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1181-Evaluation of the Urea Deep  Placement (UDP) Technology in Irrigated Lowland, Direct Seeded Rice in Guyana
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1181-Evaluation of the Urea Deep Placement (UDP) Technology in Irrigated Lowland, Direct Seeded Rice in Guyana

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PowerPoint by Herman Adams, CARDI, presented at the First Workshop on the System of Rice Intensification (SRI) in Latin America at EARTH University in Costa Rica, Oct. 31-Nov. 1, 2011

PowerPoint by Herman Adams, CARDI, presented at the First Workshop on the System of Rice Intensification (SRI) in Latin America at EARTH University in Costa Rica, Oct. 31-Nov. 1, 2011

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  • It originated from a CIAT accession P4382F3-70 – was selected for high quality grain, drought tolerance, and high yields in upland rainfed conditions
  • This cultivar has been selected and evaluated also for grain quality, milling and eating characters
  • Check on plant height as opposed to panicle length
  • Panoramic view of UDP trials before flowering; note different shades of green colour due to the different rates of N
  • THANK YOU!

1181-Evaluation of the Urea Deep  Placement (UDP) Technology in Irrigated Lowland, Direct Seeded Rice in Guyana 1181-Evaluation of the Urea Deep Placement (UDP) Technology in Irrigated Lowland, Direct Seeded Rice in Guyana Presentation Transcript

  • A CARDI PROJECT Prepared for the First International Workshop on Intensive Rice Production Sponsored by Cornell and EARTH Universities, Las Mercedes, Costa Rica 31 October – 1 November 2011 Evaluation of the Urea Deep Placement (UDP) Technology in Irrigated Lowland, Direct-Seeded Rice in Guyana Herman Adams and Bruce Lauckner, Collaborators: Ghansham Payman (GRDB) and Upendra Singh (IFDC)
  • OBJECTIVE
    • The objective of the rice trials is t o evaluate the UDP technology in the Caribbean by comparing it with the conventional method of broadcasting urea (UB) fertiliser into the flooded field over the rice transplants.
  • THE CARIBBEAN
  • BURMA RICE RESEARCH STATION IN GUYANA
  • BACKGROUND
    • Rice ( Oryza sativa L.) falls within the Cereal and Grain Legumes sub-programme of CARDI’s Crop Programme.
    • PROGRAMME STRATEGIC FOCI:
    • 1) Genetic improvement
    • The rice variety “CARDI-70” was released in Belize in 1988.
    • 2) Agronomic improvement
    • The innovative UDP technology, the placement of urea briquettes 7-10 cm below the roots of 14-day-old rice seedlings, has raised grain yields by 25% and reduced losses in N from 65% down to almost zero, in Bangladesh and Vietnam (IFDC).
  • METHODOLOGY
    • Location: Burma Rice Research Station –
    • Soils: frontland clays;
    • Mean Annual Temperature:19.8°C – 33.5°C; Mean annual rainfall: 2298 cm
    • Design: RCB
    • 7 treatments in a 3*2 factorial (UB and UDP);
    • Control = 0 Nitrogen
    • Time of application: UDP – 12-14 DAS and UB - conventional 3 split apps
    • Replications: 4
  • METHODOLOGY (cont’d) Table 1 The treatments 7 field trials were conducted between 2009 – 2010 in Guyana * A single control RATES OF N (kg/ha) METHOD OF UREA APPLICATION UREA BROADCAST (UB) UREA DEEP PLACEMENT (UDP) 57 UB 57 UDP 57 84 UB 84 UDP 84 122 UB 122 UDP 122 0 Control* Control*
  • METHODOLOGY (cont’d)
    • Plot size: 6 m x 8 m
    • Rice variety: G98-22-4
    • Seed rate: 120 kg/ha
    • Analyses at harvest from nett plot (2 m x 4 m):
    • Number of tillers per m²
    • Number of panicles per m²
    • Panicle length (cm)
    • 1000 grain weight (g)
  • METHODOLOGY (cont’d)
    • Number of filled grains per panicle
    • Number of unfilled grains per panicle
    • Grain yield per nett plot (kg)
    • Total dry matter at 14% moisture content (kg)
  • RESULTS AND DISCUSSIONS
    • Table 2 Data on grain yield (kg/ha) combined for all 7 trials
    LSD 0.05 = 514 Treatment Means Rank UB 84 3,455 I UDP 84 3,400 II UDP 122 3,380 III UB 57 3,287 IV UDP 57 3,144 V UB 122 3,124 VI Control 2,632 VII
  • Table 3 The best treatments which produced significant differences in the individual trials and for the combined data Parameters which showed significant differences Best treatments 1.Plant height in Trial # 1 UDP 57 and UB 57 2.Grain yield in Trial # 2 UDP 57 and UB 84 3.Grain yield in Trial # 3 UDP 84 and UB 57 4.Straw dry weight in Trial # 4 UDP 57 5.Filled grains in Trial # 6 UDP 57 6.Dry grain yield in Trial # 6 UDP 57 and UB 57 7.Wet grain yield in Trial # 6 UDP 57 8.Dry grain yield in Trial # 7 UDP 57 and UB 84 9.Wet straw weight in Trial # 7 UDP 57 and UB 57 10.Grain yield from combined data from all 7 trials UDP 57 and UB 57
  • CONCLUSIONS
    • The best treatments were UDP 57 and UB 57; they produced the tallest plants, the highest straw weight and yields which were not significantly lower than any other treatments.
    • These treatments however had the least input of N but were significantly higher than the Control of no N. This means that these two treatments would produce good yields at a low cost of production, urea being the single most costly input.
    • No advantage was demonstrated by UDP 57 over UB 57.
  • CHALLENGES & OPPORTUNITIES
    • Further work should measure and compare costs of production and the effects of the residual N left in the soil, for the following crop.
    • Large scale field trials are required to study costs of production.
    • The next phase should evaluate mechanised minimum-till sowing with simultaneous placement of fertiliser briquettes (UDP) with plant nutritional needs during the entire cropping cycle.
  • Figure 1 Panoramic view of UDP trials before flowering; note difference in green leaf colour between plots
  • Figure 2: View of plots before harvest
  • Figure 3: Highest rate of N caused extensive lodging
  • Thank you