fact sheets FLOOD IRRIGATION

Transcription

1 TECHICAL OTE TECHICAL OTE DETERMIIG THE LOSS OF ITROGE THROUGH FLOOD DETERMIIG THE LOSS OF ITROGE THROUGH FLOOD FROM BIODUDER LIQUID FERTILISERS FROM BIODUDER LIQUID FERILISERS Wilmar Bioethanol (Australia) Pty Ltd provides liquid fertiliser Crop products based on Biodunder which is a potassium rich byremoval Wilmar from Bioethanol Pty Ltd The provides based on dunder product Sara(Australia) Bioethanol Distillery. productsliquid fertiliser productsputs: Gaseous Fertilser have been effective supplyg nutrients to sugarcane crops which is a potassium rich by-product from Sara Bioethanol Distillery. The products & Crop have atomosphere across region. An creasg focus on managg nitrogen uptake Crop residue been effective supplyg nutrients to sugarcane crops across region. An creasg use efficiency sugarcane systems has risen dustry Volatilisation focus on managg nitrogen efficiency Barrier sugarcane systems Meral dustry as Denitrificationhas risen as a means to avoid excess nutrientuse loadg on Great a means to avoid nutrient loadg on GreatRunoff Barrier Reef catchment areas. The Reef catchment areas. excess The vestigation of determg itrate Ammonium Organic of nitrogen sugarcane systems vestigation of determg of nitrogen sugarcane systems usg usg Biodunder based high liquid fertilisers compared Biodunder based high liquid fertilisers compared to traditional products was undertaken to traditional products was undertaken to ensure product Leachg Claytrial merals to ensure product performance and was environmental mataed. A study performance and environmental protection mataed. protection was A trialconducted study was conducted Burdek, QLD demonstrated which was Burdek, QLD which that surface application of demonstrated that surface application of Biodunder Biodunder liquid fertiliser product- Hi were productively sustaable and adequately liquid fertiliser product- Hi were productively sustaable reduced nitrogen from draage. and adequately reduced nitrogen from FIGURE 2: SCHEMATIC DIAGRAM OF THE ITROGE draage. Flood Irrigation Flood Irrigation CYCLE. SOURCE: BSES 26. As seen Figure 2, conversion of nitrogen fertiliser to nitrate can lead to eir gaseous from denitrification, leachg or run-off. The run-off process occurs water converts fertiliser to nitrate (O3) or ammonia (H3), more soluble forms which are readily carried away from soil with lateral water movement. The surface application of Biodunder Liquid Fertiliser onto bed rows to reduce nitrogen loss from draage water. Objectives In 26 a trial study Burdek was undertaken with FIGURE 1:1: TYPICAL SET SET UP FOR FOR SUGARCAE SYSTEMS I THE BURDEKI QLD. FIGURE TYPICAL UPFLOOD FOR FLOOD followg objectives: FOR SUGARCAE THE BURDEKI QLD., Run-off: In SYSTEMS case of Irun-off from term is referred to run-off lateral Determe nutrient movement from traditional granules, granules+raw biodunder and Biodunder Hi movement ofcase water from from crop systems from Run-off: In of run-off, term events. The of nitrogen Formulation durg a Barratas clay soil is referred to lateral movement water from crop systems from draageofwater are similar to that of run-off as seen Figure 1. from events. The of nitrogen from draage water are similar to that of run-off as seen Figure 1. Burdek region; and C ompare effect of applyg fertiliser treatments at different timgs prior to first and second s

