RICE RATOONING - IRRI books - International Rice Research Institute

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Screening rice genotypesfor ratooning abilityin the Tungabhadra River Projectof KarnatakaK. S. Prakash and B. G. PrakashAgricultural <strong>Research</strong> Station, University of Agricultural Sciences, 583121,India.In the Tungabhadra River Project, farmers prefer rice cultivars with good grainquality (good grain appearance, short and slender grains, and high milling recovery),responsiveness to high rates of chemical fertilizers, and resistance to insect pests anddiseases. Many recommended and unrecommended rice cultivars are cultivated.The major portion of the area in autumn is occupied by Sona Mahsuri, a latematuring(150-160 d) genotype. In summer, farmers prefer Tellahamsa, a mediummaturing(135-140 d) variety with long, slender grains. Both are, however,susceptible to brown planthopper, so we are trying to replace them with tolerantgenotypes of comparable grain quality.EVALUATING GENOTYPES FOR <strong>RATOONING</strong> ABILITYMany genotypic differences in ratooning ability have been reported and weresummarized by Chauhan et al (1). However, we felt a need to evaluate genotypes fortheir main crop performance and ratooning ability in the Tungabhadra project area.Main cropTwenty-two promising rice genotypes belonging to medium- and late-maturitygroups were planted in demonstration plots in autumn, 1985. Spacing was 20 cmbetween rows and 15 cm between plants. Fertilizer was applied to the main crop atthe rate of 100 kg N, 22 kg P, and 42 kg K/ha. Days to flowering varied from 98 to135 d. Autumn yields among genotypes varied greatly, but were comparativelylower than summer yields because of brown planthopper incidence and bacterial leafblight.Ratoon cropThe main crop was cut 15 cm above ground. Nitrogen at 50 kg/ ha and P at 18 kg/ hawere applied. The number of regenerated tillers was highest in cultivars that had highmain crop yields. Genotypes ratooned irrespective of their main crop floweringduration.
0.180.200.490.250.160.270.390.350.330.250.350.460.250.260.290.250.370.170.400.300.200.250.43Table 1. Observations of main and ratoon crops of 23 rice genotypes, Tungabhadra River Project, Karnataka.Main crop Ratoon crop aRegene-Stem Shoot Root Shoot Root1000-Genotype Tillers/ Days to 50% Yield rated Ratoongirth wt (g) wt (g) wt (g) wt (g) Days to Ratoon Yield grain %plant flowering (t/ha) tillers vigor b (cm) 1 MAR 1 MAR 2 MAR 2 MAR flowering ht(cm) (t/ha) wt(g) germination HI(no.)IR509.699 2.02 13.4 5 0.32 4.981.38 7.30 0.90 46(46.5)lR308649.699 3.83 17.80 5 0.32 3.26 0.34 8.30 1.40 51(51.5)PUSHPA 11.299 3.15 16.20 9 0.40 2.20 0.32 8.15 1.60 50(50.5)IET7575 11.0 118 2.52 14.40 5 0.43 8.04 2.08 10.45 1.40 51(42.2)KNS5914 18.2 135 3.38 14.20 1 0.40 5.04 1.86 8.90 1.50 49(36.3)PUSA-150 11.6 102 3.23 16.00 9 0.38 6.84 3.04 6.90 2.55 51(50.0)BPT-2685 13.0120 2.26 16.2 1 0.38 10.04 8.70 16.05 8.30 53(44.2)IET-8110 15.21212.94 17.61 0.40 11.30 4.20 9.00 4.90 52(43.0)IET-8101 10.41172.94 19.8 5 0.40 15.15 9.35 17.75 12.25 51(43.6)IET-8114 11.01024.73 24.2 1 0.33 7.40 5.50 13.75 6.90 53(53.0)IET-7431 11.01233.55 23.2 1 0.36 8.36 3.65 12.25 3.15 54(43.9)IET-6463 14.41192.85 24.4 5 0.40 12.80 6.35 17.75 8.10 50(42.0)IET-6211 14.0 1253.39 20.0 5 0.45 11.35 3.05 14.50 3.25 51(40.8)IET-7297 11.61252.66 26.41 0.44 13.65 14.10 19.50 12.95 48(38.4)ET-7300 16.0 1243.23 27.0 1 0.43 10.70 6.00 17.50 7.20 51(41.1)ET-7999 10.21162.65 25.01 0.42 17.15 4.50 18.5 5.75 47(40.5)IET-8004 10.61144.62 28.6 1 0.41 17.40 6.60 21.05 3.60 45(39.5)IR5416.5 99 4.03 23.2 5 0.47 6.10 2.95 7.95 3.50 51(51.5)ET-8614 17.6 114 3.06 26.01 0.42 11.75 6.80 12.55 7.10 45(39.5)BPT-5204 21.2 120 3.83 17.31 0.44 7.40 1.05 7.57 2.25 51(42.5)S-927122.4112 4.54 18.8 1 0.44 16.10 5.75 15.85 2.00 51(45.5)RNR-52147 19.6113 3.94 18.4 1 0.44 10.75 3.10 12.65 2.15 52(43.7)BPT-2226 20.4114 3.51 30.2 1 0.42 11.75 6.00 13.30 4.40 45(38.5)a MAR = months after ratooning, HI = harvest index. Figures in parentheses are % of main crop.b 1 = Very good, 5 = medium, 9 = low.58.266.066.069.872.472.461.270.254.268.674.266.249.871.269.663.470.065.049.065.562.465.657.60.29(14.36)0.54(14.09)0.10( 3.17)0.32(12.70)0.47(13.90)0.70(21.67)1.61 (71.24)1.50(52.04)1.23(41.83)0.94(19.87)1.81(50.99)1.53(53.68)1.07(31.56)1.37(51.50)0.65(20.12)1.48(55.84)0.75(16.23)0.52(12.90)0.80(29.41)1.01(26.37)0.89(19.60)1.13(28.68)1.56(45.67)17.118.117.519.413.017.217.219.520.521.422.420.024.320.420.820.016.013.613.615.624.017.615.05832536548187949384825378685471732877556678789
