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Enriching Iodine and Regulating Grain Aroma,Appearance Quality,and Yield in Aromatic Rice by Foliar Application of Sodium Iodide

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Rice science 2024年第3期31卷 328-342,I0046-I0054页

作者： HONG Weiyuan DUAN Meiyang WANG Yifei CHEN Yongjian MO Zhaowen QI Jianying pan shenggang TANG Xiangru State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources South China Agricultural UniversityGuangzhou 510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairGuangzhou 510642China Guangzhou Key Laboratory for Science and Technology of Aromatic Rice Guangzhou 510642China

Applying iodine fertilizers to cultivate iodine-rich crops for daily intake is an effective approach for iodine supplementation,especially for aromatic *** experiments were conducted during the early growing seasons of 2021 and 2022 to evaluate the impacts of foliar application of iodine fertilizer on aromatic rice and to explore the optimal iodine fertilizer *** the full heading stage,six different concentrations of sodium iodide solutions of 0%(CK),0.010%(T1),0.025%(T2),0.050%(T3),0.075%(T4),and 0.100%(T5)were applied to indica aromatic rice cultivars Meixiangzhan 2 and *** results showed that sodium iodide treatments significantly increased the iodine and sodium contents in both leaves and *** with the CK,the T1 and T2 treatments increased the 2-acetyl-1-pyrroline(2-AP)content in mature grains by 8.41%-101.66%and 13.58%-74.60%,*** in the contents of 1-pyrroline-5-carboxylic acid,proline,1-pyrroline,and methylglyoxal,as well as the activity of proline dehydrogenase were also ***,sodium iodide treatments remarkably decreased the chalky grain rate,chalkiness area,and chalkiness degree of aromatic rice,with the T2 treatment exhibiting a 17.79%-47.42%decrease in chalkiness degree compared with the ***,T1 and T2 treatments showed beneficial impacts on chlorophyll content,photosynthetic characteristics,and yield components,while T3,T4,and T5 treatments exhibited adverse effects on leaf and grain *** linear discriminant analysis revealed significant differences between *** correlation analysis and piecewise structural equation modeling showed that the iodine and sodium influenced the photosynthetic characteristics and chlorophyll content of the leaves,thereby regulating the 2-AP biosynthesis and yield components,ultimately affecting the 2-AP content and ***,this study suggests that foliar application of 0.025%sodium iodide is an effective method t

关键词： 2-acetyl-1-pyrroline appearance quality aromatic rice foliar application grain yield iodine

Epoxiconazole Improved Photosynthesis,Yield Formation,Grain Quality and 2-Acetyl-1-Pyrroline Biosynthesis of Fragrant Rice

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Rice science 2022年第2期29卷 189-196页

作者： LUO Haowen HE Longxin DU Bin pan shenggang MO Zhaowen YANG Shuying ZOU Yingbin TANG Xiangru State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources South China Agricultural UniversityGuangzhou 510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairsGuangzhou 510642China Guangzhou Key Laboratory for Science and Technology of Aromatic Rice Guangzhou 510642China College of Agronomy Hunan Agricultural UniversityChangsha 410128China

Epoxiconazole is a triazole ***,the effects of epoxiconazole on crop productivity and quality were rarely *** this study,we investigated the effects of epoxiconazole application on yield formation,grain quality attributes,and 2-acetyl-1-pyrroline(2-AP)content in fragrant rice.A three-year field experiment was carried out with a fragrant rice variety,Meixiangzhan *** the heading stage,0,0.02,0.04,0.08,0.16 and 0.32 g/L epoxiconazole solutions were foliar applied to fragrant rice plants,*** results showed that epoxiconazole application significantly increased grain yield,seed-setting rate and 1000-grain *** content and net photosynthetic rate of fragrant rice during the grain-filling stage significantly increased due to epoxiconazole *** application of epoxiconazole at 0.08 g/L increased grain protein content and decreased both chalky rice rate and chalkiness area ratio of fragrant *** also substantially increased grain 2-AP content by inducing the regulation in contents of related synthetic precursors,including proline,pyrroline-5-carboxylic acid,Δ1-pyrroline and ***,foliar application of epoxiconazole could be used for the improvement in grain yield,grain quality and 2-AP content in fragrant rice production when applied concentration at 0.08-0.32 g/*** findings provided the new roles of epoxiconazole in crop production.

