Suitable growing zone and yield potential for late-maturity type of Yongyou japonica/indica hybrid rice in the lower reaches of Yangtze River, China

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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Effects of nitrogen application rate on the photosynthetic pigment, leaf fluorescence characteristics, and yield of indica hybrid rice and their interrelations

Scientific Reports ◽

10.1038/s41598-021-86858-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jinfeng Peng ◽

Yuehua Feng ◽

Xiaoke Wang ◽

Jie Li ◽

Guiling Xu ◽

...

Keyword(s):

Quantum Yield ◽

Hybrid Rice ◽

Photosynthetic Pigment ◽

Application Rate ◽

Maturity Stage ◽

Nitrogen Application ◽

Fluorescence Characteristics ◽

Heading Stage ◽

Indica Hybrid Rice ◽

Nitrogen Application Rate

AbstractA field experiment employing the rice cultivars Qyou6 and Yixiangyou2115 as materials and different nitrogen application rates was conducted in Huangping County, Guizhou Province in 2019 to determine the effects of nitrogen application rate on photosynthetic pigments, leaf fluorescence characteristics, yield, and their interrelations in indica hybrid rice. The results showed that photosynthetic pigment contents generally increased with increasing nitrogen application rate. As the nitrogen rate increased, the maximal quantum yield of PSII (Fv/Fm), actual quantum yield of PSII (ΦPSII), and relative electron transfer rate at PSII (ETR) first decreased and then increased at the booting stage; Fv/Fm and ΦPSII decreased while ETR first increased and then decreased at the heading stage; nevertheless, Fv/Fm and ΦPSII first decreased and then increased but ETR was just the opposite at the maturity stage. Non-photochemical quenching coefficient (qN) and quantum yield of regulatory energy dissipation at PSII (Y(NPQ)) first increased and then decreased whereas quantum yield of non-regulatory energy dissipation at PSII (Y(NO)) first decreased and then increased at the booting, heading, and maturity stages with increasing nitrogen application rate. Photochemical quenching coefficient (qP) showed an increasing trend as the nitrogen rate increased in the range of 150–300 kg/ha at the heading and maturity stages. Photosynthetic pigments, leaf fluorescence characteristics, and yield and its components were significantly correlated. First, chlorophylls a and b were significantly negatively correlated with Fv/Fm while significantly positively correlated with qP at the heading stage. Secondly, Carotenoids were significantly positively correlated with the effective panicle number (EPN) at the booting stage while significantly negatively correlated with the spikelets per panicle (SPP) at the heading stage. Chlorophyll a and carotenoids were significantly positively correlated with EPN but significantly negatively correlated with spikelet filling (SF) at the maturity stage. In addition, qP was significantly negatively correlated with EPN at the booting stage. At the heading stage, Fv/Fm and Y(NO) were significantly negatively correlated with EPN and SPP, respectively, and Fv/Fm and ΦPSII were significantly positively related to SF. Moreover, qP was extremely significantly positively related to EPN whereas Fv/Fm was extremely significantly negatively correlated with grain yield at the maturity stage. Appropriate nitrogen application rates can enhance photosynthetic pigment contents, improve the photochemical efficiency and proportion of the open part of the reaction center of PSII, and promote the quantum efficiency and self-protection ability of PSII, thereby increasing photosynthetic efficiency and yield. Under the conditions adopted in this experiment, a parabolic relationship was observed between the nitrogen application rate and grain yield. The regression analysis results showed that the best nitrogen application rate of indica hybrid rice is 168.16 kg ha−1 and the highest yield is 11,804.87 kg ha−1.

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A Review on The Physical, Milling Quality and Physicochemical Characteristic of Hipa 6 Jete and Hipa 7

Kaunia: Integration and Interconnection Islam and Science ◽

10.14421/kaunia.2149 ◽

2020 ◽

Vol 16 (2) ◽

pp. 25

Author(s):

Shinta Dewi Ardhiyanti ◽

Siti Dewi Indrasari

Keyword(s):

