Mineralization of15N-labelled legume residues in soils with different nitrogen contents and its uptake by Rhodes grass
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Soil was collected from pots that had grown 1,3 or 6 soybean (Glycine max) or Siratro (Macroptillium atropurpureum) crops that had received organic residue returns from each crop.15N-labelled residues were added to half the pots in the experiment and the other half left unamended. Half of each group was then sown to Rhodes grass (Chloris gayana) which was grown, under glasshouse conditions, for 12 weeks.
Ten grams of organic matter residues were added to each pot (1.5 kg soil) and the pots subjected to two wetting and drying cycles. At the end of the second wet cycle, soil mineral N values ranged from 6 to 64 ppm in unamended soils and from 19 to 177 ppm in amended soils. These levels generally declined over a 12 week period both in the presence and absence of sown grass.
Nitrogen uptake by the grass increased with the number of previous cycles and was higher in Siratro than soybean soils. Recovery of15N by plant growth from the incorporated soybean residues was little effected by previous crop history and averaged 15.4%. On the other hand, Siratro recoveries were 13.7, 42.4 and 55.5% from soils that had grown 1, 3 and 6 previous Siratro crops, respectively.
The addition of organic residues stimulated the release of native organic N (positive priming effect) on all soils.
These results show that the turnover rate of nitrogen from organic residues can be high and the net result of these additions depends on the nature of the organic residues and the soil system to which they are added. These data emphasise the need to consider the rate of nutrient turnover from organic sources rather than concentrate on the nature and size of the resident nutrient pools.
- Agarwal, A. S., Singh, B. R. and Kanehiro, Y. 1971 Soil carbon and nitrogen mineralization as affected by dry-rewetting cycles. Soil Sci. Soc. Am. Proc.35, 96–100.
- Allison, F. E. 1973 Soil organic matter and its role in crop production.In Development in Soil Science3, Elsevier N.Y.
- Allison, F. E. and Klein, C. J. 1962 Rates of immobilization and release of nitrogen following additions of carbonaceous materials and nitrogen to soils. Soil Sci.93, 383–386.
- Balastrieri, C. 1968 An improved procedure for the measurement of15N content by mass spectrometry. Life Sci.7, 269–274. CrossRef
- Birch, H. F. 1958 The effect of soil drying on humus decomposition and nitrogen availability. Plant and Soil10, 9–31. CrossRef
- Birch, H. F. 1964 Mineralization of plant nitrogen following alternate wet and dry conditions. Plant and Soil20, 43–49. CrossRef
- Blair, G. J. and Boland, O. W. 1978 The release of phosphorus from plant material added to soil. Aust. J. Soil Res.16, 101–111. CrossRef
- Bremner, J. M. 1965 Inorganic forms of nitrogen.In Methods of soil analysis. Ed. C. A. Black. Part2. Agron. Mono.9, pp 1179–1237.
- Broadbent, F. E. 1965 Effect of fertilizer nitrogen on the release of soil nitrogen. Soil Sci. Soc. Am. Proc.29, 692–696.
- Cornforth, I. S. and Davies, J. B. 1968 Nitrogen transformations in tropical soils. I. Mineralization of nitrogen-rich organic materials added to soil. Trop. Agric. Trinidad45, 211–221.
- Harmsen, G. W. and Kolenbrander, D. K. 1965 Soil inorganic nitrogen.In Soil Nitrogen. Eds. W. V. Bartholomew and F. E. Clark. Agron. Mono.10, pp 43–92. A.S.A. Madison, Wisc.
- Martin, A. E. and Ross, P. J. 1968 Significance of errors in15N measurements in soil: plant research.In Trans. XI Int. Soc. Soil Sci. Adelaide3, 521–529.
- Martin, A. E., Henzell, E. F., Ross, P. J. and Haydock, K. P. 1963 Isotopic studies on the uptake of nitrogen by pasture grasses. I. Recovery of fertilizer nitrogen from soil: plant system using Rhodes grass in pots. Aust. J. Soil Res.1, 169–184. CrossRef
- McMullen, F. 1966 The nutrient status of granite soils from the Bendemeer area of New South Wales. Aust. J. Exp. Agric. Anim. Husb.6, 17–21. CrossRef
- Megusar, F. 1968 Depressing effects on mineralization caused by the addition of mineral nitrogen to soil.In Isotopes and radiation in soil organic matter studies. Proc. I.A.E.A. Symposium, Vinna, pp 143–149.
- Newman, A. C. D. 1966 The distillation of ammonia for isotopic analysis. Chem. Ind.15, 115–116.
- Nolan, J. V. 1971 Nitrogen metabolism in sheep. Ph.D. Thesis. University of New England. Armidale, N.S.W.
- Power, J. F. 1968 Mineralization of nitrogen in grass roots. Soil Sci. Soc. Am. Proc.32, 673–674.
- Rothamsted 1968 Rothamsted Annual Report 1968 Part II: 97.
- Schreven, D. A. van 1968 Mineralization of carbon and nitrogen from plant material added to soil and of humus during incubation following periodic drying and wetting. Plant and Soil27, 226–245. CrossRef
- Thomas, R. L., Sheard, R. W. and Moyer, J. R. 1967 Comparison of conventional and antomated procedures for nitrogen, phosphorus and potassium analysis of plant material using a single digestion. Agron. J.59, 240–243.
- Vallis, I. and Jones, R. J. 1973 Net mineralization of nitrogen in leaves ofPhaseolus atropurpureus and leaf litter ofDesmodium intortum andPhaeseolus atropurpureus mixed with soil. Soil Biol. Biochem.5, 391–398. CrossRef
- Walunjkar, W. G., Bartholomew, W. V. and Woltz, W. G. 1959 Nitrogen interchange in soil as affected by soil type, source and rate of nitrogen addition, moisture and time of incubation. J. Indian Soc. Soil Sci.7, 65–72.
- Yaacob, O. and Blair, G. J. 1979 Effect of legume species and cropping intensity on the nitrogen status of a granite soil under a simulated tropical environment. Plant and Soil52, 85–97. CrossRef
- Mineralization of15N-labelled legume residues in soils with different nitrogen contents and its uptake by Rhodes grass
Plant and Soil
Volume 57, Issue 2-3 , pp 237-248
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