No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment

Huang, Min; Chen, Jiana; Cao, Fuliang; Zou, Yingbin; Uphoff, Norman

doi:10.1016/s2095-3119(17)61873-2

Cited by 3 publications

(1 citation statement)

References 34 publications

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“…These reports indicate that the estimated requirement is 27-33 kg N/t grains. Averaged across 11 years (Hunan Province, China, from 2004 to 2014), grain yield and N requirements were 9.5 t/ha and 20.2 kg/t or 192 kg/ha, respectively 63 . Application of 165 kg N/ha along with a plant density of 24-27×10 4 hills/ha signi cantly increased the grain yield in a widely cultivated hybrid Liangyou 3905 64 .…”

Section: Dilemma In Choosing Inbred or Hybrid Varietymentioning

confidence: 99%

Grain Yield Performance of Hybrid Rice in Multi-Environment Tests for Thirty-two Years in India

Muralidharan¹,

Prasad²,

Rao³

et al. 2020

Preprint

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Background: Hybrid F1genotypes with higher yields or improvement in other traits of economic value due to heterosis as compared to inbred local check varieties (ILCV), are identified and released as hybrid commercial varieties. We analyzed the yield data of 2070 hybrid F1 genotypes with ILCV evaluated over 32 years (1988 to 2019) in 2376 multi-environment experiments executed at 102 locations in the irrigated ecosystem across India. Results: The genetic gain or loss in yield of hybrid F1 genotypes estimated over the test duration was non-significant. Hybrid F1 genotypes produced 10% more grains (728-2588 kg/ha) than ILCV in many experiments at several locations. Our analyses have established that grain yields of 7.0 to 7.9 t/ha, were harvested in hybrid F1 genotypes with early, mid-early and medium maturity duration, and in those with medium slender grains at many locations in 362 experiments. A higher level of rice productivity per day (62 to 63 kg/ha) was recorded with the early maturing and mid-early maturing hybrid F1 genotypes in these tests. The N requirement to produce 8 t/ha of hybrid rice grains was 15 kg N/t as compared with a minimum of 20 kg N/t used in China. Both the hybrids and inbreds in these experiments produced grain yields that were easily attained previously with high yielding (≥10 t/ha) commercial inbreds since 1968. Unless the attainable yields are reached in inbred checks with the proven appropriate crop production practices in an experiment, it is futile to estimate a genetic gain or loss for grain yields in new genotypes developed.Conclusions: Hybrid genotypes bred in India produced yields of 7 to 8 t/ha which matched with reports from China on hybrids and green super rice; these India-bred hybrids showed higher productivity per day and shorter maturity periods than super hybrids of China. Opportunities still exist to breed indica/japonica hybrids to obtain more heterotic early and mid-early maturing hybrids, and develop efficient agronomical practices to realize the potential advantages from hybrids. There is scope for breeders to limit test locations to represent specific target areas to avoid data loss. Focusing on removing obstacles in hybrid seed production is essential to exploit yield heterosis in hybrids, and to make hybrid rice technology profitable to farmers.

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Section: Dilemma In Choosing Inbred or Hybrid Varietymentioning

confidence: 99%

Grain Yield Performance of Hybrid Rice in Multi-Environment Tests for Thirty-two Years in India

Muralidharan¹,

Prasad²,

Rao³

et al. 2020

Preprint

View full text Add to dashboard Cite

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Effects of no-tillage practice for late-rice on rice yield and global warming potential in double-cropping rice systems

Wang

Deng

et al. 2022

Paddy Water Environ

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Review of rice transplanter and direct seeder to be applied in Indonesia paddy field

Pitoyo

Idkham

2021

IOP Conf. Ser.: Earth Environ. Sci.

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The challenge to plant one seed or plant per hill by rice ordinary rice transplanter (RT) is still difficult to be achieved due to random in sowing seed by on rice nursery tray. But due to the vigority of seed after sowing in the field and also the unfavorable condition, the more number of seed are still needed and the yield lower compare transplanter method. Recently, the use of rice direct seeding has been increasing rapidly owing to rural labor shortages and continuous increases in agricultural production costs. This article reviews the research and application progress of mechanized rice direct seeding including direct seeding technologies, precision rice seeding, precision rice seed-metering devices. The other important component on succession direct seeding method is also discussed i.e. calcium gypsum coating and iron powder coating. Operating direct seeding machine also need consider about land and water management. Paddy field need to be managed since the seed drooped in order give favor condition of seed and facility the seed with optimum growing condition. In this approach, pre-germinated seeds are uniformly hill-dropped in the expected positions in puddled soil. The both technology PNRT and RDS have prospect and great potential for promoting the development of precession on rice cultivation in Asia.

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No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment

Cited by 3 publications

References 34 publications

Grain Yield Performance of Hybrid Rice in Multi-Environment Tests for Thirty-two Years in India

Grain Yield Performance of Hybrid Rice in Multi-Environment Tests for Thirty-two Years in India

Effects of no-tillage practice for late-rice on rice yield and global warming potential in double-cropping rice systems

Review of rice transplanter and direct seeder to be applied in Indonesia paddy field

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