+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Acid deposition: effects of sulphuric acid at pH 3 on chemical and biochemical properties of bracken litter

, : Acid deposition: effects of sulphuric acid at pH 3 on chemical and biochemical properties of bracken litter. Soil Biology and Biochemistry 17(1): 31-38

The effects of increased acid deposition on some biochemical and chemical properties of bracken litter overlying a podzolic soil contained in monolith lysimeters were investigated. Pairs of lysimeters each received 1500 mm yr-1 of "rain" consisting either of distilled water or pH 3.0 sulfuric acid applied evenly over a 5 yr period. The acid-treatment resulted in a marked acidification of the litter, associated with accelerated leaching of Ca2+, Mg2+, K+ and Mn2+. Acid treatment also increased the concentration of extractable Al3+ in the litter. The biochemical changes observed in the litter as a consequence of acidification included decreases of 33% in ATP content and 54% in respiration rate. Significant reductions in the mineralization rates of urea, glucose and acetate, and in the activities of 4-nitrophenylphosphatase, .beta.-N-acetyl-D-glucosaminidase, exo-1,4-.beta.-D-xylosidase and peroxidase were also observed in the acid-treated litter. The acid-treated litter also contained slightly less total N, ammonium-N and total P, and slightly more residual hexose carbohydrate than the control litter. The effects observed were consistent with a decrease in microbial activity associated with litter acidification and were reflected in a small (5.5%) but significant (P < 0.05) decrease in litter decomposition. Acid treatment decreased the ATP content of the mineral soil by .apprx. 13% in the 3 cm immediately beneath the litter, but below this depth no significant difference was observed.


DOI: 10.1016/0038-0717(85)90087-2

Other references

Halliday, J., 1994: Providing quality experiences. Nursing Standard 1987) 9(5): 21-23

Puliafito, C.A.; Wasson, P.J.; Steinert, R.F.; Gragoudas, E.S., 1984: Neodymium-YAG laser surgery on experimental vitreous membranes. A Q-switched neodymium-YAG laser was used to cut experimental vitreous membranes in rabbit eyes. We were able to cut vitreous membranes up to 4 mm from the retinal surface using single pulse energies of up to 4 mJ without fluorescein angiographic...

Sbaih, L.C., 1998: Is nursing becoming too technical?. Accident and Emergency Nursing 6(1): 1-1

Wu, Y-Lan.; Zhou, L.; Lu, Y., 2016: Intrathecal chemotherapy as a treatment for leptomeningeal metastasis of non-small cell lung cancer: A pooled analysis. NlmCategory="UNASSIGNED">Leptomeningeal metastasis (LM) is increasingly common in patients with non-small cell lung cancer (NSCLC) due to improved treatment, and ultimately, prolonged patient survival. The current study is a pooled an...

Anonymous, 1988: What is your preferred method, configuration, and instrumentation for anterior capsulotomy?. Journal of Cataract and Refractive Surgery 14(4): 445-451

Halsell, G., 1976: Nicole Maxwell, lady of the rain forest. Prevention 28 (2) 56-60

Hohl, P.; Angehrn, P.; Then, R.; Hebeisen, P.; Heinze Krauss, I., 1998: Ro 63-9141 , a novel broad-spectrum anti-MRSA pyrrolidinone cephalosporin Part I Activity against aerobic gram-negatives. Abstracts of the Interscience Conference on Antimicrobial Agents & Chemotherapy 38: 238

Jordaan J.H.; Smedley S., 1971: Synthesis and hydro boration of a 3 c methylene derivative of 2 amino 2 deoxy d glucose. Carbohydrate Research 18(2): 303-309

Rash, J.E.; Davidson, K.G.V.; Yasumura, T.; Furman, C.S., 2004: Freeze-fracture and immunogold analysis of aquaporin-4 (AQP4) square arrays, with models of AQP4 lattice assembly. Each day, approximately 0.5-0.9 l of water diffuses through (primarily) aquaporin-1 (AQP1) channels in the human choroid plexus, into the cerebrospinal fluid of the brain ventricles and spinal cord central canal, through the ependymal cell lining,...

Nagel, E.; Schattenfroh, S.; Bühner, S.; Bartels, M.; Guthy, E.; Pichlmayr, R., 1993: Animal experiment studies of ultrastructural changes in the lamina propria of the ileum caused by dietary fats and comparison with cytopathology in Crohn disease. Experimental investigations have shown alterations of the ileal mucosal surface after specific fat diets resembling early changes in Crohn's disease. An animal experiment in pigs has been conducted. After creation of an anisoperistaltic segme...