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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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23123722821721922222421423122421722
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98 RICE RATOONING1. The Tungabhadra
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100 RICE RATOONINGthe results of po
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102 RICE RATOONINGTable 4. Effect o
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Ratoon rice researchin Karnataka, I
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RATOON RICE RESEARCH IN KARNATAKA 1
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RATOON RICE RESEARCH IN KARNATAKA 1
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112 RICE RATOONINGTable 1. Area and
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114 RICE RATOONINGonly 7.5-49.7% of
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116 RICE RATOONINGTable 5. Relation
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Scope for rice ratoon croppingin th
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RATOON CROPPING IN NORTHEASTERN IND
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Scope for rice ratoon croppingin th
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RATOON CROPPING IN CENTRAL AND NORT
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RATOON CROPPING IN CENTRAL AND NORT
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Potential of rice ratooningin Madag
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RICE RATOONING IN MADAGASCAR 131a.
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RICE RATOONING IN MADAGASCAR 133Tab
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Potential for rice ratooningin east
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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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Page 223 and 224: 216 RICE RATOONINGTable 6. Sheath b
Page 226 and 227: Yellow dwarf disease in ratoon rice
Page 228 and 229: YELLOW DWARF DISEASE IN RATOON RICE
Page 230 and 231: YELLOW DWARF DISEASE IN RATOON RICE
Page 232: YELLOW DWARF DISEASE IN RATOON RICE
Page 235 and 236: 228 RICE RATOONINGTable 1. Estimate
Page 237 and 238: Main crop a Ratoon crop b53.956.155
Page 240 and 241: Disease and insect pestsand their c
Page 242 and 243: DISEASE AND INSECT PESTS IN RICE RA
Page 244 and 245: DISEASE AND INSECT PESTS IN RICE RA
Page 246 and 247: Inheritance of ratooning abilityin
Page 248 and 249: INHERITANCE OF RATOONING ABILITY IN
Page 250 and 251: INHERITANCE OF RATOONING ABILITY IN
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Page 255 and 256: 248 RICE RATOONINGShould the season
Page 257 and 258: 250 RICE RATOONINGYield and yield-c
Page 259 and 260: 252 RICE RATOONINGMain-crop photosy
Page 261 and 262: 254 RICE RATOONINGShort-termGiven t
Page 264 and 265: Commercial ratoon rice productionin
Page 266 and 267: COMMERCIAL RATOON RICE PRODUCTION I
Page 268 and 269: COMMERCIAL RATOON RICE PRODUCTION I
Page 270: COMMERCIAL RATOON RICE PRODUCTION I
Page 275 and 276: 268 RICE RATOONING1. Path analysis
Page 277 and 278: 270 RICE RATOONINGRecommendationsVa
Page 280 and 281: ParticipantsT. AhmedRice Experiment
Page 282 and 283: Varietal indexA200, 221Achra 108/1,
Page 284 and 285: VARIETAL INDEX 277IR2061-465-1, 12I
Page 286: VARIETAL INDEX 279RU7502006, 49, 51
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