First Generation ◽

Hybrid Rice ◽

Amylose Content ◽

Physicochemical Characteristic ◽

Physicochemical Characteristics ◽

Yield Potential ◽

Physical Quality ◽

Rice Quality ◽

Milling Quality ◽

Head Rice

Up to now the Agriculture Ministry of Republic of Indonesia has released 19 varieties of hybrid rice. Hipa 6 Jete and Hipa 7 varieties are two of them. Hybrid rice is a group of rice plants formed from first generation individuals (F1) derivative of a combination of crossing between certain elders. Hybrid rice superior varieties has a higher yield potential than inbred superior varieties that dominate rice cultivation areas. Rice quality is one of the factors that determine the level of consumer acceptance of a variety. The rice quality is influenced by several factors such as physical quality, cooking quality and taste quality. This paper aims to review the physical quality, milling quality and physical properties of Hipa 6 Jete and Hipa 7. The length of Hipa 6 Jete and Hipa 7 are long and the shape are slender. Based on the head rice and broken rice percentage both Hipa 6 Jete and Hipa 7 are met the medium 2 and 3 quality class (SNI 6128:2015). Based on the physicochemical characteristics both Hipa 6 Jete and Hipa 7 are classified as intermediate amylose content with soft gel consistency and with high intermediate gelatinization temperature. In cooling condition the cooked rice of Hipa 6 Jete and Hipa 7 are soft texture.

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Grain and Dry Matter Yields and Partitioning of Assimilates in Japonica/Indica Hybrid Rice

Crop Science ◽

10.2135/cropsci2002.7660 ◽

2002 ◽

Vol 42 (3) ◽

pp. 766-772 ◽

Cited By ~ 36

Author(s):

Jianchang Yang ◽

Shaobing Peng ◽

Zujian Zhang ◽

Zhiqin Wang ◽

Romeo M. Visperas ◽

...

Keyword(s):

Dry Matter ◽

Hybrid Rice ◽

Indica Hybrid Rice

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Evaluation of Yield, Reaction to Diseases, and Grain Physical Attributes of Some Introduced Rice Hybrids in Ghana

International Journal of Agronomy ◽

10.1155/2019/3926765 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Samuel Oppong Abebrese ◽

Alex Yeboah ◽

Wilson Dogbe ◽

Paul Kofi Ayirebi Dartey ◽

Richard Akromah ◽

...

Keyword(s):

Grain Yield ◽

Yield Components ◽

Hybrid Rice ◽

Block Design ◽

Leaf Blight ◽

Rice Production ◽

Bacterial Leaf Blight ◽

Yield Potential ◽

Randomized Complete Block Design ◽

Physical Attributes

Hybrid rice technology is one of the promising, sustainable, and proven technologies for increasing rice production and productivity with a yield advantage of 15–30% over modern inbred varieties. The potential of hybrid rice has so far not been exploited in Ghana. This study was undertaken to evaluate the yield potential, reaction to diseases, and physical grain attributes of some introduced hybrids. The trials were laid out in a randomized complete block design (RCBD) with three replicates across three locations. Data were taken on grain yield, yield components, reaction to diseases, and grain physical characteristics. Four promising hybrids (SWARNA 2, ARGH 1501, ARGH 1502, and ARGH 1503) with a mean yield advantage of 15–20.8% over the best inbred check “AgraRice” were identified. With few exceptions, the hybrids were broadly adapted and had adequate resistance to blast and bacterial leaf blight. Most of the test hybrids had long slender grains which make them acceptable to the Ghanaian market but lacked aroma.

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Variation in maturity, stolon development and frost resistance of Glycine javanica

Australian Journal of Experimental Agriculture ◽

10.1071/ea9660380 ◽

1966 ◽

Vol 6 (23) ◽

pp. 380 ◽

Cited By ~ 3

Author(s):

LA Edye ◽

HJ Kiers

Keyword(s):

Flowering Time ◽

Frost Resistance ◽

Seed Set ◽

Flowering Period ◽

Early Variety ◽

South Eastern ◽

Discontinuous Variation ◽

Late Maturity ◽

Maturity Type ◽

Stolon Development

Introductions of G. javanica showed wide variation in flowering time, seed set, seed yield, stolon development, and frost resistance at Lawes in south-eastern Queensland. The discontinuous variation in flowering time of 50 introductions over 103 days at Lawes has enabled very early, early, midseason, and late maturity types to be defined. These maturity classes hold equally well when applied at 'Lansdown' in north Queensland. With the exception of C.P.I. 25336, only very early and early introductions set seed in large areas of south-eastern Queensland where frosts are experienced in June and July. C.P.I. 25336, an early variety with an extended flowering period, did not set seed before the first heavy frost on June 24, 1961. The association of maturity type, stolon development, and frost resistance with the country of origin of the introductions is mentioned and the significance of these characters in adapting G. javanica to Australian conditions is discussed.

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