Pheng Sengxua Ben SamsonHeafee Stephan
Objectives Design integrated best-bet management options for rainfed transplanted and  direct-seeded rice and selected po...
2010 Activities1.   Water and nutrient response studies in the rainfed     lowland rice environment in Savannakhet and    ...
2010 Activities (cont)2.     Soil quality improvement options     •     On-station experiment     •     Treatments:       ...
Activity in 2011 DSOutput Title of activity                                         Location                              ...
Activity in 2011 WSOutput             Title of activity                         Location                                  ...
Activity in 2011 WS (cont)Output           Title of activity                       Location                               ...
Activity in 2012 DS Output               Title of activity                              Location                          ...
Activity in 2012 WSMile-   Activity descriptionstone2.1.2   Test new drought tolerant IRRI lines on-station. Sort out the ...
Water and nutrient response studies
Grain yield responses to fertilizer application in waternon-limiting growing conditionsSavannakhet province            Ave...
Soil quality improvement options
Grain yield Phone Ngame station     Treatment                    Mean     T1 Control                   2547     T2 Bentoni...
Grain yield Thasano station     Treatment                    Mean     T1 Control                   1666     T2 Bentonite 1...
Multi-location trial Laoimproved rice variety
Fig2. Yield at Phanomxay VillageThaphalanxay Dist 2010 WS                2500                2000Yield (kg/ha)            ...
Fig 5. Mean yield between Nongmakyor and Hieng village                6000                                          Nongma...
Rice-based crop rotation   systems (Post-rice)
Crop yield and income of farmers in different rice-based crop rotation systems (Phorntarn village,Phalanxay district) Trea...
Crop yield and income of farmers (Xesavang village, Phin district)          Treatment                        Crop yield (k...
Rice yield and income of farmer (Nongmangovillage, Soukhuma District)
Crop yield and income of farmers (Heng village,Soukkhuma district)        Treatment              Rice     DS 2010-2011 pos...
Results                       5000.00                       4500.00 Grain yield (kg/ha)                       4000.00     ...
Results                               Savannakhet                              Nakaso                                     ...
Results (cont)       Phornthong district (average of 3 farmers       Variety     FP        FYM      FYM+NPK       PNG1    ...
Results (cont)                                   Soukhuma                                                        FP       ...
Yield response to inorganic fertilizer                  Nakaso                       Phornyanang      Fertilizer rate     ...
Yield response to inorganic fertilizer            Sukhuma                        Mullapamork   Fertilizer rate      Yield ...
Yield response to inorganic fertilizer            Phornthong                            Phin    Fertilizer rate        Yie...
Conclusions There were only grain yield response to fertilizer but not to water    regime   No any effect of bentonite o...
Integration with other components Evaluation of rice variety use by farmers after the trial (Upland,  lowland and flooded...
