RICE RATOONING - IRRI books - International Rice Research Institute

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2312372282172192222242142312242172222172135.53.05.76.96.53.02.91.53.77.14.83.11.75.023.812.725.031.729.113.612.96.916.032.121.913.87.723.632. IR19362-6233. C 23-3-134. IR10167-87-3-335. lR10198-21-1-336. Karekagga 7837. IR7682-135-3-2-2-238. lR13047-76-139. Gulfrose40. Milbumum41. RPKN 242. lR10167-129-3-443. IR5857-4-IE-644. lR8460-180-2-1-345. IR9940-11-2-370787075888372708585738767461401441411391421411411311511411401411291295.12.65.46.56.32.72.71.23.36.84.32.51.44.9657560756570606075757580604591938778778183838083778187840.40.40.20.40.20.40.20.20.40.30.50.50.20.2
94 RICE RATOONINGTable 7. Combined performance of main and ratoon crops of 25 genotypes at the RegionalResearch Station, Mudigere, 1980-81 kharif and rabi.Main crop Ratoon crop CombinedEntryDays to Grain Days to Grain Days to Grain Per day grainmaturity yield maturity yield maturity yield production(t/ha) (t/ha) (t/ha) (kg/ha)IR9209-48-3-2lR9758-150-3lR9129-393-2-6-2-2lR9209-217-1-2-2lR9752-71-3-2lR9761-40-3-2IR15324-117-2-2-3lntan (UAS)lR9782-111-2-1-2IR9846-23-2lR9129-209-2-2-2-3IR9129-457-2-2-1-2IR9224-223-2-2-2-1IR9224-22-2-2-2-3IR9698-16-3-3-2IR13423-71-2-2lR9852-19-2IR36lntan (IRRI)MingoloIR17525-8-12-3-3-2lR23057-247-2-2-3IR8608-76-3-2lR9814-14-3lR8608-75-3-1-31631531631531511601631691511471631491551541521551531571551621591561601591583.73.02.44.53.26.35.56.13.95.44.63.65.15.65.84.75.04.94.66.15.85.46.15.55.2877677808881931288278818488788186838012611780838077850.60.40.50.60.50.60.53.70.30.50.50.40.50.60.40.70.40.63.22.91.00.40.40.40.22502292402332392412562972332252442332432322332412362372812792392392402362434.33.42.95.23.76.96.09.84.15.95.04.15.66.26.25.45.45.57.99.06.85.86.65.85.417.014.812.222.115.328.823.533.017.726.320.617.523.026.826.922.122.823.228.032.328.524.127.424.822.3attractive yields (Table 6, 7) because they flowered after winter. Also, because theflowering of ratoon crops coincided with that of early-sown (early-maturing)summer crops, bird damage was minimized.The cultivars IR9209-217-1-2-2, IR9761-40-3-2, IR15324-117-2-2-3, Intan(UAS), IR9846-23-2, IR9224-223-2-2-1, IRI9224-22-2-2-2-3, IR13423-71-2-2,IR9852-19-2, IR36, Intan (IRRI), Mingolo, IRI 7525-8-12-3-3-2, and IR23057-247-2-2-3 could be tried under delayed planting, since their low ratoon yields were due tocold and bird damage. This would reveal whether ratooning with these cultivars ispracticable and economical.Advantages of ratoon croppingThe cost of cultivation for the ratoon crop is considerably lower than that of sowinga second crop, because of reduced labor costs for land preparation and transplanting.Also, the land, otherwise idle during January-May, is profitably used and thereforethe cost per unit production should be cheaper. The rice straw also has substantialvalue in the hilly region and is an additional point in favor of ratoon cropping.The likely area to be covered under this system in the hilly region of Karnatakais estimated at 50,000 ha. However, because the system is new, studies are needed todetermine suitable varieties, planting time, and management practices for the mainand the ratoon crops.
