+ 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

Reversal of adverse effects of heavy ammonium sulphate application on growth and nutrient status of a Kikuyu pasture

, : Reversal of adverse effects of heavy ammonium sulphate application on growth and nutrient status of a Kikuyu pasture. Plant and Soil 48(1): 169-183

Adverse effects resulting from fertilization with high rates of ammonium sulfate were determined on a kikuyu grass (Pennisetum clandestinum) pasture grown on a krasnozem in a sub-tropical environment. Corrective fertilizer practices using lime and P were evaluated. Ammonium sulfate application (336 kg N/ha per annum for 4 yr followed by 672 kg N/ha per annum for 2 yr) decreased soil pH from 5.0-4.0. Under these conditions, soluble Al in the soil increased, while exchangeable Ca, Mg and K decreased. Concentrations of Ca, Mo and P in the kikuyu tops were lowered, while concentrations of Mn were raised. Liming to pH 5.5 promoted growth more at 672 kg N/ha/annum than at 134 kg N/ha/annum, while generally little further yield response occurred as soil pH was raised to about 6.0. Liming increased the concentrations of P, Ca, N and Mo but decreased Mn in kikuyu tops. P application decreased soluble Al in the soil in all N treatments, but only increased kikuyu yield where 672 kg N/ha per annum was applied. It did not alter plant chemical composition, except for an increase in P concentration. Yield increases to liming and P were attributed to the alleviation of Al toxicity in the high N treatments. Lime responses in low N treatments were due to improved N nutrition resulting from mineralization of organic N. Lime application reduced the amount of N fertilizer required for maximum growth of kikuyu from 672 kg N/ha per annum on the unlimed soil to 134 kg N/ha/annum, while maintaining an adequate level of nutrients in the herbage and avoiding the problems of excess soil acidity.


DOI: 10.1007/bf00015166

Other references

Grimsrud, K.N.; Ait-Oudhia, S.; Durbin-Johnson, B.P.; Rocke, D.M.; Mama, K.R.; Rezende, M.L.; Stanley, S.D.; Jusko, W.J., 2015: Pharmacokinetic and pharmacodynamic analysis comparing diverse effects of detomidine, medetomidine, and dexmedetomidine in the horse: a population analysis. The present study characterizes the pharmacokinetic (PK) and pharmacodynamic (PD) relationships of the α2-adrenergic receptor agonists detomidine (DET), medetomidine (MED) and dexmedetomidine (DEX) in parallel groups of horses from in vivo data a...

Martin, G.F.; Megirian, D.; Roebuck, A., 1971: Corticobulbar projections of the marsupial phalanger (Trichosurus vulpecula). I. Projections to the pons and medulla oblongata. Journal of Comparative Neurology 142(3): 275-295

Vintzileos, A.M., 2017: Measuring the impact of attending physician teaching in an obstetrics and gynecology residency program. American Journal of Obstetrics and Gynecology 217(5): 617-618

Lanzafame, R.J.; Naim, J., 1997: Preliminary assessment of the tissue effects of a 1.44-micron laser via direct fiber contact on soft tissue. A new pulsed near-infrared laser was developed for incision of soft tissues. This article presents a preliminary investigation of the 1.44-micron laser. A prototype laser was used with a cleaved 600-micron quartz fiber (1.44 microns, 5-30 Hz, 30 W...

Higashiura, Y.; Kashio, T., 1999: Some parasitoids emerging from Aphis gossypii Glover on eggplants and chrysanthemums. Proceedings of the Association for Plant Protection of Kyushu, 45: 93-94

Yanaka, M.; Chin, B.; Hayashi, Y.; Kumakura, N.; Hirasawa, M., 1966: Studies of normal human serum values. (11). Serum protein fractionation by cellulose acetate membrane method. Rinsho Byori. Japanese Journal of Clinical Pathology 14(5): 378-380

Wheeler, R.J.; Friday, D.F.; Burchfield, H.P.; Storrs, E.E., 1975: Use of the nine-banded armadillo for sampling soil insects for pesticide residue analysis. Environmental Quality and Safety. Supplement 3: 129-134

Yanagisawa, Y.; Piao, R.; Iguchi, S.; Nakagome, H.; Takao, T.; Kominato, K.; Hamada, M.; Matsumoto, S.; Suematsu, H.; Jin, X.; Takahashi, M.; Yamazaki, T.; Maeda, H., 2014: Operation of a 400MHz NMR magnet using a (RE:Rare Earth)Ba 2 Cu 3 O 7- x high-temperature superconducting coil: Towards an ultra-compact super-high field NMR spectrometer operated beyond 1GHz. High-temperature superconductors (HTS) are the key technology to achieve super-high magnetic field nuclear magnetic resonance (NMR) spectrometers with an operating frequency far beyond 1GHz (23.5T). (RE)Ba<sub>2</sub>Cu<sub>3<...

Zborowska-Sluis, D.T.; L'Abbate, A.; Klassen, G.A., 1974: Evidence of carbonic anhydrase activity in skeletal muscle: a role for facilitative carbon dioxide transport. Respiration Physiology 21(3): 341-350

Tengowski, M.W.; Feng, D.; Sutovsky, M.; Sutovsky, P., 2006: Differential expression of genes encoding constitutive and inducible 20S proteasomal core subunits in the testis and epididymis of theophylline- or 1,3-dinitrobenzene-exposed rats. Theophylline (THP) and 1,3-dinitrobenzene (DNB) are thought to induce infertility by incapacitating the nurturing Sertoli cells and causing germ cell apoptosis in the testicular seminiferous epithelium, respectively. We hypothesized that THP and...