Rice Response to Nitrogen in Tidal Flooded Non-saline Soil

Islam, Saidul; Khatun, Amina; Rahman, F. H.; Hossain, Atms; Naher, Umme Aminun; Saleque, M. A.

doi:10.3329/brj.v19i2.28166

Cited by 10 publications

(5 citation statements)

References 20 publications

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“…In Boro season, most of the AE N values were above the Doberman standard with different N rates, while in T. Aman season, the AE N values of BRRI dhan75 were below the standard (Table 5). Islam et al (2015) reported 16-36 kg kg −1 AE N in Boro rice, while Hussain et al (2016) found AE N between 0.52 and 17 kg kg −1 in T. Aman rice which supports our results. Our study also indicates that AE N decreased with the increase of N inputs.…”

Section: Nitrogen Uptake and Use Efficiencysupporting

confidence: 91%

Nitrogen response of two high yielding rice varieties as influenced by nitrogen levels and growing seasons

Jahan

Islam

Sarkar

et al. 2020

Geology, Ecology, and Landscapes

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Proper nitrogen (N) management of high yielding rice varieties is crucial for obtaining their potential yield benefit. In this study, we compared the effect of different N rates on rice growth, yield, and N use efficiency of two high yielding rice varieties (BRRI dhan58 and BRRI dhan75) in a Boro (dry season)-fallow-T. Aman (wet season) cropping pattern. The N rates were: 0, 25, 50, 75, 100, 125, 150 and 175 kg ha −1 which were assigned in randomized complete block design with three replications. In Boro season, BRRI dhan58 showed higher response to applied N compared to BRRI dhan75 in T. Aman season. The calculated optimum N dose to maximize yield of BRRI dhan58 and BRRI dhan75 were 142 kg ha −1 and 82 kg ha −1 , respectively. The agronomic N use efficiency and fertilizer N recovery efficiency were comparatively higher in BRRI dhan58 grown in Boro season than BRRI dhan75 grown in T. Aman season, while in both seasons, the N use efficiencies decreased with increased N rates. This study results suggest that variety-specific N fertilization with respect to growing season is the best N management practice to maximize rice yield avoiding the excess use of N fertilizer.

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Section: Nitrogen Uptake and Use Efficiencysupporting

confidence: 91%

Nitrogen response of two high yielding rice varieties as influenced by nitrogen levels and growing seasons

Jahan

Islam

Sarkar

et al. 2020

Geology, Ecology, and Landscapes

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“…PE also decreased with increasing N application over N100 and showed that yield increased per kilogram N accumulated in rice plant was decreased with increasing N application greater than N100. AE was 16–36 in Boro rice ( Islam et al., 2015 ) and 0.52–17 in T. Aman rice ( Hussain et al., 2016 ). AE significantly increased with increasing N levels up to 165 kg N ha −1 and decreased with further uplift in N application in some recently released Egyptian rice varieties ( Ghoneim and Osman, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Promising physiological traits associated with nitrogen use efficiency in rice under reduced N application

Srikanth,

Subrahmanyam,

Sanjeeva Rao

et al. 2023

Front. Plant Sci.