关键词： epoxiconazole fragrant rice 2-acetyl-1-pyrroline yield formation grain quality

Enhancement of Ultrasonic Seed Treatment on Yield,Grain Quality Characters,and 2-Acetyl-1-Pyrroline Biosynthesis in Different Fragrant Rice Genotypes

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Phyton-International Journal of Experimental Botany 2022年第11期91卷 2461-2473页

作者： Rujian Lan Meiyang Duan Feida Wu Rifang Lai Zhaowen Mo shenggang pan Xiangru Tang State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources South China Agricultural UniversityGuangzhou510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of AgricultureGuangzhou510642China Guangzhou Key Laboratory for Science and Technology of Aromatic Rice Guangzhou510642China

Fragrant rice is popular for the good grain quality and special *** present study conducted a field experiment to investigate the effects of ultrasonic seed treatment on grain yield,quality characters,physiological properties and aroma biosynthesis of different fragrant rice *** seeds of three fragrant rice genotypes were exposed to 1 min of ultrasonic vibration and then cultivated in paddy *** results of present study showed that ultrasonic seed treatment increased grain yield of all fragrant rice genotypes but the responses of yield formation to ultrasonic were varied with different *** with control,ultrasonic seed treatment increased grain 2-acetyl-1-pyrroline(2-AP,the key component of fragrant rice aroma)content by 13.40%–44.88%.Ultrasonic seed treatment also reduced the crude protein contents in *** head rice rate,rice length,chalky rice rate,and chalkiness degree were influenced by ultrasonic for one or two fragrant rice *** activities of peroxidase and superoxide dismutase were also enhanced due to ultrasonic seed *** conclusion,ultrasonic seed treatment increased grain,regulated grain aroma and quality,and improved stress resistance of fragrant rice varieties.

关键词： Fragrant rice yield formation crop growth grain quality 2-acetyl-1-pyrroline

Assessing the yield difference of double-cropping rice in South China driven by radiation use efficiency

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Journal of Integrative Agriculture 2024年第11期23卷 3692-3705页

作者： Jian Lu Sicheng Deng Muhammad Imran Jingyin Xie Yuanyuan Li Jianying Qi shenggang pan Xiangru Tang Meiyang Duan State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/College of Agriculture South China Agricultural UniversityGuangzhou 510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairsGuangzhou 510642China Guangzhou Key Laboratory for Science and Technology of Fragrant Rice Guangzhou 510642China

Double-cropping rice in South China continues to break the total yield record,but the yield potential of singlecropping rice is not being *** use efficiency(RUE)has been singled out as an important determinant of grain yield in many cereal ***,there is no information on whether the yield gaps in doublecropping rice involve differences in *** experiments were performed over two years to evaluate the effects of intercepted radiation(IP)and RUE on the above-ground biomass production,crop growth rate(CGR),and harvest index(HI),in four representative rice varieties,i.e.,Xiangyaxiangzhan(XYXZ),Meixiangzhan 2(MXZ2),Nanjingxiangzhan(NJXZ),and Ruanhuayoujinsi(RHYJS),during the early and late seasons of rice cultivation in South *** results revealed that grain yield in the early season was 8.2%higher than in the late *** yield advantage in the early season was primarily due to higher spikelets per panicle and above-ground biomass resulting from a higher *** spikelets per panicle in the early season were 6.5,8.3,6.9,and 8.5%higher in XYXZ,MXZ2,NJXZ,and RHYJS,respectively,than in the late *** higher early season grain yield was more closely related to RUE in the middle tillering stage(R^(2)=0.34),panicle initiation(R^(2)=0.16),and maturation stage(R^(2)=0.28),and the intercepted photosynthetically active radiation(IPAR)in the maturation stage(R^(2)=0.28),while the late season grain yield was more dependent on IPAR in the middle tillering stage(R^(2)=0.31)and IPAR at panicle initiation(R^(2)=0.23).The results of this study conclusively show that higher RUE contributes to the yield progress of early season rice,while the yield improvement of late season rice is attributed to higher radiation during the early reproductive *** allocating the RUE of double-cropping rice with high RUE varieties or adjustments of the sowing period merits further study.

