Abstract
A factorial experiment was established in a plantation of Eucalyptus nitens in southern Tasmania on a site which had formerly carried native eucalypt forest. Before planting, the site had been cleared of weeds with foliar translocated and pre-emergence herbicides. The first factor of the experiment examined the effects on tree growth of no post-planting weed control, control by hand or with three levels of application of granulated atrazine, 0.9, 1.8 and 8 kg ha−1. The second factor examined the effects of no fertiliser application or the application of nitrogen as urea at 200 kg ha−1 N plus triple superphosphate at 120 kg ha−1 P. Tree growth responses to treatments were examined at 11, 16, 23 and 29 months of age.
Fertiliser application increased tree height and diameter growth. Application of atrazine generally reduced height and diameter growth, but this was statistically significant only at the highest rate of application. Growth reduction occurred even though atrazine reduced post-planting weed cover on the site and hence potential competition with the tree crop for site resources. Hand weeding reduced the weed crop on the site even more than atrazine, but this did not increase growth of the tree crop.
Given satisfactory establishment practices which include the use of herbicides pre-planting, it was concluded that post-planting weed regeneration was not sufficiently vigorous to warrant post-planting weed control on these sites. The use of atrazine for post-planting weed control could even be deleterious to eucalypts.
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References
Anon. 1986. The weed-a-metre. New Zealand Forest Service, FRI News No 4.
Anon. 1990/91. Australian Forest Resources. Australian Bureau of Agricultural and Resource Economics, 34 pp. Australian Government Publishing Service, Canberra.
Beadle, C. L. and Mummery, D. C. 1990. Stand growth and development of leaf area index in young plantations of Eucalyptus nitens at 2×2 m spacings. N.Z. Forest Service F.R.I. Bull. 151: 254–257.
Cameron, J. T. and Penna, I. W. 1988. The Wood and the Trees. Australian Conservation Foundation, Melbourne.
Cameron, J. N. and Turvey, N. D. 1977. Weed control and nutrition of eucalypt plantations. Proc. A.F.D.I. Conf., Traralgon, Vic., October 1977, pp. 98–103.
Cromer, R. N., Cameron, D., Cameron, J. N., Flinn, D. W., Neilsen, W. A., Raupach, M., Snowdon, P. and Waring, H. D. 1981. Response of eucalypt species to fertiliser applied soon after planting at several sites. Aust. For. 44: 3–13.
Ebert, E. and Dumford, S. W. 1976. Effects of triazine herbicides on the physiology of plants. Residue Rev. 65: 1–103.
Ellis, R. C., Webb, D. P., Grayley, A. M. and Rout, A. F. 1985. The effect of weed competition and N nutrition on the growth of seedlings of Eucalyptus delegatensis in a highland area of Tasmania. Aust. For. Res. 15: 395–408.
FAFPIC 1989. Potential role of hardwood plantations in supplementing Australia's forest resources. Forest and Forest Products Industry Council, Position Statement. 18 pp.
Fagg, P. C. 1988. Weed control techniques for the establishment of Eucalyptus regnans plantation on pasture sites. Aust. For. 51: 28–38.
Flinn, D. W., Stewart, H. T. L. and Shaughnessy, P. J. 1979. Screening of weedicides for overspraying Eucalyptus, Pinus and Casuarina on clay soils irrigated with treated effluent. Aust. For. 42: 215–225.
Florence, R. G. 1988. Silviculture of even-aged stands of Eucalyptus, Acacia and Casuarina. In Proceedings of the international forestry conference for the Australia bicentenary. Vol. III. Australian Forest Development Institute.
Honeysett, J. L., Beadle, C. L. and Turnbull, C. R. A. 1992. Evapotranspiration and growth of two contrasting species of eucalypts under non-limiting and limiting water availability. For. Ecol. Man. 50: 203–216.
Hopmans, P. and Flinn, D. 1991. Stem deformity in Radiata Pine in relation to soil fertility, p. 35. In: Ryan, P. J. (Ed) Productivity in Perspective. Third Australian Forest Soils and Nutrition Conference. Forestry Commission of New South Wales, Sydney.
Hunt, R. 1978. Plant growth analysis. Studies in Biology No 96. Arnold. 67 pp.
Lawrence, P. R. 1981. Provisional site index and yield tables for eucalypts in southern Tasmania. Forestry Commission, Tasmania.
Messina, M. G. 1990. Herbicides increase growth responses to fertiliser in a 5-year-old Eucalyptus regnans plantation. N.Z. J. For. Sci. 20: 168–175.
Nambiar, E. K. S. and Sands, R. 1993. Competition for water and nutrients in forests. Can. J. For. Res. 23: 1955–1968.
Neilsen, W. A. 1990. “Plantation Handbook.” Forestry Commission, Tasmania.
Revell, D. and Deadman, H. 1976. Planted hardwoods and weed competition, pp. 133–136. In: Chavasse, C. G. R. (Ed) The use of herbicides in forestry in New Zealand. FRI Symposium No 18. New Zealand Forest Service.
Sands, R. and Zed, P. G. 1979. Promotion of nutrient uptake and growth of Radiata Pine by atrazine. Aust. For. Res. 9: 101–110.
Schönau, A. P. G. and Herbert, M. A. 1989. Fertilising eucalypts at plantation establishment. For. Ecol. Man. 29: 221–244.
Sheets, T. J. 1970. Persistence of triazine herbicides in soils. Res. Rev. 32: 287–310.
Turnbull, C. R. A., Beadle, C. L., Traill, J. C. and Richards, G. 1992. Benefits, problems and costs of excavators and bulldozers used for clearing operations in Southern Tasmania. Tasforests 4: 45–55.
Waring, H. D. and Snowdon, H. D. 1985. Clover and urea as sources of nitrogen for the establishment of Pinus radiata. Aust. For. Res. 15: 115–124.
Wilkinson, G. R. and Neilsen, W. A. 1990. Effect of herbicides on woody weed control and growth of plantation eucalypt seedlings. Aust. For. 53: 69–78.
Will, G. M. and Hodgkiss, P. D. 1977. Influence of nitrogen and phosphorus stresses on the growth and form of Radiata Pine. N.Z. J. For. Sci. 7: 307–320.
Woods, P. V., Nambiar, E. K. S. and Smethurst, P. J. 1992. Effects of annual weeds on water and nitrogen availability to Pinus radiata trees in a young plantation. For. Ecol. Man. 48: 145–163.
Yortt, M. L. and Rowe, G. R. 1977. Tolerance of five eucalypt species to terbuthylazine plus terbumeton. Proc. New Zealand Weed and Pest Control Conference, 1977: 238–242.
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Turnbull, C.R.A., Beadle, C.L., West, P.W. et al. Effect of post-planting applications of granulated atrazine and fertiliser on the early growth of Eucalyptus nitens . New Forest 8, 323–333 (1994). https://doi.org/10.1007/BF00036732
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DOI: https://doi.org/10.1007/BF00036732