Correlation-regression Estimation for Phenology, Growth Yield and Agrometeorological Indices of T-aman Rice Influenced by Different Transplanting Dates and Varieties
Year: 2024
Type: article
Abstract: Rice (Oryza sativa L.) is the most popular staple food grain of Bangladesh. Its cultivation was influenced by various practices and agrometeorological indices. A field experiment was conducted at research field of the Department of Environmental Science, Bangladesh Agricultural University (BAU), Mymensingh during the period of Aman season, 2022 to assess phenology and growth yield of different rice varieties as influenced by agrometeorological indices i.e., accumulated growing degree days (GDD), helio thermal units (HTU), Photothermal units (PTU), & heat use efficiency (HUE) and various planting dates. The experiment included two factors viz., rice varieties (BRRI dhan-49 (V1), BRRI dhan-87 (V2), & Dhanigold (V3) and transplanting dates (15th July (D1), 30th July (D2), 15th August(D3), and 30th August-D4) were conducted in a randomized complete block design (RCBD) with three replications. The results of present study revealed that variety, V3 resulted in higher values for all yield attributes (plant height, leaf area index, number of tillers per hill, grain yield and biological yield) and thermal use efficacy (HUE, HTUE, HyTUE) as well as lowest in Growing Degree Days (GDD), Helio Thermal Unit (HTU) and Hydrothermal Unit (HyTU) than others tested varieties (V1 & V2). Interestingly, similar trend of results was found in transplanting dates D3. In the case of combined effect, V3×D3 was the best performance for morpho-physiological, yield traits and thermal use efficacy compared to others and returned higher yield (4.60 t/ha) while V1×D1 showed the lowest values for all parameters as well as returned minimum yield (2.13 t/ha). The results of correlation co-efficient revealed that grain yield and biological yield was significantly and positively correlated with straw yield, biological yield, and thermal use efficacy but it was a very weakly negative correlated with GDD, HTU and HyTU. Based on the results of this research, therefore, it may be concluded that to obtain a higher yield of rice through the proper use of agrometeorological indices as influenced by different varieties and transplanting dates, it should be implemented Dhanigold variety (V3) and transplanting dates on 15th August (D3).
Source: Tropical Agrobiodiversity
Authors: Md. Tauhid Hossain, Md. Shahadat Hossen, Kamrun Nahar, Md. Mahadi Hasan, Ashrafi Akter, Md. Jewel Alam
Institution: Bangladesh Agricultural University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W4407865299