Effects of Alternate Wetting and Drying Irrigation on Yield and Water Use Efficiency of Rice

Chu, Guang; Zhan, Ming-Fei; Zhu, Kuanyu; Wang, Zhiqin

doi:10.3724/sp.j.1006.2016.01026

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…Consistent with previous studies, JIHR cultivars had higher grain yields and higher IE N than JHR cultivars under both high and low N conditions (Tables 1 and 2; Chu et al, 2019;Wei et al, 2016Wei et al, , 2018. Although several shoot agronomic and physiological traits underlying better yield performance and higher NUE and/ or WUE of JIHR cultivars have been identified (Chu et al, 2018a;Meng et al, 2018;Wei et al, 2016Wei et al, , 2017Wei et al, , 2018. However, prior to this study, little information was available describing root morphological and physiological traits underlying better yield performance and higher NUE of JIHR cultivars under low N conditions.…”

Section: Discussionsupporting

confidence: 89%

Root morphological‐physiological traits for japonica/indica hybrid rice with better yield performance under low N conditions

Chu

Chen

et al. 2022

Food and Energy Security

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Newly bred japonica/indica hybrid rice (JIHR) cultivars might produce more grain yield and have better nitrogen‐use efficiency (NUE) under low N conditions. This study determined whether an improved root system in JIHR cultivars could benefit shoot growth, physiological processes, and thereby grain yield and NUE. Four rice cultivars, including two JIHR cultivars and two local high‐yielding japonica hybrid rice (JHR) cultivars were field‐grown under two N application levels: 120 kg ha−1 (low application of N, LN) and 180 kg ha−1 (normal application of N, NN). Grain yield and the amount of N taken up from the soil were higher in JIHR cultivars than in JHR cultivars by 12.1% and 18.1% under NN and 12.5% and 14.0% under LN, respectively. Compared with JHR cultivars, JIHR cultivars had higher N partial factor productivity (PFPN) under both N treatments and higher internal N‐use efficiency (IEN) and N harvest index only under LN treatment. Under LN treatment, JIHR cultivars had several improved root morphological and physiological traits, for instance, greater root dry weight (DW), root length density and root volume, longer root length, larger specific root length, deeper root distribution, larger root total and active absorption area, higher root oxidation activity (ROA), and concentration of zeatin (Z) plus zeatin riboside (ZR) in root‐bleeding sap, than JHR cultivars. Generally, the results suggest that improved root morphological and physiological traits might benefit shoot growth, physiological processes, and thereby grain yield and NUE for JIHR cultivars under low N conditions.

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Section: Discussionsupporting

confidence: 89%

Root morphological‐physiological traits for japonica/indica hybrid rice with better yield performance under low N conditions

Chu

Chen

et al. 2022

Food and Energy Security

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“…However, current water and NUE are low in Chinese rice production. CI can effectively enhance root growth and significantly improve rice yield and water use efficiency (Chu et al, 2016). Considering the low N uptake efficiency of rice plants caused by the highly humid climate in the Sichuan Basin and increasingly convenient fertilization brought about by the popularization of integrated water and fertilizer equipment, our research group proposed studying UN in paddy fields.…”

Section: Discussionmentioning

confidence: 99%

Do reduced water and nitrogen input in rice production necessarily reduce yield?

Shu¹,

Li²,

Tang³

et al. 2022

Int. Agrophys.

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This study explored the effects of water and nitrogen management on yields, as well as water and nitrogen use efficiency, in the production of rice (Oryza sativa L.). The study aimed to provide theoretical and technical support for high yield practices and efficient resource utilization. Three replicate splitplot experiments were conducted in the field using flooding irrigation and controlled irrigation as the primary treatments. The secondary treatments included no nitrogen application, the farmers' usual nitrogen management, optimized nitrogen treatment, and uniform nitrogen application. Uniform nitrogen achieved the highest yield (11.91-14.12 10 3 kg ha -1 ) with controlled irrigation, in which case 20% less nitrogen is applied than in the case of optimized nitrogen treatment and farmers' usual nitrogen management. Controlled irrigation + uniform nitrogen required 24.18-35.82% less irrigation than flooding irrigation. Controlled irrigation + uniform nitrogen yielded the lowest reduction (18.52-20.00%) in the dry weight of deep roots (20-30 cm) within 30 days after heading. Comparatively, this reduction was 27.54-30.26 and 38.71-42.11% under controlled irrigation + optimized nitrogen treatment and controlled irrigation + farmers' usual nitrogen management, respectively. At the heading stage, light interception was highest under uniform nitrogen. Nitrogen recovery efficiency under uniform nitrogen was 8.53-17.88 and 46.77-60.79% higher than that under optimized nitrogen treatment and farmers' usual nitrogen management, respectively. Furthermore, nitrogen use efficiency under uniform nitrogen was 19. 84-29.70 and 76.16-94.44% higher than that under optimized nitrogen treatment and farmers' usual nitrogen management, respectively, low-intensity/ high-frequency nitrogen application combined with water-saving irrigation can greatly reduce water and nitrogen input while maintaining a stable yield to achieve food security and efficient resource utilization in rice production.K e y w o r d s: rice (Oryza sativa L.), water management, nitrogen fertilizer management, water and nitrogen use efficiency, yield

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Are crop deep roots always beneficial for combating drought: A review of root structure and function, regulation and phenotyping

Zhang

Morita

et al. 2022

Agricultural Water Management

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Effects of Alternate Wetting and Drying Irrigation on Yield and Water Use Efficiency of Rice

Cited by 6 publications

References 30 publications

Root morphological‐physiological traits for japonica/indica hybrid rice with better yield performance under low N conditions

Root morphological‐physiological traits for japonica/indica hybrid rice with better yield performance under low N conditions

Do reduced water and nitrogen input in rice production necessarily reduce yield?

Are crop deep roots always beneficial for combating drought: A review of root structure and function, regulation and phenotyping

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