Population quality and grain yield construction of mid-season indica hybrid rice “Wandao153” under different N applications

Previous studies have revealed that the japonica/indica hybrid rice has a higher yield potential, biomass production, and nitrogen (N) accumulation than japonica rice in China, however, at a single N application rate. It remains unclear whether it also occurs at a higher or lower N application rate under the same field condition. To investigate the effects of nitrogen application rates on grain yield, N uptake, dry matter accumulation, and agronomic N use efficiency, field experiments were conducted in Jinhua City, Zhejiang Province during three consecutive growth seasons in 2016, 2017, and 2018. Two japonica/indica hybrid varieties (Yongyou 12 and Yongyou 538) and two japonica varieties (Xiushui 134 and Jia 58) were exposed to five N application rates (0, 150, 225, 300, and 375 kg ha−1). The results showed that grain yields of all the varieties increased with increasing nitrogen application rates, except for Jia 58 whose optimum nitrogen level was 225 kg ha−1, because no significant difference was observed between N225 and N300. Across the four rice varieties, N uptake increased significantly with increased N-fertilizer rates at all the growth stages (p < 0.05). Across the three planting years, the average grain yield of japonica/indica hybrid rice was higher than that of japonica rice by 75.6% at N0, 57.2% at N150, 41.1% at N225, 38.3% at N300, and 45.8% at N375. We also found that as compared with japonica rice, the japonica/indica hybrid rice had more grain yield, higher dry matter, and higher N uptake at all growth stages, regardless of the N application rate.

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Analysis of Grain Yield Formation Components of Extra Heavy-Panicle-Type Mid-Season Indica Hybrid Rice

Journal of Plant Growth Regulation ◽

10.1007/s00344-021-10353-y ◽

2021 ◽

Author(s):

Xiaolong Zhong ◽

Hafiz Athar Hussain ◽

Bingbing Zhao ◽

Manyu Huang ◽

Saddam Hussain ◽

...

Keyword(s):

Grain Yield ◽

Hybrid Rice ◽

Yield Formation ◽

Indica Hybrid Rice

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Phosphorus fertilization in inbred and hybrid rice

Dhaka University Journal of Biological Sciences ◽

10.3329/dujbs.v19i2.8962 ◽

1970 ◽

Vol 19 (2) ◽

pp. 181-187

Author(s):

MR Islam ◽

PK Saha ◽

SK Zaman ◽

MJ Uddin

Keyword(s):

Grain Yield ◽

Key Words ◽

Hybrid Rice ◽

Phosphorus Fertilization ◽

Phosphorus Fertilizer ◽

Yield Difference ◽

P Balance ◽

Rice Genotypes ◽

Boro Rice

Five phosphorus rates (0, 5, 10, 20 and 30 kg P/ha) were tested with four rice genotypes in Boro (BRRI dhan36, BRRI dhan45, EH1 and EH2) and T. Aman (BRRI dhan30, BRRI dhan49, EH1 and EH2) season. Phosphorus rates did not influence grain yield irrespective of varieties in T. Aman season while in Boro season P response was observed among the P rates. Application of P @ 10 kg/ha significantly increased the grain yield. But when P was applied @ 20 and 30 kg P/ha, the grain yield difference was not significant. The optimum and economic rate of P for T. Aman was 20 kg P/ha but in Boro rice the optimum and economic doses of P were 22 and 30 kg/ha, respectively. Hybrid entries (EH1 and EH2) used P more efficiently than inbred varieties. A negative P balance was observed up to 10 kg P/ha. Key words: Response; Phosphorus fertilizer; Inbred; Hybrid rice DOI: http://dx.doi.org/10.3329/dujbs.v19i2.8962 DUJBS 2010; 19(2): 181-187

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Characterization of Populations with Different Yield Levels in Indica Hybrid Rice in Plateau Area of Guizhou Province

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2016.01817 ◽

2016 ◽

Vol 42 (12) ◽

pp. 1817

Author(s):

De-Qiang LUO ◽

Shao-Hua WANG ◽

Xue-Hai JIANG ◽

Gang-Hua LI ◽

Wei-Jia ZHOU ◽

...

