ICFR Central Regional Field Day

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ICFR Central Regional Interest Group Field Day,www icfr ukzn ac za. Date Thursday 18th October 2012, Venue Ignite Charcoal Factory near Paulpietersburg. GPS 27 24 45 83 S 30 40 33 39 E,Time 08h30 for 09h00. 08h30 Meet for tea and coffee,Indoor Presentations. 09h00 Welcome and objectives for the field day Johan Nel TWK. Testing pelargonic acid Scythe and pyraflufen ethyl. 09h10 glyphosate Guild as alternatives to paraquate dichloride Keith Little ICFR. Gramoxone for the preparation of tracer belts, A comparison of different planting methods incorporating.
09h25 hydrogels and fertiliser and their effect on survival and Marnie Light ICFR. growth at rotation end in a Eucalyptus grandis trial. Is climate change happening Comparing local,09h55 Ilaria Germishuizen ICFR. knowledge and global predictions, Results obtained from a pot trial to assess several. 10h25 chemical and biological products to potentially control Ryan Nadel ICFR. white grub, Insect pests of Eucalyptus challenges and opportunities. 11h25 Brett Hurley FABI,for their management,Stellenbosch. 11h55 Precision Forestry Simon Ackerman,University.
The effect of compaction and residue management on. 12h30 soil properties and early Eucalyptus growth on a granite Diana Rietz ICFR. derived soil, Forest Engineering research and development s latest. 13h00 advancements with a focus on compartment road Glynn Hogg FESA. 13h30 LUNCH,14h30 Field Visits, 15h00 Mulching for the future Willi Gevers Private. 15h45 Discussion in field on compartment road planning Glynn Hogg FESA. 16h15 End of field day, Please note Hard hats and closed shoes to be worn for the field stop. ICFR Central Region Field Day,ICFR October 2012 Page 2. Testing pelargonic acid Scythe and pyraflufen ethyl glyphosate Guild. as alternatives to paraquate dichloride Gramoxone,for the preparation of tracer belts.
Keith M Little,keith little icfr ukzn ac za, Institute for Commercial Forestry Research PO Box 100281 Scottsville Pietermaritzburg 3209. Trial Information,Company Mondi Shanduka Newsprint. Plantation Willomere Estate,Date Implemented 22 April 2012. Weather Clear sunny and windless,Date Completed September 2012. Altitude 1706 m,Lat Long 19 25 840 E 29 51 016 S,Treatments.
Treatments Rate,1 Control untreated,2 Scythe 2 or 2 L ha. 3 Scythe 3 or 3 L ha,4 Scythe 4 or 4 L ha,5 Scythe 5 or 5 L ha. 6 Scythe mix 2 pelargonic acid 1 glyphosate,7 Guild 0 5. 8 Guild 1 or 1 L ha,9 Guild 2 or 2 L ha,10 Glyphosate 1 or 1 L ha. 11 Paraquat 3 75 or 3 75 L ha,Sequence of events,Date Implemented 22 April 2012.
Time of spraying 8h00 11h30,Temp 19 26 C shade 22 29 C sun. 1 Assessment 5 May 14 days after treatment, 3 x images analysed for percentage cover of living vegetation per plot. Burning of firebreak Mid May,2 Assessment Vegetation regrowth on 24 September. ICFR Central Region Field Day,ICFR October 2012 Page 3. Conclusions, Need a product that provides rapid browning desiccation of above ground portion of vegetation.
provides opportunity for burning of sprayed area when rest of area still green. Need product that will not kill below ground portion of vegetation erosion area open to invasion. from unwanted vegetation, Final assessment in Spring following regrowth if any will provide greater insight. ICFR Central Region Field Day,ICFR October 2012 Page 4. A comparison of different planting methods incorporating hydrogels and fertiliser. and their effect on survival and growth at rotation end. in a Eucalyptus grandis trial,Marnie E Light Paul WM Viero and Keith M Little. marnie light icfr ukzn ac za, Institute for Commercial Forestry Research P O Box 100281 Scottsville Pietermaritzburg 3209. Introduction, In 2002 three trials were implemented to assess the effect of Aqua soil a soil amended hydrogel.
