and September), stocks of LFOC, LFON and Cmic decreased in the order FYMH > FYML > MSIH, MSIL. However, statistical significance varied markedly among the sampling dates, e.g., with LFOC being significantly different (p ≤ 0.05) in the order given above (sampling date in March), significantly different depending on the fertilizer type (May), or nonsignificant (September). The high proportion of LFOC on the stocks of soil organic C (45% to 55%) indicated the low capacity of soil‐organic‐matter stabilization on mineral surfaces in the sandy Cambisol. The incorporation of C4‐C in the LFOC during one growing season of amaranth was small in all four treatments with C4‐LFOC ranging from 2.1% to 3.0% of total LFOC in March 2009, and apparent turnover times of C3‐derived LFOC ranged from 21 to 32 y for the sandy soils studied. Overall, our study indicates that stocks of LFOC and LFON in a sandy arable soil are temporarily too variable to obtain robust significant treatment effects of fertilizer type and rate at common agricultural practices within a season, despite the use of bulked six individual cores per plot, a common number of field replicates of four, and a length of treatments (28 y) in the order of the turnover time (21–32 y) of C3‐derived LFOC.

show abstract

Soil Organic C Development in Cereal and Ley Systems. Data from 20 Years Old Swedish Field Experiments

Mattsson

2002

Archives of Agronomy and Soil Science

View full text Add to dashboard Cite

In four Swedish long-term field experiments in cereals and in four with mixed ley production the top soil organic C changes with time were investigated at different N levels. In the cereals treatments with all straw removed and all straw chopped and ploughed into the soil were compared. The experiments were started 20 years or more ago at 4 contrasting sites from south to north and they are still running. In the cereal system the C content decreased from 2.3 to 1.9% on average over the sites. The decline was the biggest where the initial content was the highest. Straw returned increased the C content with 0.1 percentage unit compared with straw removed. N also increased the C content in the cereal system but not in the ley system. The change with time was also insignificant in the ley part.Estimated rate constants for C decomposition varied from 0.1 to 1.66% yr -1 in cereals. It decreased usually with increasing N level. When straw was returned at the high N level the rate constant also decreased. The rate constants corresponded to C break down of 610-740 kg ha -1 at the northernmost site and 250-270 kg ha -1 at the southernmost. With the assumed humification factor of 15% the gross supply of C was not high enough to maintain present C content at the northern site but at the southern site it was. In the ley systems steady state levels seemed almost to be established.

show abstract

Investigations of Carbon and Nitrogen Dynamics In Different Long-Term Experiments by Means of Biological Soil Properties

Cited by 4 publications

References 1 publication

Effekte unterschiedlicher Langzeitdüngerstrategien auf Humusgehalt und N2O Emissionen landwirtschaftlich genutzter Böden

Effekte unterschiedlicher Langzeitdüngerstrategien auf Humusgehalt und N2O Emissionen landwirtschaftlich genutzter Böden

Effects of fertilizer type and rate on labile soil fractions of a sandy Cambisol—long‐term and short‐term dynamics

Soil Organic C Development in Cereal and Ley Systems. Data from 20 Years Old Swedish Field Experiments

Contact Info

Product

Resources

About