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Research Detail

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A A Choudhury
Agronomy Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

S B Siddique,
Agronomy Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

K U Ahmed,
Agronomy Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

M A Mannan,
Agronomy Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

M A Mazid
Agronomy Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

M A Jabbar
Agronomy Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

During T. Aman season splitting of 2-3 tillers per hill did not reduce grain yield of mother plant and replantation of 2-3 tillers after splitting from the mother plant performed well in respect of grain yield. Depending on the soil fertility and genetic potentiality of the variety (BR11) about 4­8 times new area can be covered by the splitted tillers from a unit area of mother crop. Growth duration of the test variety increased by 3-12 days due to splitting of tillers.

 

  Splitted, Tillers Grain Yield, T. Aman Rice
  BRRI Gazipur-1701
  01-06-1988
  31-12-1990
  Crop-Soil-Water Management
  Rice

Splitting tillers is not a new technique in Bangladesh. But a little information is available on splitting tillers of modem rice varieties. Therefore, field studies were conducted to investigate the effect of tiller splitting on mother hill along with the area coverage and grain yield from splitted tillers in T. Aman rice.

Four field trials were conducted at the Bangladesh Rice Research Institute, Gazipur and Comilla from 1988 to 1990 during T. Aman season. The soil of the experimental fields were clay loam in Gazipur and silty clay loam in Comilla. Thirty-day-old seedlings were transplanted at 2-3 seedlings per hill. At 40 DAT tillers from the mother plants were splitted and replanted in a new area on the same day. First three trials were carried out to evaluate the effect of splitted tillers on the grain yield of rice. In these trials, there were six treatments such as 0, 1, 2, 3, 4 and 5 tillers per hill, separated manually from the mother plant and replanted in a new area using the same number of tillers per hill on the same day. The test variety was BR11. The experiments were conducted in randomized complete block design with four replications. The unit plot size was 4- x 4-m.The fourth and final trial was conducted to determine the area coverage by splitted tillers. Two tillers were kept intact and the remaining tillers were separated from the mother hill. Then the splitted tillers were retransplanted at two tillers per hill and the area covered by the splitted tillers was measured. For comparing yield another treatment was with intact hill.

Fertilizers were applied at the rate of 60­40-40-10-4 kg/ha of N, P205, K20, S and Zn as urea, triple superphosphate, muriate of potash, gypsum and zinc sulphate in all the trials. All PKS and Zn were applied as basal doses. Urea was applied in 3 equal splits; at 15. days after transplanted (DT), at the maximum tillering stage and five days before panicle initiation stage. Grain yield was recorded from 10 m2 area from each plot, leaving the border hill and adjusted at 14% moisture content. The data were analysed following standard statistical procedures and DMRT were done.

  Bangladesh Rice j. 6(1&2) : 59-61, 1995
  
Funding Source:
1.  Government Budget:  60,000/-
   60,000/-

From the present experiments it was found that at least 2 tillers could be separated form the mother hill without affecting the yield. However, the total yield both from mother hill and splitted tillers was considering higher than the intact hill. In case of 5 splitted tillers the total yield is almost double than the original intact hill. Transplantation of splitted tillers delayed maturity of rice to about 3-12 days in general.

 

 

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