combined with nutrients versus regular granular fertiliser on eucalypt re establishment across diverse. sites covering a range of soils climate and tree species Viero and Little 2006 The aim of the trial series. was to investigate the effect that different planting methods incorporating soil ameliorating products had. on survival and growth of eucalypts on contrasting sites Table 1 Of the three trials situated in Piet. Retief Zululand and the KwaZulu Natal Midlands two were prematurely terminated whereas the. KwaZulu Natal Midlands trial at Eston Table 2 was continued until rotation end. Experimental design and treatments, Four replicates in a randomised complete block design RCBD. 2 x 2 factorial Stockosorb 400 K at 0 or 3 g L and or fertiliser at 0 or 120 g tree. Three additional controls dry plant Aquasoil at 5 or 10 g L. Tree spacing of 2 x 3 m 1667 stems ha, Whole plot of 6 x 6 36 trees measured inner plot of 4 x 4 16 trees. Table 1 Description of treatments for a Eucalyptus grandis re establishment trial situated at. Eston KwaZulu Natal,Treatment Description per seedling. Seedling placed directly into planting pit,without any water hydrogel or fertiliser. water plant 1 L water added into planting pit,stock 3 g Stockosorb 400 K in 1 L water.
fert 1 L water 120 g 3 2 1 N P K 22, stock fert 3 g Stockosorb 400 K in 1 L water 120 g 3 2 1. aquasoil 5g 5 g Aquasoil in 1 L water,aquasoil 10g 10 g Aquasoil in 1 L water. Please note The use of these products are not endorsed by the ICFR and were used for experimental. purposes The hydrogel Stockosorb 400 K and Aquasoil are no longer commercially available and. have been replaced by other products which are newly formulated and different to those used in this trial. and thus cannot be used for comparative purposes,ICFR Central Region Field Day. ICFR October 2012 Page 5, Table 2 Site characteristics and information for a Eucalyptus grandis re establishment trial. situated at Eston KwaZulu Natal,Latitude 29 52 24 S.
Longitude 30 24 04 E,Altitude 900 m a s l,Mean annual rainfall temperature 850 mm 17 C. Climate Warm temperate,Taxonomy SA Mispah,Parent material Dwyka Tillite. Soils Effective rooting depth 0 4 m,Texture Loam,Organic carbon 4 12. Species planted E grandis seedlings,Date planted 22 November 2002. Mean mean minimum Mean 23 1,Conditions 7 days and mean maximum Mean min 16 4.
prior to planting temperatures C Mean max 30 7,Rainfall mm 0 7. Gravimetric soil water,Conditions on the content,day of planting Rainfall mm 0 5. Mean temp C 27 4,Mean mean minimum Mean 15 7,Conditions 7 days and mean maximum Mean min 9 3. after planting temperatures C Mean max 24 8,Rainfall mm 21 8. 24 June 2010,Date felled,2 771 d 7y 7m, Table 3 Treatment related re establishment operations and associated costs R ha rounded off.
to the nearest R10 for a Eucalyptus grandis re establishment trial situated at Eston. KwaZulu Natal Costs are the total mean value associated with the different operations. 2010 pricing and will differ according to region and company. Re establishment treatment,Re establishment, dry plant water plant fert stock fert stock aquasoil aquasoil. Site preparation,Pre plant spray,Mark and pit,Fertilisation. Aquasoil 5g,Aquasoil 10g,Total cost R 3540 3940 4890 4200 5150 4380 4810. ICFR Central Region Field Day,ICFR October 2012 Page 6. Table 4 Ranking of treatments in terms of rotation end tree performance merchantable volume. and re establishment input costs R ha in a Eucalyptus grandis trial situated at Eston. KwaZulu Natal South Africa Re establishment input costs as per Table 3 which. include costs from site preparation up to and including planting. Treatment ranked according to,level of significance at p 0 05.
for merchantable volume,water plant dry plant,Input costs Medium. stock aquasoil 5 g,Table 3 R4 000 R4 500,aquasoil 10 g. R4 500 stock fert, Merchantable volume m ha determined on a hectare basis for underbark volume to a thin end diameter of 5 cm. Conclusions, Planting without water or hydrogel gave the poorest survival and final merchantable volume. Planting with water or Stockosorb 400K significantly improved survival. Application of a granular fertiliser did not improve growth. The use of Aquasoil gave inconsistent results and was not shown to be better than the treatments. with granular fertiliser, In terms of the best improvement at the lowest cost the addition of 1 L of water into the planting pit.