Keyword(s):

Hybrid Rice ◽

Guizhou Province ◽

Plateau Area ◽

Indica Hybrid Rice

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Combining Ability Analysis of Agronomic Trait in Indica×Indica Hybrid Rice

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2017.01448 ◽

2017 ◽

Vol 43 (10) ◽

pp. 1448

Author(s):

Zheng ZHANG ◽

Xue-Li ZHANG ◽

Bo-Cheng MO ◽

Zhi-Jun DAI ◽

Zhong-Li HU ◽

...

Keyword(s):

Combining Ability ◽

Hybrid Rice ◽

Agronomic Trait ◽

Combining Ability Analysis ◽

Indica Hybrid Rice

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Analysis of heterosis, combining ability and heritability of cadmium content in brown rice of tri-line indica hybrid rice

CHINESE JOURNAL OF ECO-AGRICULTURE ◽

10.3724/sp.j.1011..2011.00668 ◽

2011 ◽

Vol 19 (3) ◽

pp. 668-671

Author(s):

Ying-Jiang CAO ◽

Shu-Mei YOU ◽

Kai-Feng JIANG ◽

Li YANG ◽

Qian-Hua YANG ◽

...

Keyword(s):

Combining Ability ◽

Hybrid Rice ◽

Brown Rice ◽

Cadmium Content ◽

Indica Hybrid Rice

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Impact of Different Water Management Regimes on the Growth, Productivity, and Resource Use Efficiency of Dry Direct Seeded Rice in Central Punjab-Pakistan

Agronomy ◽

10.3390/agronomy11061151 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1151

Author(s):

Sadam Hussain ◽

Saddam Hussain ◽

Zubair Aslam ◽

Muhammad Rafiq ◽

Adeel Abbas ◽

...

Keyword(s):

Grain Yield ◽

Hybrid Rice ◽

Water Productivity ◽

Dry Weight ◽

Cost Ratio ◽

Yield Attributes ◽

Benefit Cost Ratio ◽

Direct Seeded ◽

Total Dry Weight ◽

Benefit Cost

Dry direct-seeded rice has been shown to save irrigation water and labor. Nonetheless, irrigation management in dry direct-seeded rice has received very little attention. Here, we examined the potential of different irrigation regimes: aerobic rice (AR), alternate wetting and drying (AWD) and continuous flooding (CF) in dry direct-seeded rice cultivation on two rice cultivars (Pride-1 (hybrid indica) and NB-1 (inbred indica)). Growth, yield attributes, grain yield, total water input, water productivity and benefit cost ratio were measured. Our results showed that AR saved 11.22 and 28.40%, and 5.72 and 32.98% water compared with AWD and CF during 2018 and 2020, respectively. There was a significant difference in grain yield among treatments and cultivars. AWD and CF produced statistically same total dry weight and grain yield, while AR reduced the total dry weight by 31.34% and 38.04% and grain yield by 34.82% and 38.16% in comparison to AWD and CF, respectively, across the years. Except for 1000-grain weight and harvest index in AWD and CF, further differences in total dry weight and grain yield among irrigation treatments were primarily correlated with variations in yield attributes. Among the cultivars, hybrid rice performed better than inbred rice. Over the two-year period, hybrid rice increased total dry weight, grain yield, and water productivity by 9.28%, 13.05%, and 14.28%, respectively, as compared to inbred rice. Regarding water productivity (WP), the maximum percentage (40.90 and 26.53%) was recorded for AWD compared to AR and CF. Among cultivars, more water productivity (14.28%) was calculated for hybrid rice than inbred one. Chlorophyll and carotenoid contents, leaf area index and crop growth rate contributed to higher grain yield of hybrid rice under AWD and CF. In contrast to WP, the maximum benefit cost ratio was estimated to be higher for CF than that of AR and AWD. For the cultivars, the maximum value (2.26 in 2018 and 2.32 in 2020) was calculated for hybrid rice compared with the inbred one. In conclusion, these results suggests that AWD with maximum WP and CF with maximum BCR could be more efficient approaches than AR. Under CF, hybrid rice cultivars with higher yield and yield-related attributes, WP and BCR performed better.