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Higher grain yield in high-yielding rice varieties is mostly driven by nitrogen (N) fertilizer applied in abundant amounts leading to increased production cost and environmental pollution. This has fueled the studies on nitrogen use efficiency (NUE) to decrease the N fertilizer application in rice to the possible extent. NUE is a complex physiological trait controlled by multiple genes, but yet to be completely deciphered in rice. With an objective of identifying the promising physiological traits associated with NUE in rice, the performance of 14 rice genotypes was assessed at N0, N50, N100, and N150 for four (two wet and two dry) seasons using agro-morphological, grain yield, flag leaf traits, photosynthetic pigment content, flag leaf gas exchange traits, and chlorophyll fluorescence traits. Furthermore, the data were used to derive various NUE indices to identify the most appropriate indices useful to screen rice genotypes at N50. Results indicate that with the increase in N application, cumulative grain yield increased significantly up to N100 (5.02 t ha−1); however, the increment in grain yield was marginal at N150 (5.09 t ha−1). The mean reduction of grain yield was only 26.66% at N50 ranging from 15.0% to 34.2%. The significant finding of the study is the identification of flag leaf chlorophyll fluorescence traits (Fv/Fm, ΦPSII, ETR, and qP) and Ci associated with grain yield under N50, which can be used to screen N use efficient genotypes in rice under reduced N application. Out of nine NUE indices assessed, NUpE, NUtE, and NUEyield were able to delineate the high-yielding genotypes at N50 and were useful to screen rice under reduced N conditions. Birupa emerged as one of the high yielders under N50, even though it is a moderate yielder at N100 and infers the possibility of cultivating some of the released rice varieties under reduced N inputs. The study indicates the possibility of the existence of promising genetic variability for grain yield under reduced N, the potential of flag leaf chlorophyll fluorescence, and gas exchange traits as physiological markers and best suitable NUE indices to be deployed in rice breeding programs.

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“…Yesuf and Balcha (2014) also reported similar findings. Sharma and Mittra (1990), Paikaray et al (2001), Jahan et al (2014), Islam et al (2015), and Hussain et al (2016) reported that the use of an optimum dose of N might have helped for good vegetative growth and root system, which increased the higher N uptake by plants and hence increased yield and yield components of rice. The combination effect of variety and different N rate applications had a non-significant influence on NUP at different growth stages of the three varieties of Aus rice (Table 3).…”

Section: Nitrogen Uptake By Plants During Growth Stagementioning

confidence: 99%

Determination of Economic Nitrogen Rate for Transplanted Aus Rice Varieties of Bangladesh

Akter,

Bhuiyan,

Masum

2023

Bangladesh Agron. J.

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A field experiment was conducted at the Agronomy field, Bangladesh Rice Research Institute, Gazipur, Dhaka, from April to September 2019 to determine the economic nitrogen rates for popular transplanted Aus varieties. The experiment was carried out in a randomized complete block design (RCBD), with two factors. Factor A: three varieties as- BR26, BRRI dhan48, and BRRI dhan82; and Factor B: five levels of nitrogen rates as- 0, 40, 60, 80, 100 kg ha−1. The experimental data show the individual effect of variety and nitrogen (N) rate was significant in the case of N concentration, N uptake in grain and straw, and nitrogen harvest index (NHI). Overall, increasing N rate increases grain and straw's concentration irrespective of varieties. But higher N concentration and uptake were observed in the N rate of N60-N100 kg ha−1 in all varieties. Among the varieties, BRRI dhan82 observed higher N uptake (61.23 kg ha−1) in grain. Higher total N uptake was also observed in BRRI dhan48 at 80 kg N ha−1. NHI ranged from 55 to 72 % in different N levels, indicating 55 to 72% of the absorbed N translocated to the grains, and 45% to 32% remained in the dry matter within varieties. The estimated economic nitrogen dose for maximum yield was determined by regression analysis, and found that N rates of BR26, BRRI dhan48, and BRRI dhan82 were 97, 95, and 55 kg ha−1, respectively. The findings of this study indicated that the response of different N rates on three Aus varieties was linear up to 80 kg N ha−1 might be owing to better N uptake that made yield increase after that decreasing. Bangladesh Agron. J. 2023, 26(1): 84-95

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Rice Response to Nitrogen in Tidal Flooded Non-saline Soil

Cited by 10 publications

References 20 publications

Nitrogen response of two high yielding rice varieties as influenced by nitrogen levels and growing seasons

Nitrogen response of two high yielding rice varieties as influenced by nitrogen levels and growing seasons

Promising physiological traits associated with nitrogen use efficiency in rice under reduced N application

Determination of Economic Nitrogen Rate for Transplanted Aus Rice Varieties of Bangladesh

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