Cropping systems and soil fertility management
Cropping systems and soil fertility management
Cropping systems and soil fertility management
Cropping systems and soil fertility management
Cropping systems and soil fertility management
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Cropping systems and soil fertility management

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Rice-based Systems Research: Regional Technical Workshop June 2012 Australian Centre for International Agricultural Research (ACIAR)

Pheng Sengxua
Ben Samson
Heafee Stephan

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Cropping systems and soil fertility management

  1. 1. Pheng Sengxua Ben SamsonHeafee Stephan
  2. 2. Objectives Design integrated best-bet management options for rainfed transplanted and direct-seeded rice and selected post-rice crops with farmers (including the use of appropriate machinery) Execute and evaluate participatory and adaptive experiments  adapt and fine-tune best-bet management options oriented towards conservation agriculture Conduct on-farm and on-station experiments to refine the basis of systems understanding with a particular focus on crop, soil, and water interactions  Soil amendment options and threshold boundaries  Improved cultivars  Crop establishment-weed interactions and their consequences  Optimized rice-forage-livestock systems
  3. 3. 2010 Activities1. Water and nutrient response studies in the rainfed lowland rice environment in Savannakhet and Champasack provinces  Water regime  W1: Rainfed conditions (no supplementary watering)  W2: Supplementary watering when needed  Fertilizer regime  Not fertilized  Fertilized (60-15-15)  Varieties  Savannakhet: PNG-1, TSN-2, TDK-6  Champassak: PNG-3, PNG-5, TDK-1
  4. 4. 2010 Activities (cont)2. Soil quality improvement options • On-station experiment • Treatments:  Single rice crop (control), no other treatment  Single rice crop + clay (Bentonite) low rate (1 t ha-1)  Single rice crop + clay (Bentonite) high rate (2 t ha-1)  Single rice crop + clay (Bentonite) low rate + OM application  Single rice crop + clay (Bentonite) low rate + Vigna unguiculata post-rice foodder crop 3. Multi-location trial Lao improved rice variety (five varieties)
  5. 5. Activity in 2011 DSOutput Title of activity Location Province District village2.1.1 Study the effect of different rice-based Savannakhet 3 3 crop rotation systems on productivity of rainfed lowlands in Southern Laos (special focus on economics) Champasack 2 42.2.1 Study methods of soil moisture Savannakhet Outoumphon Nachan conservation Champasack Pakxe Phonngam2.2.2 Study the effect of method of soil Champasack Phonthong Oupalard preparation on performance of grain legumes
  6. 6. Activity in 2011 WSOutput Title of activity Location Province District Village2.1.1 Study the effect of different rice- Savannakhet 3 3 based crop rotation systems Champasack 2 42.1.2 Multi-location variety Savannakhet 3 6 testing/evaluation Champasack 3 8
  7. 7. Activity in 2011 WS (cont)Output Title of activity Location Province District Village2.1.3 Direct seeding/dibbling in wet Savannakhet 1 1 (2F) season2.1.4 Tested the best practices of Savannakhet 3 4 lowland rice production systems (GAP), further develop the print Champasack 3 6 materials2.2.3 Aerobic rice variety selection in Savannakhet 2 3 (15F) Nong and Xepon
  8. 8. Activity in 2012 DS Output Title of activity Location Province District village2.1.1 Study the effect of different rice-based Savannakhet 4 7 (34f) crop rotation Champasack 3 4 (15f)2.2.1 Study methods of soil moisture Savannakhet Outoumphon Nachan conservation Champasack Parkxe Phonengam2.2.4 Perennial rice line screening and Savannakhet Xeporn Thakhong selection Champasack Parkxe Phonengam2.2.5 Improved sandy soil by bentonte Savannakhet Kaison Thasano application Champasack Parkxe Phornngam Direct seedling Champasack Parkxe Phornngam
  9. 9. Activity in 2012 WSMile- Activity descriptionstone2.1.2 Test new drought tolerant IRRI lines on-station. Sort out the list with other sets already tested by the colleagues. This material contains IR64 MAS lines with a very effective drought QTL.2.1.3 Multi-location variety testing/evaluation, including a few “lowland in the upland” sites.2.1.4 Testing and participatory evaluation for drill seeded rainfed rice, including weed control. Treatments are + and ++ fertilizer, and + and – herbicide, but with normal soil preparation.2.1.5 Perennial rice line screening and selection2.1.6 Advanced upland rice variety testing, possibly combined at selected sites with new direct seeding technique;2.2.3 Soil quality improvement (bentonite application on sandy soils) and post-rice crop2.2.5 Site specific nutrient management for lowland rice / field trials, data base development and analysis;4.3 Seed production in the dry season and dissemination of mini-rice kits for TDK-SUB1 variety (WS activity) including. Distributed according to flooding map and accompanied by info-flyer.