2 Trial Details Treatments cluded two traditional methods of application cludg subsurface application of nitrogen and a surface application of Biodunder liquid fertiliser product- Hi. These treatments were also applied at different timgs to determe wher application of fertiliser prior to 2nd was beneficial rar than 1rst. In addition application 3 days prior and 1 day prior was tested to determe wher any nitrogen would change. Details of trial treatments are provided Figure 3. Flood Irrigation Trial: Application Treatments Treatments Details Control 1. o Fertiliser PKS Conventional (Granules: SUB-SURFACE) 2. Applied 1 day prior to 1st 3. Applied 1 day prior to 2nd 4. Applied 3 days prior to 1st PS Conventional (Granules: SUB-SURFACE) + Raw Dunder (SURFACE) K 5. Applied 1 day prior to 1st 6. Applied 3 days prior to 2nd 7. Applied 1 day prior to 2nd 8. Applied 3 days prior to 2nd 9. Applied 1 day prior to 1st Biodunder Hi- (SURFACE) 1. Applied 3 days prior to 2nd 11. Applied 1 day prior to 2nd Ridge Furrow Biodunder Hi- (PKS) Granules (PKS) Granules (PS) + Dunder Topdress (K) FIGURE3: DETAILS OF TREATMETS OF PRODUCTS AD TIMIGS OF ITROGE APPLICATIO I A FLOOD SUGARCAE SYSTEM. Water draage samples were collected on first, second and third event and sent for analysis for total nitrogen (T), ammonium and nitrate for each treatment.

3 Electrical Conductivity (EC) Key FIGURE 4: GRAPH ILLUSTRATIG THE ACCUMULATIO OF SALTS (µs/cm) I RU-OFF AD APPLICATIO Total itrogen (T) 5 Total itrogen T Total itrogen loss (kg /ha) Flood water for each period for all nutrition treatments Total itrogen (kg /ha) FIGURE 4: GRAPH ILLUSTRATIG THE LOSS OF TOTAL ITROGE (T) (KG/HA) I FLOOD RU-OFF AD APPLICATIO

4 Ammonium Content Ammonium Content Ammonium (kg /ha) Flood water for each period for all nutrition treatments Ammonium (kg /ha) FIGURE 5: GRAPH ILLUSTRATIG THE LOSS OF AMMOIUM (KG/HA) I FLOOD RU-OFF AD APPLICATIO FIGURE 5: GRAPH ILLUSTRATIG THE LOSS OF AMMOIUM (KG/HA) I FLOOD RU-OFF AD APPLICATIO itrate/itrite Content itrate/itrite Content 1.8 itrates/itrites (kg /ha) Flood water for each period for all nutrition treatments 1.6 Ox (kg /ha) FIGURE 6: GRAPH ILLUSTRATIG THE LOSS OF TOTAL ITROGE (T) (KG/HA) I FLOOD RU-OFF AD APPLICATIO

5 FIGURE 6: GRAPH ILLUSTRATIG THE LOSS OF TOTAL ITROGE (T) (KG/HA) I RU-OFF AD APPLICATIO Productivity Results Summary Productivity results were collected when trial was harvested and measured cane production, sugar production and CCS. Based on results from this study several nitrogen management aspects are highlighted. Productivity Results Productivity results were collected when trial was harvested and measured cane production, Despite havg different resultssignificantly for water quality, The timg of prior to sugar production andsignificantly CCS. Despite havg different results fornitrogen water fertiliser quality,application all all treatments (except for control) had no statistical has a significant fluence on potential flux of nitrogen reatments (except yield, control) noand statistical for cane yield, sugar yield and difference forfor cane sugarhad yield CCS as difference seen durg. Application of any form of fertiliser CCS as Figure seen 7. Figure 7. Average Productivity Results for Fertiliser Applications Traditional Granules o significant differences nutrient between fertiliser applications prior to 1st or 2nd. This may be due to fact that 14 days between is not effective wettg soil profile as it is too far apart. Sugar Yield (t/ha) W hen selectg nitrogen fertiliser and application methods, Biodunder Hi surface treatment had least flux of salt and nitrogen forms, particularly when applied 3 days before. Control Cane Yield (t/ha) CCS 3 days prior to will reduce of runoff compared to those applied one day before. utrient programs should carefully consider timg when tegrated with a schedule. FIGURE 7: GRAPH ILLUSTRATIG THE AVERAGE PRODUCTIVITY PERFORMACE FOR VARIOUS. References BBIFMAC (26) The Fate of utrients Applied Biodunder and Hi-. Contacts ame Title Contact George Russell Agribusess Agronomist - Sourn oel Wright Agribusess Agronomist - orrn Liana Lillford R&D Agronomist