A wet oxidation procedure suitable for total nitrogen and phosphorus in soil

Rowland, A. P.; Grimshaw, H. M.

doi:10.1080/00103628509367628

Cited by 44 publications

(16 citation statements)

References 6 publications

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“…Total soil C and total N concentrations were measured by dry combustion (Leco CNS-1000, Leco Corp., St-Joseph, MI). Total soil P content was determined by wet oxidation as described by Rowland and Grimshaw (1985).…”

Section: Methodsmentioning

confidence: 99%

Differential retention of carbon, nitrogen and phosphorus in grassland soil profiles with long-term manure application

Angers

Chantigny

MacDonald

et al. 2009

Nutr Cycl Agroecosyst

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Liquid hog manure (LHM) is a valuable source of nutrients for farm production. Long-term experimental plots that had received LHM applications of 0, 50, and 100 m 3 ha -1 annually for 20 years were analyzed for total soil C, N and P storage. Applications increased total soil N and P by 1,200 kg N ha -1 and 850 kg P ha -1 at 100 m -3 LHM year -1 , compared to the control treatment. However, C storage did not increase with LHM rates and was lower in the 50 m 3 ha -1 LHM treatment (86 Mg C ha -1 ) than in the 0 or 100 m 3 ha -1 treatments (100 Mg C ha -1 ). In addition to the limited quantities and high decomposability of the C supplied by LHM, it is hypothesized that LHM stimulated the mineralization of both native soil C and fresh root-derived material. This priming effect was particularly apparent in deeper soil horizons where the decomposability of native C may be limited by the supply of fresh C. This study indicates that while LHM can be a significant source of crop nutrients, it has limited capacity for maintaining or increasing soil C.

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Section: Methodsmentioning

confidence: 99%

Differential retention of carbon, nitrogen and phosphorus in grassland soil profiles with long-term manure application

Angers

Chantigny

MacDonald

et al. 2009

Nutr Cycl Agroecosyst

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“…Water content for the samples was determined by preand post-weighing of well-mixed subsamples dried at 60°C for 24 h. Organic content was determined as losson-ignition (LOI) by ashing at 550°C for 3 h. Total phosphorus concentration was determined using the molybdenum blue reaction on a SEAL AQ2 auto analyser (Seal Analytical Ltd., Fareham, Hampshire, U.K.) following a 2-h hot sulphuric acid-hydrogen peroxide digestion (Rowland & Grimshaw, 1985). Particle size analysis was carried out on a Malvern Mastersizer 2000 (Malvern Instruments Limited, Malvern, Worcestershire, U.K.) after heating for 3 h in hydrogen peroxide to remove organic material and passing through a 2-mm sieve.…”

Section: Field and Laboratory Methodsmentioning

confidence: 99%

“…Organic content was determined as loss-on-ignition (LOI) then by ashing at 550˚C for three hours. Total phosphorus concentration was determined using the molybdenum blue reaction on a SEAL AQ2 auto analyser (Seal Analytical Ltd., Fareham, Hampshire, UK) following a two hour hot sulphuric acid-hydrogen peroxide digestion (Rowland & Grimshaw, 1985).…”

Section: Field and Laboratory Methodsmentioning

confidence: 99%

Contribution of sediment focussing to heterogeneity of organic carbon and phosphorus burial in small lakes

et al. 2011

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Contribution of sediment focussing to heterogeneity of organic carbon and phosphorus burial in small lakes. Freshwater Biology, 57 (2). 290-304.10.1111/j. 1365-2427.2011.02616.x Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. 2. We elucidated the heterogeneity of surface sediment distribution in a small lake, Esthwaite Water (UK). We considered multiple focusing mechanisms (downslope gravitational transport, waves, and wind-driven currents) and their effect on multiple sediment variables (water content, organic content, total phosphorus and benthic diatom taxon richness). In particular, we investigated the implications of different focusing processes for calculations of burial rates of organic carbon and total phosphorus. We used a new, high-resolution bathymetric survey of the lake in our calculations and compared the results to those from an earlier low-resolution bathymetric survey.4. Wave-driven focusing and downslope gravitational transport were not significant in Esthwaite Water. However, calculated wind-induced current speeds were sufficient to mobilise small particles at all depths of the lake and therefore could potentially be an important resuspension process in small lakes.5. We calculated that approximately half of the phosphorus entering the lake is retained in the sediments. This has important implications for the ability of the lake to recover from eutrophication because of the prolonged internal phosphorus loading capability.6. Differences in calculated burial rates due to sediment heterogeneity were much larger than those due to the difference in bathymetric resolution. Ignoring sediment heterogeneity when calculating flux-to-lake bed rates for organic carbon and total 3 phosphorus can lead to large inaccuracies, with implications for burial rate and budget studies.

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“…Both total N and total P were calculated based on the oven-dry (105°C [221°F]) weight of the soil. Soil total N was determined by micro-Kjeldahl digestion, and soil total P was determined by the wet oxidation procedure described by Rowland and Grimshaw (1985).…”

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confidence: 99%

Effect of straw incorporation on soil moisture, evapotranspiration, and rainfall-use efficiency of maize under dryland farming

Wang¹,

Jia²,

Liang³

2014

Journal of Soil and Water Conservation

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Field experiments were conducted from 2008 to 2010 in the Weibei Highlands of China to study the effects of straw incorporation on soil moisture, evapotranspiration (ET), and rainfall-use efficiency (RUE) of maize (Zea mays L.) under semiarid conditions in dark loessial soil. The straw application rates were at low straw ([LS] 4.5 t ha -1 ), medium straw ([MS] 9 t ha -1 ), and high straw ([HS] 13.5 t ha -1 ) rates combined with fixed levels of chemical fertilizers compared with only chemical fertilizers. Straw incorporation significantly increased surface soil moisture at the grain filling stage of maize and significantly improved RUE in the whole growth period of maize. Evapotransipiration at the ten leaf collar to tasseling and the grain filling to maturity stages of maize were significantly increased by straw incorporation. However, ET at the tasseling to grain filling stage of maize was significantly reduced by straw incorporation. Medium straw and HS treatments significantly improved surface soil moisture at the tasseling stage of maize and RUE at the five leaf collar to maturity stage of maize. Increasing straw application rates significantly reduced ET at the grain filling to maturity stage of maize. With increasing experimental years, LS treatment significantly improved surface soil moisture at the five leaf collar to tasseling stage of maize and RUE at the five and ten leaf collar stage of maize, MS treatment significantly increased surface soil moisture at the five and ten leaf collar stages of maize, and HS treatment significantly reduced ET at the sowing to five leaf collar stage of maize. We conclude that a reasonable combination application of straw and chemical fertilizers could make full use of surface soil moisture, inhibit soil evaporation, reduce the ineffective evaporation of crop, and increase RUE at a different growth period of maize and grain yield. In this experiment, the optimum straw application rate for improving RUE and grain yield was MS treatment.

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A wet oxidation procedure suitable for total nitrogen and phosphorus in soil

Cited by 44 publications

References 6 publications

Differential retention of carbon, nitrogen and phosphorus in grassland soil profiles with long-term manure application

Differential retention of carbon, nitrogen and phosphorus in grassland soil profiles with long-term manure application

Contribution of sediment focussing to heterogeneity of organic carbon and phosphorus burial in small lakes

Effect of straw incorporation on soil moisture, evapotranspiration, and rainfall-use efficiency of maize under dryland farming

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