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Research Detail

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Md Nazmul Islam
Bangladesh Agricultural Development Corporation, Dhaka, Bangladesh

Mohammad Mobarak Hossain
Rice Breeding Platform, International Rice Research Institute, Metro Manila 1301, The Philippines

Mohammad Saiful Alam Sarker
Basic and Applied Research on Jute (BARJ) Project, Bangladesh Jute Research Institute, Noakhali, Bangladesh

Md Mahmudul Hasan Arif Sardar
Bangladesh Agricultural Development Corporation, Dhaka, Bangladesh

Md Iqbal Hossain
Bangladesh Agricultural Development Corporation, Dhaka, Bangladesh

Global warming and climate change are predicted to have a major impact on rice production, necessitating both adaption and mitigation strategies. Among the agricultural crops, rice is highly vulnerable to climatic extremes such as drought, unseasonal rains, flooding, and high-temperature stress. However, there is a dearth of short duration varieties which will fit well into the reduced growing period brought about by the changing climatic and rainfall pattern. With this point of view, a study was conducted at the research field of Bangladesh Agricultural Development Corporation (BADC) situated at Subarnachar sub-district under Noakhali district of Chittagong division in Bangladesh during July-November 2018 to sort out some cultivars for their earliness, adaptability, yield and other agronomic traits. Total 11 Kanihati cultivars viz., Kanihati 1, Kanihati 2, Kanihati 3, Kanihati 4, Kanihati 6, Kanihati 7, Kanihati 8, Kanihati 9, Kanihati 10, Kanihati 11 and Kanihati 12 were tested against the standard check BRRI dhan52. Test materials were arranged in a randomized complete block design with three replications in three blocks. Result reveals that Kanihati 9, Kanihati 7, and Kanihati 3 were qualified for further screening and evaluation processes for few more years as they were 20 days earlier having the yield potentials of statistically similar with BRRI dhan52.

  Climate change, Earliness, Global warming, Kanihati, Yield
  
  00-07-2018
  00-11-2018
  Crop-Soil-Water Management
  Rice

To test their performance having the shorter life cycle against standard check BRRI dhan52.

The experiment was conducted at the research field of the Bangladesh Agricultural Development Corporation (BADC) situated at Subarnachar sub-district under Noakhali district of Chittagong division in Bangladesh during July- November 2018. Geographically site was situated at 22.36°N and 91.12°E positions with an altitude of two meter above the sea level. The experiment site is situated on the Young Meghna Estuarine Floodplain of predominantly dark grey non- calcareous alluvium soils under the Subarnachar series (Brammer, 1996). It was a medium-high land under Coastal Saline Tract with the characteristics that have been presented. During the study period, July was the warmest month when the highest maximum and minimum temperature (33.7 and 26.50C, respectively) had recorded with about 84% relative humidity. Temperature declined gradually from September to November when November was the coolest month (maximum 30.7? and minimum 19.8?). Enough rainwater was available during the transplanting and early rice growth due to the highest rainfall in July (730 mm). Rainfall started to be declined with the month onward and reached nil in November. More cloudy sky prevailed during June and started to be clearer towards November and the November had the clearest sky having the highest sunshine hours. The test materials used for the experiment included 11 cultivars of traditional Kanihati rice viz., Kanihati 1, Kanihati 2, Kanihati 3, Kanihati 4, Kanihati 6, Kanihati 7, Kanihati 8, Kanihati 9, Kanihati 10, Kanihati 11, Kanihati 12. They were collected from BADC Farm, Itakhola, Habigonj, Bangladesh. The cultivars were tested against the standard check BRRI dhan52 for their earliness, adaptability, yield and other agronomic traits. The seed was sown in the nursery on 01 July 2018 on well prepared seedbed made by puddling with repeated ploughing followed by laddering. The main field was prepared by a two-wheel tractor. The land was prepared by four ploughings and cross ploughings then sun-drying for two days, followed by inundation and laddering. The seedlings of 21 days aged were transplanted on 20 July 2018, allocating three seedlings hill-1  at a spacing of 25 cm ×15 cm. Each plot of 10 m × 4 m size was arranged in a RCBD design replicated three times. The land was fertilized with phosphorus, potassium, sulfur, and zinc @ 25, 40, 15, and 2.0 kg ha-1 as triple superphosphate, muriate of potash, gypsum, and zinc sulfate, respectively at final ploughing. Nitrogen was applied @ 80 kg ha-1 as urea in three equal splits at 25, 45, and 60 DAT. The weedicide, Butachlor was used to control weeds such as grasses and sedges, and it was applied with 1.5 kg active ingredient ha-1 at three DAT. In addition to chemical control of weeds, one hand weeding was done at 25 DAT, and irrigation was applied as and when required. Adequate plant protection measures were taken as per the recommendation of the BRRI (2017). The crop was harvested at maturity (when 80% of grain became golden yellow) on different dates of respective cultivars, from the 3 m × 1 m central area of each plot. The varieties were evaluated for earliness and their potential through the measurement of basic agronomic traits. Thus, crop performance data gathered from the experiment included (1) days to 50% flowering as a measure for maturity duration, (2) plant height, (3) number of productive tillers, (4) length of panicle, (5) number of grains panicle-1, (7) weight of 1000 grains and (8) grain yield. The weight of 1000 grains and grain yield was calculated at 14% moisture content using the following formula (USDA, 1979) and converted to t ha-1.

  Res. Agric. Livest. Fish. Vol. 7, No. 3, December 2020: 393-402.
  DOI: https://doi.org/10.3329/ralf.v7i3.51358
Funding Source:
1.   Budget:  
  

In this study, Kanihati 9, Kanihati 7 and Kanihati 3 cultivars were assessed to have performed well. Based on the evaluation result, these cultivars have qualified for further screening and evaluation processes for few more years they have an earliness of fewer than 140 days with a preferred grain yield of greater than 4 t ha-1.

 

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