Cattle-slurry — 15N turnover in a long-term lysimeter trial

Gutser, R.; Dosch, P.

doi:10.1007/978-94-009-1586-2_59

Cited by 6 publications

(1 citation statement)

References 4 publications

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“…Some tracer experiments with 15 N showed that 4% of given N was still immobilised in microbial biomass following 2-year fertilisation [18]. Hence, N accumulations in the soil will increase uncontrolled N losses [19]. But, in spite of this handicap, adequate information on N balance should be obtained for optimal crop yield and quality with reduced N fertiliser use for environmental aspect.…”

Section: Introductionmentioning

confidence: 99%

Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a¹⁵N isotope technique

Karaman

Brohi

2013

Isotopes in Environmental and Health Studies

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The investigation of the residual effect of nitrogen (N) released from tobacco-waste (TW) using isotope techniques will provide valuable data for sustainable organic farming. For this aim, a pot experiment was conducted using the (15)N isotope technique. The experiment was based on a completely randomised design with four replications and was conducted on a calcareous ustochrepts soil. TW at levels of 0, 10, 20, 30 and 40 t ha(-1) and N fertiliser as (NH₄)₂SO₂ at levels of 0, 20, 40, 60 and 80 kg N ha(-1) were used for the Bezostaja-1 wheat variety. Concerning mineral N fertilisation with 20 and 80 kg N ha(-1), additional treatments with (15)N-labelled (NH₄)₂SO₂ (10 at.% exc.) have been applied. Following harvesting wheat plants, the Pioneer 3377 maize variety was used to see the residual effect of TW. After harvesting, dry matter yields were recorded and total N concentrations were determined. (15)N determinations and calculations were also made for (15)N treatments separately. TW had a significant residual effect on the growth of corn plant under the pot condition. Increasing rates of TW significantly increased the dry matter yield of corn plant following wheat from 3.31 t ha(-1) (at control) to 7.89 t ha(-1) (at the TW treatment of 40 t ha(-1)). The (15)N values derived from the (15)N fertiliser decreased with increasing TW application. The average values of N derived from N fertiliser (Ndff) varied from 2.14 to 3.09% at the rates of 20 and 80 kg N ha(-1), respectively. However, N derived from TW (Ndftw) significantly increased from 16.93 to 24.59% (at 20 kg N ha(-1)), and it also increased from 23.06 to 28.15% (at 80 kg N ha(-1)) with increasing TW applications from 20 to 40 t ha(-1), respectively.

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Section: Introductionmentioning

confidence: 99%

Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a¹⁵N isotope technique

Karaman

Brohi

2013

Isotopes in Environmental and Health Studies

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Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope ¹⁵N: A review

Dittert

Goerges

Sattelmacher

1998

J Plant Nutrition & Soil

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In the last decades many aspects of nitrogen turnover have been studied by 15N methods. In this article contemporary 15N tracer as well as natural 15N abundance methods for the study of animal manure turnover are briefly reviewed. The nitrogen dynamics after application of farmyard manure and slurry are elucidated. Here, emphasis was put on results from 15N stable isotope work in the fields of nitrogen immobilization, nitrogenous trace gas emissions, turnover of organic nitrogen fractions, and finally plant uptake. Added nitrogen interactions, which must be considered when interpreting 15N studies, are discussed. Finally promising research fields for the use of stable isotopes are outlined.

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Short‐term and residual availability of nitrogen after long‐term application of organic fertilizers on arable land

Gutser

Ebertseder

Weber

et al. 2005

Z. Pflanzenernähr. Bodenk.

344

251

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Knowledge on short‐term and long‐term availability of nitrogen (N) after application of organic fertilizers (e.g., farmyard manure, slurry, sewage sludge, composts) provides an important basis to optimize fertilizer use with benefits for the farmer and the environment. Nitrogen from many organic fertilizers often shows little effect on crop growth in the year of application, because of the slow‐release characteristics of organically bound N. Furthermore, N immobilization after application can occur, leading to an enrichment of the soil N pool. However, this process finally increases the long‐term efficiency of organic fertilizers. Short‐term N release from organic fertilizers, measured as mineral‐fertilizer equivalents (MFE), varies greatly from 0% (some composts) to nearly 100% (urine). The most important indicators to be used for predicting the short‐term availability of N are total and NH$ _4^+ $‐N contents, C : N ratio (especially of the decomposable organic fraction), and stability of the organic substances. Processing steps before organic fertilizers are applied in the field particularly can influence N availability. Composting reduces mineral‐N content and increases the stability of the organic matter, whereas anaerobic fermentation increases NH$ _4^+ $‐N content as well as the stability of organic matter, but decreases the C : N ratio remarkably, resulting in a product with a high content of directly available N. Nevertheless, long‐term effects of organic fertilizers rather slowly releasing N have to be considered to enable optimization of fertilizer use. After long‐term application of organic fertilizers, the overall N‐use efficiency is adequate to a MFE in the range of 40%–70%.

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Cattle-slurry — 15N turnover in a long-term lysimeter trial

Cited by 6 publications

References 4 publications

Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a¹⁵N isotope technique

Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a¹⁵N isotope technique

Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope ¹⁵N: A review

Short‐term and residual availability of nitrogen after long‐term application of organic fertilizers on arable land

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Cattle-slurry — 15N turnover in a long-term lysimeter trial

Cited by 6 publications

References 4 publications

Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a15N isotope technique

Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a15N isotope technique

Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope 15N: A review

Short‐term and residual availability of nitrogen after long‐term application of organic fertilizers on arable land

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Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a¹⁵N isotope technique

Assessing the subsequent effect of nitrogen released from tobacco-waste on maize crop using a¹⁵N isotope technique

Nitrogen turnover in soil after application of animal manure and slurry as studied by the stable isotope ¹⁵N: A review