Agronomic Performances of Rice Varieties at Different Transplanting Ages

Rice is the most important human food crop in the world. In Bangladesh rice is cultivated throughout the year as Aus, Aman and Boro. Among them boro rice is generally cultivated in November to March. More than half of the total production (55.5%) is obtained in this season. Generally, farmers use more than the recommended number of seedlings during transplanting. The number of seedlings plays a vital role in the growth, development and yield of rice. The aim of this experiment was to determine the number of seedling(s) during transplanting for boro rice varieties for higher growth and yield. This investigation was carried out at the research field of BINA sub-station under Khagrachari sadar upazila in Bangladesh during December 2017 to May 2018. The experiment tested three seedling numbers; S1 (Single), S2 (double), S3 (triple) and four varieties V1 (BRRI dhan-28), V2 (Binadhan-14), V3 (Heera-1), V4 (Shakti-2) in a factorial RCB design with three replications. Results revealed that significantly highest plant height was obtained with treatment S1´V3 (110.30 cm) and S3´V4 (109.4 cm) while the maximum number of tillers/hill from S3´V1 (16.93) and S2´V1 (16.07). In terms of production, treatment combination S3´V4 gave the highest grain (10.40 t/ha), straw (10.40 t/ha) and biological yield (10.40 t/ha). Harvest index was the highest in treatment S1´V4 (59.48). From the above findings it was observed that single seedling performed better than two and three seedlings per hill in terms of getting optimum yield of boro rice varieties. Hence, the rice growing farmers should avoid the use of extra seedlings during transplanting to save labor, time and money.

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“…Dejen [13] observed similar findings. [14] and Dey et al [15] who noticed that number of total tillers/hill differed among varieties.…”

Section: Total Number Of Tillers/hillmentioning

confidence: 99%

Effect of Variety and Seedling Number on the Growth and Yield of Boro Rice in Bangladesh

Chowhan¹,

Hoque

Ghosh³

et al. 2019

JEAI

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“…which was attributed to larger number of tiller production and greater ripening percentage. Working with irrigated rice under favorable ecosystems, many other workers [eg., 18,27,28,29] also suggested transplanting younger seedlings for minimizing transplanting shock, increasing productive tillers, number of spikelets and grain filling percentage. Contrasting results in our study might be explained from the difference in ecological conditions and varietal response to tidal flooding.…”

Section: Effect Of Seedling Agementioning

confidence: 99%

Improving Rice Yield in Tidal Floodplain: Optimizing Seedling Age and Transplanting Date

Hamid¹,

Ullah²,

Siddique³

et al. 2016

AFF

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Major constraint of growing rice in south central coastal region of Bangladesh is the tidal submergence of land and crops. Indigenous rice is generally grown in tidal floodplain harvesting poor yield. Transplanting seedlings of optimum age on appropriate date may potentially increase rice yield. We carried out on-farm trials for evaluating growth and yield performance of two indigenous rice varieties (Sadamota and Lalmota) and a high yielding variety (BRRI dhan 44) in response to variable seedling age and transplanting dates for two years. In the first year, 45 d and 60 d old seedlings of Sadamota were transplanted on a single date either in rows at 40 cm x 40 spacing or following farmers' traditional practice of random transplanting. The second year's trial compared the performance of one indigenous variety Lalmota and one modern variety BRRI dhan 44. Two age groups (45 d and 60 d) of seedlings of Lalmota and single age group (45 d) of BRRI dhan 44 were transplanted on two different dates (August 8 and August 24). First year's trial results indicated that irrespective of seedling age, transplanting in rows produced higher yield compared with farmers' traditional practice. In the second year's trial, late transplanting of 45 d old seedlings of both the varieties gave higher yield compared with early transplanting. BRRI dhan 44 produced significantly higher yield than Lalmota. Late transplanting of 60 d old seedlings of Lalmota produced higher yield than transplanting younger seedlings. Lower yield of earlier planted rice was associated with greater hill mortality and seedling damage, and production of relatively lesser number of tillers and panicles. For increasing yield in tidal floodplain, late planting (late August) with 60 d old seedlings of indigenous varieties in rows (40 cm x 40 cm) has been suggested.

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“…Around 82% of the total agricultural land in Bangladesh is occupied with rice production [2] . It creates the employment of 48% of the total labor force of the rural region and contributes to the livelihood of the people of Bangladesh [3] . The estimated per capita rice consumption of this country stretched about 166 kg year -1 [4] .…”

Section: Introductionmentioning

confidence: 99%

Impacts of different nitrogen forms and doses on agronomic performance of BRRI dhan29

Miah¹,

Mandal²,

Chowdhury³

et al. 2021

J Pharmacogn Phytochem

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Nitrogen (N) is one of the most important nutrients for rice cultivation and probably the hardest to maintain in soil. This experiment was conducted to investigate the impacts of different N forms and doses as urea on BRRI dhan29 during boro season in Meherpur district, Bangladesh. The two most abundant forms of urea namely granular urea (GU) and urea super granule (USG) were selected with five doses (0, 100, 150, 200, and 250 kg ha -1 ) for each form. The treatments were replicated thrice in Randomized Complete Block Design (RCBD). GU was broadcasted and USG was applied using deep placement method. Other fertilizers viz. triple super phosphate, muriate of potash, gypsum, and zinc sulfate were applied at 100, 70, 60, and 5 kg ha -1 , respectively. Agronomic parameters were measured by randomly selecting five hills from each plot. Application of N through USG significantly improved almost all agronomic characteristics such as plant height, total and effective tiller hill -1 , panicle length, total and filled grains panicle -1 , straw and biological yields, grain yield, and harvest index. BRRI dhan29 produced the highest grain and straw yields with the highest dose of USG application (250 kg ha -1 ). The 1000-seed weight was not significantly affected by N doses or by forms that might be due to its genetically controlled trait and environmental influence during the grain filling stage. Deep placement of USG ensured adequate N supply for a longer period that resulted in enhancement of growth and yield components of BRRI dhan29.

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Agronomic Performances of Rice Varieties at Different Transplanting Ages

Cited by 3 publications

References 1 publication

Effect of Variety and Seedling Number on the Growth and Yield of Boro Rice in Bangladesh

Effect of Variety and Seedling Number on the Growth and Yield of Boro Rice in Bangladesh

Improving Rice Yield in Tidal Floodplain: Optimizing Seedling Age and Transplanting Date

Impacts of different nitrogen forms and doses on agronomic performance of BRRI dhan29

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