  10. 10. Water and nutrient response studies
  11. 11. Grain yield responses to fertilizer application in waternon-limiting growing conditionsSavannakhet province Average Yield (kg/ha)* Ave. yield Ave. % yield District Village Fertilized Unfertilized increase increase (kg/ha)Outhomphone Nachan 3,753 2,447 1,306 53.38 Pintai 4,199 2,409 1,790 74.30 Nadeua 3,881 1,978 1,903 96.21 Phalanxay Phorntarn 2,702 1,979 724 36.61 Atsaphone Nongdeun 5,314 3,171 2,413 67.58 Average 3,970 2,397 1,627 67.88Champassak provinceSanasomboune Nalak 3,840 3,273 567 17.34 Nakeo 3,644 2,490 1,154 46.35 Pakse Songnoi 4,288 2,912 1,376 47.25 Phonethong Phonesavan 3,979 2,620 1,359 51.87 Upplart 4,169 3,093 1,076 34.79 Average 3,984 2,878 1,106 38.43
  12. 12. Soil quality improvement options
  13. 13. Grain yield Phone Ngame station Treatment Mean T1 Control 2547 T2 Bentonite 1t/ha 2894 T3 Betonite 2t/ha 2794 T4 Bentonie 1t/ha + 0M 2 t 2705 T5 Bentonine 1t/ha + Vigna 2687 T6 Bentonite 3t/ha 3007
  14. 14. Grain yield Thasano station Treatment Mean T1 Control 1666 T2 Bentonite 1t/ha 3254 T3 Betonite 2t/ha 3453 T4 Bentonie 1t/ha +0M 2 t 1628 T5 Bentonine 1t/ha + vigna 2239
  15. 15. Multi-location trial Laoimproved rice variety
  16. 16. Fig2. Yield at Phanomxay VillageThaphalanxay Dist 2010 WS 2500 2000Yield (kg/ha) 1500 1000 500 0 TSN1 TSN2 TSN3 TSN8 Khao Khao Variety
  17. 17. Fig 5. Mean yield between Nongmakyor and Hieng village 6000 Nongmakyor Hieng 5000 4000Yield (kg/ha) 3000 2000 1000 0 PNG1 PNG3 PNG5 PNG6 TDK1 Varieties
  18. 18. Rice-based crop rotation systems (Post-rice)
  19. 19. Crop yield and income of farmers in different rice-based crop rotation systems (Phorntarn village,Phalanxay district) Treatment Crop yield (kg/ha) WS 2010 DS 2010-11 WS 2011 WS 2010 DS 2010-2011 WS (Rice) post rice crop 2011 income Kip (Rice) Rice Non Rice 1.128 0 1247 Rice Sweet corn Rice 1.128 4,880,000 2871 Rice Long bean Rice 1.128 2,100,000 2336 Rice Cucumber Rice 1.128 3,360,000 2765
  20. 20. Crop yield and income of farmers (Xesavang village, Phin district) Treatment Crop yield (kg/ha)WS DS 10-11 WS WS DS 10-11 post rice crop WS2010 2011 2010 Fresh yield income(Kip) 2011Rice Non Rice 1,700 0 0 1,353Rice Peanut Rice 1,700 Disease 0 2,800Rice Sweet corn (Sc) Rice 1,700 10,832 b 58,593,750 b 3,009Rice Water melon (Wm) Rice 1,700 155,810 a 229,315,313 a 2,919Rice Wc+Wm Rice 1,700 138,482 a 206,792,969 a 2,542Probability *** ***
  21. 21. Rice yield and income of farmer (Nongmangovillage, Soukhuma District)
  22. 22. Crop yield and income of farmers (Heng village,Soukkhuma district) Treatment Rice DS 2010-2011 post Rice yield rice crop income yield (kg/ha) Kip/ha (kg/ha)WS DS 2010- WS 2011 WS 2010 WS 20112010 11Rice Non Rice 2.750 0 2,500Rice Peanut Rice 2.750 5,000,000 3,800Rice Sweet corn Rice 2.750 8,000,000 3,200Rice Long bean Rice 2.750 71,500,000 3,700Rice Cucumber Rice 2.750 35,000,000 4,900Rice Non Rice+ 2.750 0 5,200 NPK
