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N FERTILIZER MANAGEMENT FOR MAXIMUM RATOON YIELDS 193Table 5. Lemont ratoon crop yield as influenced by N applied immediately aftermain crop harvest at Beaumont, Texas.Main cropN appliedAverage ratoon crop yield (t/ha),postflood after main crop1984 and 1985N timing a harvest (kg/ha) Low main crop N High main crop NNo applicationPDPD and HdHdHd20561120561120561120561120561121.92.62.81.72.52.72.02.53.12.22.93.52.42.93.31.72.32.91.82.22.62.22.53.22.12.82.92.22.73.1LSD (.05) = 0.25a PD = panicle differentiation. Hd = heading, Hd2 = 2 wk after initial heading.rice yields. Data suggest that N application at main crop PD followed by Napplications near main crop heading would increase total yields of certain varieties.However, additional experiments will be required to verify this.Applying one-half or all of the postflood N at heading or 2 wk after headingrather than at PD provided earlier ratoon crop tillering and 7-10 d earlier ratooncrop maturity.Nitrogen fertilizer applied immediately after main crop harvest has a moreevident and positive influence on ratoon crop yields than N applied before main cropharvest.REFERENCES CITED1. Bahar, F. A., and S. K. De Datta. 1977. Prospects of increasing tropical rice production throughratooning. Agron. J. 69:536-540.2. Chauhan, J. S., B. S. Vergara, and F. S. S. Lopez. 1985. Rice ratooning. IRRl Res. Pap. Ser. 102.19 p.3. Dat, T. V., and M. L. Peterson. 1983. Performance of near-isogenic genotypes of rice differing ingrowth duration. II. Carbohydrate partitioning during grain filling. Crop Sci. 23:243-246.4. Evatt, N. S. 1958. Stubble rice production tests 1956-57. Prog. Rep. 2018, Texas Agric. Exp. Stn.,Texas A&M Univ., College Station, Texas.5. Hsieh, C. F., C. Y. Lin, and T. S. Lai. 1983. Effects of nitrogen fertilizer and delaying harvest on therecovery rate of ratoon rice. Bull. Taichung Dist. Agric. Imp. Stn. 7:38-44.6. Ichii, M. 1984. Studies on the utility of ratoon traits of rice as the indicator of agronomic characters inbreeding. Mem. Fac. Agric., Kagawa Univ., No. 44. 49 p.7. Mengel, D. B., and F. E. Wilson. 1981. Water management and nitrogen fertilization of ratoon croprice. Agron. J. 73:1008-1010.8. Murata, Y., and S. Matsushima. 1975. Rice. Pages 73-99 in Crop physiology. L. T. Evans, ed.Cambridge Univ. Press, United Kingdom.
194 RICE RATOONING9. Rister, M. E., and R. C. Griffin. 1984. Selected economic analyses of second crop rice production andwater costs — Liberty and Chambers counties. Dept. Agric. Econ. Staff Pap. Ser. Dep. Inf. Rep.DIR84-1, SP-1. Texas Agric. Exp. Stn., Texas A&M Univ., College Station, Texas.10. Stansel, J. W. 1975. Effective utilization of sunlight. In Six decades of rice research in Texas. Res.Monogr. 4. Texas A&M University System.11. Wells, B. R., and F. T. Turner. 1984. Nitrogen use in flooded rice soils. Pages 349-362 in Nitrogen incrop production. R. D. Hauck, ed. Am. Soc. Agron. Madison, Wisconsin.12. Yoshida, S., and S. B. Ahn. 1968. The accumulation process of carbohydrate in rice varieties inrelation to their response to nitrogen in the tropics. Soil Sci. Plant Nutr. 14(4):153-161.
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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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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
Page 199: 192 RICE RATOONINGRatoon tiller reg
Page 203 and 204: 196 RICE RATOONINGExcept for rice w
Page 205 and 206: 198 RICE RATOONINGInsect survivorsh
Page 207 and 208: 200 RICE RATOONING1. Stem borer occ
Page 209 and 210: 202 RICE RATOONING3. Population dyn
Page 211 and 212: 204 RICE RATOONING2, 3). Microvelia
Page 213 and 214: 206 RICE RATOONINGplant chemicals a
Page 215 and 216: 208 RICE RATOONING17. Krishnamurthy
Page 217 and 218: 210 RICE RATOONING1. Yellow dwarf c
Page 219 and 220: 212 RICE RATOONING3. The effect of
Page 221 and 222: 214 RICE RATOONINGAlthough the inte
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
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INHERITANCE OF RATOONING ABILITY IN
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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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