关键词： grain yield radiation use efficiency double-cropping rice

Grain Yield, Quality and 2-Acetyl-1-Pyrroline of Fragrant Rice in Response to Different Planting Seasons in South China

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Phyton-International Journal of Experimental Botany 2020年第3期89卷 705-714页

作者： Leilei Kong Haowen Luo Zhaowen Mo shenggang pan Zhixia Liu Qiang Zhang Song Bai Xiangru Tang Department of Crop Science and Technology College of AgricultureSouth China Agricultural UniversityGuangzhou510642China Rice Research Institute Guangdong Academy of Agricultural SciencesGuangdong Provincial Key Laboratory of New Technology in Rice BreedingGuangzhou510640China

Climate conditions is an important factor affected the fragrant rice growth and *** order to study the effects of different planting seasons on fragrant rice performance in South China,present study was conducted with three planting seasons(early season(April to July),middle season(June to September)and late season(August to November))and three fragrant rice cultivars,‘Basmati-385’,‘Meixiangzhan-2’and‘Xiangyaxiangzhan’.The results showed that the highest grain yield and grain 2-acetyl-1-pyrroline(2-AP,key component of fragrant rice aroma)content were both recorded in late season treatment while the fragrant rice in middle season treatment produced the lowest grain yield,grain filling percentage,1000-grain weight and gain 2-AP *** highest contents of precursors(proline,pyrroline-5-carboxylic acid and 1-pyrro-line)which related to 2-AP biosynthesis were recorded in late season treatment compared with early season treatment and middle season *** highest activities of enzymes(proline dehydrogenase,pyrroline-5-carboxylic acid synthetase and ornithine transaminase)which involved in 2-AP biosynthesis were also observed in late season ***,the fragrant rice cultivars in late season possessed the lowest chalk rice rate,chalkiness as well as the highest brown rice rate,head rice and protein ***,the optimal season for fragrant rice production in South China is the late season.

关键词： 2-acetyl-1-pyrroline climate fragrant rice grain qulity yield formation

Nitrogen Deep Placement Combined with Straw Mulch Cultivation Enhances Physiological Traits,Grain Yield and Nitrogen Use Efficiency in Mechanical Pot-Seedling Transplanting Rice

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Rice science 2022年第1期29卷 89-100,I0031页

作者： LI Lin ZHANG Zheng TIAN Hua Umair ASHRAF Yousef Alhaj HAMOUD Al Aasmi ALAA TANG Xiangru DUAN Meiyang WANG Zaiman pan shenggang State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of AgricultureSouth China Agricultural UniversityGuangzhou 510642China Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural AffairsGuangzhou 510642China Department of Botany Division of Science and TechnologyUniversity of EducationLahore 54770Pakistan College of Agricultural Science and Engineering Hohai UniversityNanjing 210098China College of Water Conservancy and Civil Engineering South China Agriculture UniversityGuangzhou 510642China Key Laboratory of Key Technology for South Agricultural Machine and Equipment Ministry of EducationGuangzhou 510642China

To assess the effects of straw return coupled with deep nitrogen(N)fertilization on grain yield and N use efficiency(NUE)in mechanical pot-seedling transplanting(MPST)rice,the seedlings of two rice cultivars,i.e.,Yuxiangyouzhan and Wufengyou 615 transplanted by MPST were applied with N fertilizer at 150 kg/hm2 and straw return at 6 t/hm2 in early seasons of 2019 and *** experiment comprised of following treatments:CK(no fertilizer and no straw return),MDS(deep N fertilization and straw return),MBS(broadcasting fertilizer and straw return),MD(deep N fertilization without straw return),MB(broadcasting fertilizer without straw return).Results depicted that the MDS treatment significantly increased the rice yield by 41.69%-72.22%due to total above-ground biomass,leaf area index and photosynthesis increased by 54.70%-55.80%,38.52%-52.17%and 17.89%-28.40%,respectively,compared to the MB *** addition,the MDS treatment enhanced the total N accumulation by 37.74%-43.69%,N recovery efficiency by 141.45%-164.65%,N agronomic efficiency by 121.76%-134.19%,nitrate reductase by 46.46%-60.86%and glutamine synthetase by 23.56%-31.02%,compared to the MB *** average grain yield and NUE in both years for Yuxiangyouzhan were higher in the MDS treatment than in the MD ***,deep N fertilization combined with straw return can be an innovative technique with improved grain yield and NUE in MPST in South China.