  23. 23. Results 5000.00 4500.00 Grain yield (kg/ha) 4000.00 3500.00 3000.00 2500.00 No tillage 2000.00 Tillage 1500.00 Transplanted 1000.00 500.00 0.00 TDK1 TDK11 PNG5 TSN2 Rice variety
  24. 24. Results Savannakhet Nakaso Phornyanang FP FP FYM 4500 4500 FYM FYM+NPK 4000 FYM+NPK 4000 3500 Grain yield (kg/ha) 3500Grain yield (kg/ha) 3000 3000 2500 2500 2000 2000 1500 1500 1000 1000 500 500 0 0 TDK1 TDK11 PNG3 TSN2 TDK1 TDK11 PNG3 TSN2 Variety Variety
  25. 25. Results (cont) Phornthong district (average of 3 farmers Variety FP FYM FYM+NPK PNG1 3381.78 2592.00 2759.11 PNG3 2981.36 2642.75 2896.80 PNG5 3152.71 3054.17 3095.23
  26. 26. Results (cont) Soukhuma FP 5000 FYM FYM+NPK 4000 Grain yield (kg/ha) 3000 2000 1000 0 PNG1 PNG3 PNG5 Variety
  27. 27. Yield response to inorganic fertilizer Nakaso Phornyanang Fertilizer rate Yield Fertilizer rate Yield N P2 O 5 K2O (kg/ha) N P2 O 5 K 2 O (kg/ha) 0 0 0 2268.9 0 0 0 3212.4 b 97 47 40 2934.0 93 47 9 4277.1 a 129 63 53 3172.8 125 62 13 4276.4 a 162 79 67 2502.6 156 78 16 4298.3 a CV 14.97 7.07 LSD 566.94 Prob. ns **
  28. 28. Yield response to inorganic fertilizer Sukhuma Mullapamork Fertilizer rate Yield Fertilizer rate Yield N P2 O 5 K2O (kg/ha) N P2 O 5 K 2 O (kg/ha) 0 0 0 1170.0 b 0 0 0 2669.7 c97 47 42 2507.3 a 92 46 40 3808.7 b129 63 56 2581.7 a 122 62 53 4081.0 b161 79 69 3422.3 a 152 78 67 4476.7 a CV 16.51 3.35 LSD 1209 380.76 Prob. ** **
  29. 29. Yield response to inorganic fertilizer Phornthong Phin Fertilizer rate Yield Fertilizer rate Yield (kg/ha) (kg/ha) N P2 O 5 K2O N P2O5 K2O 0 0 0 2510.9 b 0 0 0 2913.5 c 91 43 35 3049.3 ab 81 33 45 4513.9 b 121 57 47 3507.0 a 109 44 60 4899.5 ab 151 71 58 3903.1 a 136 55 75 5188.0 a CV 10.04 7.14 LSD 985.40 624.68 Prob. ** **
  30. 30. Conclusions There were only grain yield response to fertilizer but not to water regime No any effect of bentonite on rice yield in both first and second seasons TSN1 and TSN3 gave higher yield in Phanomxay district PNG1 and PNG5 gave greater yield in Hieng village but not in Nongmango village (PNG3) Post rice crops could increase farmers’ income and also shown some effect on rice yield in almost all locations Most of the sites of SSNM could not achieve yield target Low rice yield under GAP due farmers could not follow the 7 steps
  31. 31. Integration with other components Evaluation of rice variety use by farmers after the trial (Upland, lowland and flooded tolerance) and farmers’ income with socio- economic component Train PAFO and DAFO staff on experimental layout, data analysis, report writing and presentation skill with KS Demonstrate post-rice cropping systems, nutrient management on the integrated sites Conduct some experiment on water management with water component

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