Phosphorus Response ofOryza sativa, O. glaberrima, and Hybrid Rice Cultivars on an Ultisol

Accurate monitoring of hybrid rice phenology (RP) is crucial for breeding rice cultivars and controlling fertilizing amount. The aim of this study is to monitor the exact date of hybrid rice initial heading stage (IHSDAS) based on low-altitude remote sensing data and analyze the influence factors of RP. In this study, six field experiments were conducted in Ezhou city and Lingshui city from 2016 to 2019, which involved different rice cultivars and nitrogen rates. Three low-altitude remote sensing platforms were used to collect rice canopy reflectance. Firstly, we compared the performance of normalized difference vegetation index (NDVI) and red edge chlorophyll index (CIred edge) for monitoring RP. Secondly, double logistic function (DLF), asymmetric gauss function (AGF), and symmetric gauss function (SGF) were used to fit time-series CIred edge for acquiring phenological curves (PC), the feature: maximum curvature (MC) of PC was extracted to monitor IHSDAS. Finally, we analyzed the influence of rice cultivars, N rates, and air temperature on RP. The results indicated that CIred edge was more appropriate than NDVI for monitoring RP without saturation problem. Compared with DLF and AGF, SGF could fit CIred edge without over fitting problem. MC of SGF_CIred edge from all three platforms showed good performance in monitoring IHSDAS with good robustness, R2 varied between 0.82 and 0.95, RMSE ranged from 2.31 to 3.81. In addition, the results demonstrated that high air temperature might cause a decrease of IHSDAS, and the growth process of rice was delayed when more nitrogen fertilizer was applied before IHSDAS. This study illustrated that low-altitude remote sensing technology could be used for monitoring field-scale hybrid rice IHSDAS accurately.

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Agronomic performance of inbred and hybrid rice cultivars under simplified and reduced-input practices

Field Crops Research ◽

10.1016/j.fcr.2017.05.024 ◽

2017 ◽

Vol 210 ◽

pp. 129-135 ◽

Cited By ~ 18

Author(s):

Shen Yuan ◽

Lixiao Nie ◽

Fei Wang ◽

Jianliang Huang ◽

Shaobing Peng

Keyword(s):

Hybrid Rice ◽

Agronomic Performance ◽

Rice Cultivars

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Dry Matter Production and Nitrogen Absorption of Japonica-Indica Hybrid Rice Cultivars Grown under Upland Conditions.

Japanese Journal of Crop Science ◽

10.1626/jcs.71.28 ◽

2002 ◽

Vol 71 (1) ◽

pp. 28-35 ◽

Cited By ~ 3

Author(s):

Yoshiharu WADA ◽

San-Iku YUN ◽

Hiroki SASAKI ◽

Tadanobu MAEDA ◽

Kunio MIURA ◽

...

Keyword(s):

Dry Matter ◽

Hybrid Rice ◽

Dry Matter Production ◽

Rice Cultivars ◽

Nitrogen Absorption ◽

Matter Production ◽

Upland Conditions ◽

Indica Hybrid Rice

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Performance of super hybrid rice cultivars grown under no-tillage and direct seeding

Scientia Agricola ◽

10.1590/s0103-90162012000200003 ◽

2012 ◽

Vol 69 (2) ◽

pp. 103-107 ◽

Cited By ~ 7

Author(s):

Min Huang ◽

Yingbin Zou ◽

Peng Jiang ◽

Bing Xia ◽

Anmin Xiao

Keyword(s):

Hybrid Rice ◽

Direct Seeding ◽

No Tillage ◽

Rice Cultivars ◽

Super Hybrid Rice

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Morphological charateristics of the root system of Japonica-Indica hybrid rice cultivars

Root Research ◽

10.3117/rootres.2.41 ◽

1993 ◽

Vol 2 (2) ◽

pp. 41-43

Author(s):

Si-Yong KANG

Keyword(s):

Root System ◽

Hybrid Rice ◽

Rice Cultivars ◽

Indica Hybrid Rice

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Using Phospholipid Fatty Acid Technique to Analysis the Rhizosphere Specific Microbial Community of Seven Hybrid Rice Cultivars

Journal of Integrative Agriculture ◽

10.1016/s2095-3119(12)60186-5 ◽

2012 ◽

Vol 11 (11) ◽

pp. 1817-1827 ◽

Cited By ~ 2

Author(s):

Yu-jing ZHU ◽

Gui-ping HU ◽

Bo LIU ◽

Hua-an XIE ◽

Xue-fang ZHENG ◽

...