关键词： mechanical pot-seedling transplanting nitrogen deep placement nitrogen use efficiency rice straw return

Deep placement of nitrogen fertilizer increases rice yield and nitrogen use efficiency with fewer greenhouse gas emissions in a mechanical direct-seeded cropping system

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The Crop Journal 2021年第6期9卷 1386-1396页

作者： Lin Li Hua Tian Minghua Zhang Pingshan Fan Umair Ashraf Haidong Liu Xiongfei Chen Meiyang Duan Xiangru Tang Zaiman Wang Zheng Zhang shenggang pan State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources College of AgricultureSouth China Agricultural UniversityGuangzhou 510642GuangdongChina Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of AgricultureGuangzhou 510642GuangdongChina Guangzhou Key Laboratory for Science and Technology of Fragrant Rice Guangzhou 510642GuangdongChina Key Laboratory of Key Technology for South Agricultural Machine and Equipment Ministry of EducationGuangzhou 510642GuangdongChina College of Tropical Crops Hainan UniversityHaikou 570228HainanChina Department of Botany Division of Science and TechnologyUniversity of EducationLahore 54770PunjabPakistan Hezhou Academy of Agricultural Sciences Hezhou 542800GuangxiChina School of Engineering Jiangxi Agricultural UniversityNanchang 330045JiangxiChina

Deep placement of nitrogen fertilizer is a key strategy for improving nitrogen use efficiency. A two-year field experiment was conducted during the early rice growing seasons(March–July) of 2016 and *** experimental treatments comprised two rice cultivars: Wufengyou 615(WFY 615) and Yuxiangyouzhan(YXYZ), and three N treatments: mechanical deep placement of all fertilizers as basal dose at 10 cm soil depth(one-time deep-placement fertilization, namely OTDP fertilization);manual surface broadcast(the common farmer practice) of 40% N fertilizer at one day before sowing(basal fertilizer)followed by broadcast application of 30% each at tillering and panicle initiation stages;and no fertilizer application at any growth stage as a control. One-time deep-placement fertilization increased grain yield of both rice cultivars by 11.8%–19.6%, total nitrogen accumulation by 10.3%–13.1%, nitrogen grain production efficiency by 29.7%–31.5%, nitrogen harvest index by 27.8%–30.0%, nitrogen agronomic efficiency by 71.3%–77.2%, and nitrogen recovery efficiency by 42.4%–56.7% for both rice cultivars, compared with the multiple-broadcast treatment. One-time deep-placement fertilization reduced CH4-induced global warming potential(GWP) by 20.7%–25.3%, N2O-induced GWP by 7.2%–12.3%, and total GWP by 14.7%–22.9% for both rice cultivars relative to the multiple-broadcast treatment. The activities of glutamine synthetase and nitrate reductase were increased at both panicle-initiation and heading stages in both rice cultivars following one-time deep-placement fertilization treatment. Larger leaf area index at heading stage and more favorable root morphological traits expressed as larger total root length, mean root diameter, and total root volume per hill were also observed. One-time deep-placement fertilization could be an effective strategy for increasing grain yield and nitrogen use efficiency and lowering greenhouse-gas emissions under mechanical direct-seeded cropping systems.

