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RICE RATOONING IN EASTERN INDIA 141Table 8. Effect of different fertilizer combinations and varieties on the growth and yield ofmain and ratoon rice crops, Kalyani, 1983-84.TreatmentGrainyield(kg/ha)1000- Duration (days)Panicles Grains//m 2 panicle grainwt (g) Vegetative Reproductive TotalMain crop (dry season)100 kg N/ha 3194.0100 kg N/ha, 22 kg 3757.0P/ha100 kg N/ha, 42 kg 3315.0K/ha100 kg N/ha, 22 kg 3936.0P/ha, 42 kg K/haSE ±119.3CD (0.05)413.7IR505314.0IR36 5073.0CR1014 1620.0Kumargore 2195.0SE ±73.8CD (0.05)215.3Ratoon crop (wet season)100 kg N/ha 1457.0100 kg N/ha, 22 1826.0kg P/ha100 kg N/ha, 1617.042 kg K/ha100 kg N/ha, 22 kg 1800.0P/ha, 42 kg K/haSE ±312.0CD (0.05)107.90IR501736.0IR361403.0CR1014 1737.0KumargoreSE ±CD (0.05)1679.0719.157.625 131324432714.148.741739919728413.238.427232527831918.2–31230229228811.4–748576912.37.9898390842.16.2627666743.2–514991873.49.919.9020.5619.9920.620.090.3121.7020.9314.9723.480.160.4618.5119.3618.5619.0493931131130.22–18.59 30 a18.37 30 a16.01 11022.49 1100.240.7160606060606060601531531731739090170170a Flowering began 30 d after main crop harvest; however, bulk harvesting was 90 d after maincrop harvest.YieldIn lowlands of West Bengal, two transplanted crops (one in the wet season and onein the dry) are usually grown. No crop is grown for the 2-3 mo (November-February)between the two rice crops. Ratooning provides the potential for another cropduring that short period.Yield and yield components in ratoons of HYVs were tested in the wet and dryseasons at Bidanchandra Krishi Viswa Vidyalaya. Short-duration varieties in wetseasonratoon yielded little and the late-maturing IR42 yielded nothing because ofthe low December temperature (Table 9). Yield components such as panicles per hilland filled grain wt were nearly equal to those of the wet season crop (2).CONCLUSIONRatooning rices in the semideep and deepwater areas has a potential for high yieldwith low cultivation cost. Further studies are needed on:
142 RICE RATOONINGTable 9. Grain yield and yield components of ratoon rice. aVarietyGrain yield Panicles Filled grains/ 1000-grain(t/ha) hill hill wt (g)WS DS WS DS WS DS WS DSIET2683IET1444IR579IR36IR42SE ±CD (0.05)0.20.20.20.2–90–0.30.40.40.40.5501503 73 76 77 94 40.4 0.81.2 2.322 (9)22 (9)19 (45)23 (57)39 (36)1.44.252 (71)35 (74)43 (79)41 (62)42 (57)3.49.922.821.020.421.421.40.61.920.120.520.020.821.70.72.0a WS = wet season, DS = dry season. Figures in parentheses are percentages offilled grain.• breeding and isolation of photoperiod-sensitive HYVs tolerant of lowtemperature in their vegetative and reproductive stages,• lodging resistance under fertilizer application,• cost-benefit ratio of supplemental irrigation to the ratoon crop, and• ratoon crop insect pests and diseases.REFERENCES CITED1. Bardhan Roy, S. K., B. S. Vergara, and G. Pateña. 1982. Rice with ratooning ability for deepwaterareas. Pages 305-309 in Proceedings of the international deepwater rice workshop. International RiceResearch Institute, P.O. Box 933, Manila, Philippines.2. Chatterjee, B. N., S. Bhattacharya, and P. Debnath. 1982. Ratooning of rice. Oryza 19(3,4):226-227.3. Chauhan, J. S., B. S. Vergara, and F. S. S. Lopez. 1985. Rice ratooning. IRRI Res. Pap. Ser. 102.19 p.4. Cuevas-Perez, P. E. 1980. Inheritance and association of six agronomic traits and stem-basecarbohydrate concentrations on ratooning ability in rice Oryza sativa L. Ph D thesis, Oregon StateUniversity.5. Prashar, C. R. K. 1970. Some factors governing rice-ratoons yield. Plant Soil 32(2):540-541.
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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
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42 RICE RATOONING1. Changes in till
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44 RICE RATOONINGTable 2. Character
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46 RICE RATOONING9. International R
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48 RICE RATOONINGplot size is 6 row
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50 RICE RATOONINGimproved ratooning
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52 RICE RATOONINGTable 6. Simple co
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Utilization of rice ratooningby far
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RICE RATOONING IN RIO DE JANEIRO 57
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RICE RATOONING IN RIO DE JANEIRO 59
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Rice ratooningin the Dominican Repu
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RICE RATOONING IN THE DOMINICAN REP
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89111306514772Special points Refere
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72 RICE RATOONINGANDHRA PRADESHBasu
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74 RICE RATOONINGrice observed at t
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76 RICE RATOONINGTAMIL NADUBalasubr
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78 RICE RATOONING19. Reddy, T.G., M
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80 RICE RATOONING1. Rice-growing re
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82 RICE RATOONING2. High cutting he
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84 RICE RATOONINGTable 3. Yield tri
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Rice ratoon crop managementin the h
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RICE RATOON CROP MANAGEMENT IN KARN
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Page 102: RICE RATOON CROP MANAGEMENT IN KARN
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
Page 146 and 147: RICE RATOONING IN EASTERN INDIA 139
Page 150 and 151: Ratooning in Bangladesh:prospects a
Page 152 and 153: RATOONING IN BANGLADESH 145RATOON C
Page 154 and 155: RATOONING IN BANGLADESH 147Table 4.
Page 156: RATOONING IN BANGLADESH 149OTHER FA
Page 159 and 160: 152 RICE RATOONINGTable 1. Hybrid s
Page 161 and 162: 154 RICE RATOONINGThe studies sugge
Page 163 and 164: 156 RICE RATOONINGVARIETIES AND CUL
Page 165 and 166: 158 RICE RATOONINGspikelet primordi
Page 167 and 168: 160 RICE RATOONINGTable 5. Effect o
Page 170 and 171: Agronomic principles and practiceso
Page 172 and 173: AGRONOMIC PRINCIPLES AND PRACTICES
Page 184 and 185: Rice ratooning: breeding,agronomic
Page 186 and 187: BREEDING, AGRONOMIC PRACTICES, AND
Page 192: BREEDING, AGRONOMIC PRACTICES, AND
Page 195 and 196: 188 RICE RATOONINGwas the most effe
Page 197 and 198: 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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