puddle planting was shown to be the best method, The use of Stockosorb 400K or alternative hydrogel is also a suitable option under adverse. conditions as supported by previous research Viero 2007 Viero and Button 2007. References, Viero PWM and Little KM 2006 A comparison of different planting methods including hydrogels and. their effect on eucalypt survival and initial growth in South Africa Southern African Forestry. Journal 208 5 13, Viero PWM 2007 Planting eucalypts using hydrogels ICFR Technical Note 03 2007 Pietermaritzburg. Institute for Commercial Forestry Research pp 1 4, Viero PWM and Button GA 2007 Eucalypt re establishment using water or hydrogels in comparison to. dry planting for ten trials in South Africa ICFR Bulletin Series 12 2007 Pietermaritzburg Institute. for Commercial Forestry Research pp 1 14,ICFR Central Region Field Day.
ICFR October 2012 Page 7,Is climate change happening. Comparing local knowledge and global predictions,Ilaria Germishuizen. ilaria germishuizen icfr ukzn ac za, Institute for Commercial Forestry Research PO Box 100281 Scottsville Pietermaritzburg 3209. Introduction, Global predictions for the next 50 to 100 years foresee an increase in temperature increase or decrease. in rainfall and an increase in the frequency and intensity of extreme events such as wind fire and. drought Most of the climate change research in relation to forests has up to now dealt mainly with the. role of forests in mitigating climate change natural forest monitoring and predicting changes in natural. forests composition whilst very little work has been done on the effects of climate change on plantation. forestry This presentation is made of three sections The first section deals with the observed changes in. weather trends over the past 50 years in Mpumalanga The second section describes the intermediate. 2045 2065 and future 2081 2100 climate change scenarios for South Africa The third section provides. some examples of how spatial models can assist the forestry industry through the change. Mpumalanga Weather 1950 2007, Thirty five rainfall stations and three temperature stations located in proximity of forestry areas and for.
which daily data was available were selected for this study Changes in climate patterns were analysed. by comparing two data subset 1950 1970 and 1987 2007 The parameters included to detect change. are mean annual precipitation MAP number of rainy days per year number of rainy days 40 mm. per year monthly rainfall average drier season rainfall mean annual temperature MAT mean. maximum temperature mean minimum temperature average number of hot days per year and average. number of cold days per year Results showed a general trend of increased rainfall variability from year. to year and a decrease in number of rainy days per year p 0 01 Figure 1. Rain Events 1950 1970 Rain Events 1987 2007,100 5 98 1. AVG n Rain events,Northern MP Central MP Southern MP. t 11 5 86 p 0 001 t 11 5 54 p 0 001 t 11 3 69 p 0 01. Figure 1 Average number of rainy days year, Only three temperature stations were available for the analysis making it impossible to identify trends. However at the station level temperature has also become more variable This simple analysis has. confirmed climate changes in line with predicted global trends and has highlighted the need to review. common practices such as regional planting windows and revaluate seasonal fire and drought risks. ICFR Central Region Field Day,ICFR October 2012 Page 8. Predicted MAT and MAP grids 2045 2065, The Climate System Analysis Group CSAG University of Cape Town South Africa has applied eight.
Global Circulation Models GCM downscaled at the regional level to 81 rainfall stations and 43. temperature stations and made the datasets available to the public in the form of 1 x 1 MAP and MAT. grids Overall future predictions indicate an increase in MAP of 0 82 to 3 89 and an increase in MAT of. 1 18 to 1 96, What does this mean to the forestry industry in South Africa Some examples on the. applications of the predicted MAP and MAT grids, The predicted MAP and MAT grids were used to develop a future forestry site classification to interpret. current research findings in a future climate scenario The future site classification was developed using. the same criteria adopted in the current ICFR forestry site classification Smith et al 2005 Predicted site. class distribution within the forestry areas is significantly different from the current distribution with an. increase in warmer and moister sites Figure 2,36 Current 1971 1990. 35 Intermediate 2046 2065,34 Future 2081 2100,Dry Moist Wet. Figure 2 Current and predicted rainfall classes distribution in commercial forestry areas. A decrease in frost and snow prone sites was also observed The predicted site classification was used to. map changes in site species suitability for the main commercially grown species to identify changes in

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