Effect of Different Nitrogen Levels on Morpho Physiological  and Yield Parameters in Rice (Oryza sativa L.)

Rajesh, K M; Thatikunta, Ramesh; Naik, D. Saida; Arunakumari, J.

doi:10.20546/ijcmas.2017.608.262

Cited by 3 publications

(5 citation statements)

References 7 publications

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“…Thus, to achieve the reduction of N fertilizer application, the selection of genotypes is crucial because of their inherent response for N. With the increased N application, previous studies also reported increase in grain yield, which is attributed to increased tillering, number of panicles, and grains (Devika et al, 2018;Zhang et al, 2020;Bama et al, 2021;Karmakar et al, 2021;Liang et al, 2021;Xin et al, 2022;Zhu et al, 2022) and increase in total dry matter accumulation (Pan et al, 2012;Singh et al, 2014;Jyothi Swaroopa and Lakshmi, 2015;Zhang et al, 2020). Days to 50% flowering and days to physiological maturity also increased significantly with increased N application due to increased vegetative growth phase (Mahajan et al, 2011;Rajesh et al, 2017;Wani et al, 2017;Ghoneim and Osman, 2018;Bv et al, 2019;Ye et al, 2019b;Mandal et al, 2022) and increased tillering (Wang et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…As noted in this study, with the increase in N application level from 0 to 200 kg ha –1 , Pn, g s , and E were also increased gradually, while C i values were decreased ( Gong et al., 2022 ). Increased N application increased the Pn that noted a positive correlation with leaf N content ( Fallah, 2012 ; Rajesh et al., 2017 ; Bv et al., 2019 ; Zhang et al., 2020 ), increased the E ( Zhang et al., 2020 ), and increased the g s at the vegetative stage ( Roy Chowdhury et al., 2014 ). Significantly higher values were recorded for g s and E with N100 compared to N0 ( Vijayalakshmi et al., 2015 ).…”

Section: Discussionmentioning

confidence: 99%

“…As noted in this study, with the increase in N application level from 0 to 200 kg ha -1 , Pn, g s , and E were also increased gradually, while C i values were decreased (Gong et al, 2022). Increased N application increased the Pn that noted a positive correlation with leaf N content (Fallah, 2012;Rajesh et al, 2017;Bv FIGURE 5 Relationship between nitrogen utilization index (NUI) and grain yield of rice genotypes at different N levels and seasons. 1, Anjali; 2, Birupa; 3, Daya;4, Heera;5, Indira;6, Nidhi;7, N22;8, Tella Hamsa;9, VL Dhan 209;10, Vasumati;11, IR64;12, GQ25;13, Varadhan;and14, MTU 1010. et al, 2019;Zhang et al, 2020), increased the E (Zhang et al, 2020), and increased the g s at the vegetative stage (Roy Chowdhury et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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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show abstract

“…Hasil penelitian ini sejalan dengan hasil penelitian Peng et al (2021) bahwa jumlah malai efektif dan hasil gabah meningkat dengan peningkatan dosis pupuk N. Hasil gabah dapat dikaitkan dengan peran N dalam meningkatkan komponen hasil gabah, yaitu jumlah malai per rumpun dan jumlah bulir isi per malai (Gewaily et al, 2018) serta persentase gabah terisi penuh (Rajesh et al, 2017). Lebih lanjut Mboyerwa et al (2021) melaporkan bahwa peningkatan dosis pupuk N meningkatkan jumlah malai per rumpun dan hasil gabah.…”

Section: Komponen Hasil Dan Efisiensi Penggunaan Pupuk Padi Varietas ...unclassified

“…Lebih lanjut Mboyerwa et al (2021) melaporkan bahwa peningkatan dosis pupuk N meningkatkan jumlah malai per rumpun dan hasil gabah. Rajesh et al (2017) menyatakan hasil panen berhubungan dengan tingkat kehijauan daun, jumlah anakan dan jumlah malai. Jumlah anakan dan jumlah malai per rumpun serta nilai SPAD semakin meningkat dengan peningkatan N, sehingga hasil juga meningkat seiring peningkatan dosis N. Peningkatan komponen hasil berhubungan dengan asupan hara yang lebih baik, pertumbuhan tanaman, dan peningkatan serapan hara oleh tanaman (An et al, 2018).…”