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Optimizing Planting Density and Impact of Panicle Types on Grain Yield and Microclimatic Response Index of Hybrid Rice (Oryza sativa L.)

International Journal of Plant Production ◽

10.1007/s42106-021-00150-8 ◽

2021 ◽

Author(s):

Guotao Yang ◽

Xuechun Wang ◽

Farhan Nabi ◽

Hongni Wang ◽

Changkun Zhao ◽

...

Keyword(s):

Relative Humidity ◽

Light Intensity ◽

Grain Yield ◽

Hybrid Rice ◽

Plant Density ◽

Oryza Sativa L ◽

Planting Density ◽

Response Index ◽

Lower Position ◽

High Plant Density

AbstractThe architecture of rice plant represents important and complex agronomic traits, such as panicles morphology, which directly influence the microclimate of rice population and consequently grain yield. To enhance yield, modification of plant architecture to create new hybrid cultivars is considered a sustainable approach. The current study includes an investigation of yield and microclimate response index under low to high plant density of two indica hybrid rice R498 (curved panicles) and R499 (erect panicles), from 2017 to 2018. The split-plot design included planting densities of 11.9–36.2 plant/m2. The results showed that compared with R498, R499 produced a higher grain yield of 8.02–8.83 t/ha at a higher planting density of 26.5–36.2 plant/m2. The response index of light intensity and relative humidity to the planting density of R499 was higher than that of R498 at the lower position of the rice population. However, the response index of temperature to the planting density of R499 was higher at the upper position (0.2–1.4%) than at the lower position. Compared with R498, R499 at a high planting density developed lower relative humidity (78–88%) and higher light intensity (9900–15,916 lx) at the lower position of the rice population. Our finding suggests that erect panicles are highly related to grain yield microclimatic contributors under a highly dense rice population, such as light intensity utilization, humidity, and temperature. The application of erect panicle rice type provides a potential strategy for yield improvement by increasing microclimatic conditions in rice.

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Genotypic Variation in Nutrient Uptake Requirements of Rice Using the QUEFTS Model

Agronomy ◽

10.3390/agronomy11010026 ◽

2020 ◽

Vol 11 (1) ◽

pp. 26

Author(s):

Tao Sun ◽

Xin Yang ◽

Sheng Tang ◽

Kefeng Han ◽

Ping He ◽

...

Keyword(s):

Nutrient Uptake ◽

Field Experiments ◽

Hybrid Rice ◽

Genotypic Variation ◽

Tropical Soils ◽

Study Data ◽

Japonica Rice ◽

Rice Varieties ◽

Indica Hybrid Rice ◽

Validation Experiments

Nutrient requirements for single-season rice using the quantitative evaluation of the fertility of tropical soils (QUEFTS) model in China have been estimated in a previous study, which involved all the rice varieties; however, it is unclear whether a similar result can be obtained for different rice varieties. In this study, data were collected from field experiments conducted from 2016 to 2019 in Zhejiang Province, China. The dataset was separated into two parts: japonica/indica hybrid rice and japonica rice. To produce 1000 kg of grain, 13.5 kg N, 3.6 kg P, and 20.4 kg K were required in the above-ground plant dry matter for japonica/indica hybrid rice, and the corresponding internal efficiencies (IEs) were 74.0 kg grain per kg N, 279.1 kg grain per kg P, and 49.1 kg grain per kg K. For japonica rice, 17.6 kg N, 4.1 kg P, and 23.0 kg K were required to produce 1000 kg of grain, and the corresponding IEs were 56.8 kg grain per kg N, 244.6 kg grain per kg P, and 43.5 kg grain per kg K. Field validation experiments indicated that the QUEFTS model could be used to estimate nutrient uptake of different rice varieties. We suggest that variety should be taken into consideration when estimating nutrient uptake for rice using the QUEFTS model, which would improve this model.

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