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RICERATOONING1988INTERNATIONAL RICE
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ContentsForewordWelcome 1OverviewRi
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Genetics and varietal improvementIn
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2 RICE RATOONINGthe main crop. Harv
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4 RICE RATOONINGTable 1. Area, prod
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6 RICE RATOONINGTable 2. Rice varie
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8 RICE RATOONING1. Effect of spacin
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10 RICE RATOONINGHowever, no signif
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12 RICE RATOONINGrelating to seed v
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14 RICE RATOONING5. Cultivars that
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Economic perspectivesof rice ratoon
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ECONOMIC PERSPECTIVES OF RICE RATOO
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32 RICE RATOONINGla) Developmental
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34 RICE RATOONINGCutting heightStub
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36 RICE RATOONINGEarly flooding enc
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38 RICE RATOONING2. Factors affecti
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40 RICE RATOONING27. Nair, N.R., an
Page 49 and 50: 42 RICE RATOONING1. Changes in till
Page 51 and 52: 44 RICE RATOONINGTable 2. Character
Page 53 and 54: 46 RICE RATOONING9. International R
Page 55 and 56: 48 RICE RATOONINGplot size is 6 row
Page 57 and 58: 50 RICE RATOONINGimproved ratooning
Page 59 and 60: 52 RICE RATOONINGTable 6. Simple co
Page 62 and 63: Utilization of rice ratooningby far
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Page 68 and 69: Rice ratooningin the Dominican Repu
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Page 77 and 78: 89111306514772Special points Refere
Page 79 and 80: 72 RICE RATOONINGANDHRA PRADESHBasu
Page 81 and 82: 74 RICE RATOONINGrice observed at t
Page 83 and 84: 76 RICE RATOONINGTAMIL NADUBalasubr
Page 85 and 86: 78 RICE RATOONING19. Reddy, T.G., M
Page 87 and 88: 80 RICE RATOONING1. Rice-growing re
Page 89 and 90: 82 RICE RATOONING2. High cutting he
Page 91 and 92: 84 RICE RATOONINGTable 3. Yield tri
Page 94 and 95: Rice ratoon crop managementin the h
Page 96 and 97: RICE RATOON CROP MANAGEMENT IN KARN
Page 98 and 99: RICE RATOON CROP MANAGEMENT IN KARN
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Page 105 and 106: 98 RICE RATOONING1. The Tungabhadra
Page 107 and 108: 100 RICE RATOONINGthe results of po
Page 109 and 110: 102 RICE RATOONINGTable 4. Effect o
Page 112 and 113: Ratoon rice researchin Karnataka, I
Page 114 and 115: RATOON RICE RESEARCH IN KARNATAKA 1
Page 116: RATOON RICE RESEARCH IN KARNATAKA 1
Page 119 and 120: 112 RICE RATOONINGTable 1. Area and
Page 121 and 122: 114 RICE RATOONINGonly 7.5-49.7% of
Page 123 and 124: 116 RICE RATOONINGTable 5. Relation
Page 126 and 127: Scope for rice ratoon croppingin th
Page 128 and 129: RATOON CROPPING IN NORTHEASTERN IND
Page 130 and 131: Scope for rice ratoon croppingin th
Page 132 and 133: RATOON CROPPING IN CENTRAL AND NORT
Page 134 and 135: RATOON CROPPING IN CENTRAL AND NORT
Page 136 and 137: Potential of rice ratooningin Madag
Page 138 and 139: RICE RATOONING IN MADAGASCAR 131a.
Page 140 and 141: RICE RATOONING IN MADAGASCAR 133Tab
Page 142 and 143: Potential for rice ratooningin east
Page 144 and 145: RICE RATOONING IN EASTERN INDIA 137
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Ratooning in Bangladesh:prospects a
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RATOONING IN BANGLADESH 145RATOON C
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RATOONING IN BANGLADESH 147Table 4.
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RATOONING IN BANGLADESH 149OTHER FA
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152 RICE RATOONINGTable 1. Hybrid s
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154 RICE RATOONINGThe studies sugge
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156 RICE RATOONINGVARIETIES AND CUL
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158 RICE RATOONINGspikelet primordi
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160 RICE RATOONINGTable 5. Effect o
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Agronomic principles and practiceso
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AGRONOMIC PRINCIPLES AND PRACTICES
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Rice ratooning: breeding,agronomic
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BREEDING, AGRONOMIC PRACTICES, AND
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188 RICE RATOONINGwas the most effe
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190 RICE RATOONINGRESULTSMain crop
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192 RICE RATOONINGRatoon tiller reg
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194 RICE RATOONING9. Rister, M. E.,
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196 RICE RATOONINGExcept for rice w
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198 RICE RATOONINGInsect survivorsh
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200 RICE RATOONING1. Stem borer occ
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202 RICE RATOONING3. Population dyn
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204 RICE RATOONING2, 3). Microvelia
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206 RICE RATOONINGplant chemicals a
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208 RICE RATOONING17. Krishnamurthy
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210 RICE RATOONING1. Yellow dwarf c
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212 RICE RATOONING3. The effect of
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214 RICE RATOONINGAlthough the inte
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216 RICE RATOONINGTable 6. Sheath b
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Yellow dwarf disease in ratoon rice
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YELLOW DWARF DISEASE IN RATOON RICE
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228 RICE RATOONINGTable 1. Estimate
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Main crop a Ratoon crop b53.956.155
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Disease and insect pestsand their c
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DISEASE AND INSECT PESTS IN RICE RA
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DISEASE AND INSECT PESTS IN RICE RA
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Inheritance of ratooning abilityin
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INHERITANCE OF RATOONING ABILITY IN
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248 RICE RATOONINGShould the season
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250 RICE RATOONINGYield and yield-c
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252 RICE RATOONINGMain-crop photosy
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254 RICE RATOONINGShort-termGiven t
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Commercial ratoon rice productionin
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COMMERCIAL RATOON RICE PRODUCTION I
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0.180.200.490.250.160.270.390.350.3
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268 RICE RATOONING1. Path analysis
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270 RICE RATOONINGRecommendationsVa
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ParticipantsT. AhmedRice Experiment
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Varietal indexA200, 221Achra 108/1,
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VARIETAL INDEX 277IR2061-465-1, 12I
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VARIETAL INDEX 279RU7502006, 49, 51
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