关键词： N placement Grain yield Nitrogen use efficiency Greenhouse gas Direct-seeded rice

不同水分和粒肥处理对香稻香气、品质和产量的影响

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灌溉排水学报 2018年第6期37卷 36-41页

作者：田华潘圣刚莫钊文段美洋唐湘如华南农业大学农学院/农业部华南地区作物栽培科学观测试验站广州510642

【目的】探索香稻适宜的水肥管理模式。【方法】以常规香稻"桂香占"和杂交香稻"培杂软香"为试验材料,采用盆栽试验,设置二因子三水平随机区组共9个处理,即水分因子设常规灌溉(维持水层1~3 cm,W0)、轻度控水灌溉(土壤水势维持在-20^-5 k ... 详细信息

【目的】探索香稻适宜的水肥管理模式。【方法】以常规香稻"桂香占"和杂交香稻"培杂软香"为试验材料,采用盆栽试验,设置二因子三水平随机区组共9个处理,即水分因子设常规灌溉(维持水层1~3 cm,W0)、轻度控水灌溉(土壤水势维持在-20^-5 k Pa,W1)和重度控水灌溉(土壤水势维持在-40^-25 k Pa,W2);粒肥因子设不施粒肥(N0)、低氮粒肥(每盆施尿素0.43 g,N1)和高氮粒肥(每盆施尿素1.08 g,N2),并以常规灌溉不施粒肥处理(W0N0)为对照,研究了9个处理对香稻香气、品质和产量的影响。【结果】轻度控水灌溉高氮粒肥处理(W1N2)香稻"桂香占"和"培杂软香"的糙米香气分别比W0N0处理显著增加了176.1%和62.3%;W1N2处理"桂香占"的精米率比W0N0处理显著提高了69.78%,但对"培杂软香"的精米率没有显著影响;W1N2处理"桂香占"和"培杂软香"的垩白粒率分别比W0N0处理显著降低了15.03%和9.45%;W1N2处理"桂香占"的总粒数和"培杂软香"的有效穗分别比W0N0处理显著提高了3.95%和24.72%;常规灌溉高氮粒肥处理(W0N2)处理"桂香占"和"培杂软香"的实际产量分别为6.85 t/hm2和6.97 t/hm2比其他各处理实际产量稍高,但各处理与W0N0处理相比没有显著差异。【结论】轻度控水灌溉高氮粒肥处理是浓香高产优质的最佳栽培措施,可在香稻的大面积和标准化种植中推广应用。

关键词：香稻水分粒肥香气品质产量

稻鸭、稻鱼共作生态系统中稻田田面水的N素动态变化及淋溶损失

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环境科学学报 2008年第10期28卷 2125-2132页

作者：李成芳曹凑贵汪金平潘盛刚叶成叶威刘铠曾金凤华中农业大学作物栽培与生理生态研究中心武汉430070 长江流域水环境监测中心武汉430010

通过田间试验研究了稻鸭、稻鱼共作复合生态系统稻季田面水及渗漏水中各形态N素的动态变化及N肥的渗漏损失量.结果表明,水稻生长期间,田面水中N素形态以NH4+-N为主,渗漏水中则以NO3--N为主要形态;施肥有利于田面水和渗漏水各形态N素含... 详细信息

通过田间试验研究了稻鸭、稻鱼共作复合生态系统稻季田面水及渗漏水中各形态N素的动态变化及N肥的渗漏损失量.结果表明,水稻生长期间,田面水中N素形态以NH4+-N为主,渗漏水中则以NO3--N为主要形态;施肥有利于田面水和渗漏水各形态N素含量的提高.相对于常规稻作处理(CK),稻鸭(RD)、稻鱼共作(RF)时田面水的pH、NH4+-N含量和TN含量显著增加,渗漏水的NO3--N和TN含量降低,而渗漏水NH4+-N无明显变化.所有处理田面水中NH4+-N/TN在施肥后第3天达到最大,随后降低;而所有处理NH4+-N/TN的均值相当.对各处理的N素淋失分析可知,处理RD与RF的肥料N潜在淋失率分别为2.72%、2.58%,低于CK处理(2.99%),表明稻鸭、稻鱼共作可以减少施入N肥潜在的下渗淋失,同时稻鱼共作减少N肥淋失的效果好于稻鸭共作.

关键词：田面水渗漏水氮素稻鸭共作稻鱼共作