Keyword(s):

Fatty Acid ◽

Microbial Community ◽

Hybrid Rice ◽

Phospholipid Fatty Acid ◽

Rice Cultivars

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Effects of N application strategies on N leaching loss in paddy soil and N use characteristics in different super hybrid rice cultivars

Paddy and Water Environment ◽

10.1007/s10333-019-00762-x ◽

2019 ◽

Vol 18 (1) ◽

pp. 27-41 ◽

Cited By ~ 1

Author(s):

Zhigang Bai ◽

Jie Huang ◽

Lianfeng Zhu ◽

Xiaochuang Cao ◽

Chunquan Zhu ◽

...

Keyword(s):

Paddy Soil ◽

Hybrid Rice ◽

N Leaching ◽

Rice Cultivars ◽

N Application ◽

Super Hybrid Rice ◽

Leaching Loss ◽

N Use

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Effect of Rice Cultivar, Type, Form, and Moisture Content on the Angle of Repose

Applied Engineering in Agriculture ◽

10.13031/aea.13156 ◽

2019 ◽

Vol 35 (4) ◽

pp. 361-368

Author(s):

Hu Shi ◽

Terry J. Siebenmorgen

Keyword(s):

Moisture Content ◽

Hybrid Rice ◽

Brown Rice ◽

Rice Cultivar ◽

The United States ◽

Angle Of Repose ◽

Rice Cultivars ◽

Milled Rice ◽

Rough Rice ◽

Rice Samples

Abstract.The angle of repose (AoR) is a primary characteristic determining the flowablity of grains and thus is an important property for designing rice handling and storage facilities. The aim of this study was to evaluate the AoR of contemporary rice cultivars grown in the United States. An apparatus was constructed to measure both the emptying and piling AoR of rice samples. The effect of rice cultivars (pureline and hybrid), rice types (long-, medium-, and short-grain rice), rice forms (rough, brown, head, and broken milled rice), and moisture content on the AoR of rice were evaluated. Results indicated that all of these factors significantly affected the AoR of rice. The piling AoR was significantly less than the emptying AoR. Hybrid rice cultivars tended to have greater AoR than purelines, which was attributed to the pubescence characteristic of their hulls. The emptying AoR and piling AoR of tested long-grain rough rice cultivars at 12% to 21% moisture content were in the range of 32.7° to 39.7° and 29.6° to 36.9°, respectively.Increasing the moisture content of long-grain rough rice led to greater AoR, possibly due to increased cohesion of rice kernels. Long-grain rough rice cultivars had slightly lesser AoR than those of medium- and short-grain rice cultivars. Among all tested rice forms, brown rice had the least AoR. Head and broken milled rice had approximately the same AoR as rough rice. Keywords: Angle of repose, Bridging, Flowablity, Friction, Rice.

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The Influence of Nitrogen Application Level on Eating Quality of the Two Indica-Japonica Hybrid Rice Cultivars

Plants ◽

10.3390/plants9121663 ◽

2020 ◽

Vol 9 (12) ◽

pp. 1663

Author(s):

Xincheng Zhang ◽

Liangbo Fu ◽

Yishan Tu ◽

Huifang Zhao ◽

Liuhui Kuang ◽

...

Keyword(s):

Hybrid Rice ◽

Storage Proteins ◽

Yield Potential ◽

Eating Quality ◽

Japonica Rice ◽

Rice Cultivars ◽

N Level ◽

Great Yield ◽

Negative Effect

Indica-japonica hybrid rice cultivars show great yield potential but poor eating quality and require more nitrogen (N) input relative to japonica rice. However, the effect of N levels on the eating quality of indica-japonica hybrid rice is little known. A field experiment was carried out to investigate the effects of four N levels on two indica-japonica hybrid rice cultivars (Yongyou12 and Yongyou17) differing in eating quality. The results showed that the contents of amylose chains and water-insoluble storage proteins, especially prolamin, increased largely under a high N level, leading to deterioration of the rice-eating quality, although a low N level (100 N kg/ha) had a less negative effect on the eating quality. Moreover, both of the indica-japonica hybrids had high ratios of inferior grains (IG), and the ratio of IG increased with the N level. Grain weight and the immature ratio of IG were reduced and increased with the N level, respectively, which are also factors for deterioration of the eating quality. The two cultivars differed greatly in the responses of eating quality to the N level, with Yongyou17 being more sensitive than Yongyou12. The current results indicated that a high N level deteriorates the eating quality of indica-japonica hybrid rice mainly due to a large increase of IG.

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