Section: Komponen Hasil Dan Efisiensi Penggunaan Pupuk Padi Varietas ...unclassified

Penetuan dosis pupuk nitrogen, fosfor, dan kalium optimum untuk padi sawah varietas bioemas agritan

Astuti,

Lubis,

Junaedi

2023

J. AGRO

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Fertilizer requirements for each rice variety are different from other varieties. Research on the optimum dosage of fertilization on new superior varieties is needed to obtain optimum growth and yield. This study aims to determine the optimum dosage of N, P, and K fertilizer for the growth and productivity of lowland rice of the Bioemas Agritan variety. The research was conducted at Banten Assessment Institute for Agricultural Technology, from February 2022 to June 2022 on soils with very low C-organic and total N conditions. The study consisted of three parallel experiments, namely the N, and P, K fertilization experiment using a single factor randomized complete block design which was repeated three times. Fertilizer dosages consist of five levels, namely 0, 50, 100, 150, and 200% of the reference dosage. Determination of the optimum dosage based on the maximum value of the relative yield quadratic equation. The optimum fertilizer dosage for the lowland rice variety Bioemas Agritan is 140,93% of the reference dosage or equivalent to 422,79 kg ha-1 urea, while the optimum dosage of P2O5 and K2O fertilizer cannot be determined.ABSTRAK Kebutuhan pupuk setiap varietas padi berbeda antara varietas satu dengan varietas lainnya. Penelitian dosis optimum pemupukan pada varietas unggul baru diperlukan untuk mendapatkan pertumbuhan dan hasil yang optimum. Penelitian ini bertujuan untuk menentukan dosis optimum pupuk N, P, K untuk pertumbuhan dan produktivitas padi sawah varietas Bioemas Agritan. Penelitian dilaksanakan di BPTP Banten, pada bulan Februari 2022 sampai dengan Juni 2022 pada tanah dengan kondisi C-organik dan N total sangat rendah. Penelitian terdiri atas tiga percobaan paralel yaitu percobaan pemupukan N, P, K menggunakan rancangan kelompok lengkap teracak faktor tunggal yang diulang sebanyak tiga kali. Dosis pupuk terdiri atas lima taraf yaitu 0, 50, 100, 150, dan 200 % dari dosis acuan. Penentuan dosis optimum berdasarkan nilai maksimum dari persamaan kuadratik hasil relatif. Dosis pupuk optimum untuk padi sawah varietas Bioemas Agritan adalah 140,93% dari dosis acuan atau setara dengan 422,79 kg ha-1 urea, sedangkan dosis optimum pupuk P2O5 dan K2Otidak dapat ditentukan.

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Effect of nutrient levels and nutrient schedules on physiological parameters and grain yield of upland rice intercropped in coconut garden

Raj

Suman

Prathapan

et al. 2018

JANS

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The experiment was conducted at Coconut Research Station, Balaramapuram with an objective to study the effect of nutrient levels and nutrient schedules on physiological parameters and grain yield of upland rice (MO 21-Prathyasa rice variety) intercropped in coconut. Field experiment was conducted in factorial randomized block design with nutrient levels as first factor and nutrient schedules as second factor in three replications. Nutrient levels had significant effect on the physiological parameters. Among the nutrient levels rested, NPK applied @ 120:30:60 recorded higher total chlorophyll (2.803 mg g recorded the highest grain yield and it was followed by NPK applied @ 70:30:35 kg ha -1 . Among the nutrient schedules, N applied as three equal splits, P as basal and K in two equal splits along with foliar spray of zinc sulphate 0.2 per cent and sodium borate 0.04 per cent at 45 DAS recorded the highest grain yield (3.25 t ha -1 ). The study clearly revealed that excessive vegetative growth is not a desirable parameter for higher grain yield.

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Effect of Different Nitrogen Levels on Morpho Physiological and Yield Parameters in Rice (Oryza sativa L.)

Cited by 3 publications

References 7 publications

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

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

Penetuan dosis pupuk nitrogen, fosfor, dan kalium optimum untuk padi sawah varietas bioemas agritan

Effect of nutrient levels and nutrient schedules on physiological parameters and grain yield of upland rice intercropped in coconut garden

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