Water Conservation and Nitrogen Loading Reduction Effects with Controlled and Mid-Gathering Irrigation in a Paddy Field

Li, Yuanyuan; Shao, Xin; Sheng, Zhuping; Guan, Wenlu; Xiao, Mingzhong

doi:10.15244/pjoes/61835

Cited by 15 publications

(9 citation statements)

References 16 publications

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“…As a major rice producing country, China has only 19% of the world's rice planting area but 32% of the world's rice production (FAO 2019, http://www.fao.org/faost at/zh/#data). In addition, 65% of annual agricultural water consumption in China was used to irrigate rice plants (Li, Shao, Sheng, Guan, & Xiao, 2016). Water resources play important roles in maintaining the balance of ecosystem, human survival and socioeconomic development.…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic analysis of photosynthesis‐related genes regulated by alternate wetting and drying irrigation in flag leaves of rice

Song

Feng

Das

et al. 2020

Food and Energy Security

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Alternate wetting and drying (AWD) irrigation has been widely used to replace continuous flooding (CF), which does not result in yield loss while improving water productivity. However, it is still unexplored as to how this agricultural practice would affect gene expression to control plant physiology. In this study, we found that photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), chlorophyll (Chl) content, and leaf water potential (Lwp) significantly decreased while abscisic acid (ABA) content and water use efficiency (WUE) increased when soil water potential reached to −15 kPa in the AWD irrigation regime. We then analyzed the differences between AWD and CF irrigation practices in transcriptomic profiles for flag leaves. Genes were found to be differentially expressed in photosynthesis related pathways namely, Chl biosynthesis, photosynthesis‐antenna proteins pathway, photosynthesis process, and ABA signal transduction pathway. The study provides important information on the morphological adaptations observed in the flag leaves in response to AWD irrigation, which will act as a basic framework to conduct molecular studies for improving rice cultivation.

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Section: Introductionmentioning

confidence: 99%

Transcriptomic analysis of photosynthesis‐related genes regulated by alternate wetting and drying irrigation in flag leaves of rice

Song

Feng

Das

et al. 2020

Food and Energy Security

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“…Reasonable water and fertilizer management could effectively promote rice yield [3] . Previous studies by scholars have found that water-saving irrigation techniques could improve nitrogen fertilizer absorption, and is favorable for nitrogen migration to the growth center, which could promote the rice yield [4][5][6][7] . Liu [8] found that total grains per panicle, productive panicles and thousand grain weight was not decreased obviously compared to conventional irrigation.…”

Section: Introductionmentioning

confidence: 99%

Effects of water and nitrogen coupling on growth, physiology and yield of rice

Shao

et al. 2019

International Journal of Agricultural and Biological Engineering

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Water and nitrogen fertilizer are two essential factors for quality and yield formation of rice. Experimental study was carried out to investigate the effects of water and nitrogen fertilizer coupling on yield-related factors, such as growth (height), physiological indicators (chlorophyll and leaf area index (LAI)) and yield composition indicators (productive panicles, thousand grain weight and total grains per panicle). Results showed that, the height difference under two irrigation regimes was not significant, and it showed no difference until the tillering stage (p > 0.05). The water control method for controlled and mid-gathering irrigation (CMI) was favorable for nutrients converting to rice grain. Meanwhile the height difference for CMI and conventional irrigation (CVI) was the biggest at 80 d after rice transplantation. Variance analysis showed the effect of fertilization on height was significant (p < 0.05). With organic fertilizer application, it could control plant growth and promote the nutrients converting to the panicle. The change curve of LAI was similar to chlorophyll content. Organic fertilizer application could not only promote chlorophyll content and LAI, but also delay leaf fading and promote yield. Nitrogen fertilizer factors showed significant difference on rice yield, compared to irrigation regimes showing no significance. Considering the irrigation and fertilizer factors together, the interaction was significant. The descending orders for the effects of water and nitrogen on rice yield were fertilizer, water and fertilizer, water. Regression analysis showed that the productive panicles and total grains per panicle of rice were extremely significant on rice yield, and the direct effect of total grains per panicle on yield was greater than that of productive panicle. This study results could provide theoretical basis for water and nitrogen management to improve rice production.

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“…At present, 95% of rice is produced 59 under traditional puddled transplanted conditions, which leading to consumption of 60 large amounts of fresh water. Previous studies suggest that rice production consumes 61 about 65% of total agricultural water consumption 2 . However, with the global climate 62 change, the uneven spatial-temporal distribution of precipitation has caused a severe shortage of freshwater resources, and seasonal drought stress has become a crucial abiotic factor restricting the development of traditional puddled transplanted rice production system in Central China [3][4][5] .…”

Section: Introduction 57mentioning

confidence: 99%

Physiological Mechanism of Drought-Resistant Rice Coping With Drought Stress

Wang

Yang

Cheng

et al. 2021

J Plant Growth Regul

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Drought stress is one of major threats to rice production. The weakening of leaf photosynthesis due to drought is the main reason for the reduction of grain yield, but its mechanism is still obscure. The objectives of this study were to reveal the physiological mechanism of drought stress affecting photosynthetic capacity and grain yield. Pot experiments were conducted with three rice cultivars, Hanyou113 (HY113), Huanghuazhan (HHZ) and Zhonghan3 (ZH3) under four water management treatments (traditional flooding (CK), mild drought stress (LD), moderate drought stress (MD) and 36 severe drought stress (HD)) in 2013 and 2014. Compared with CK, grain yield was 37 significantly reduced by 14.9%, 30.8% and 12.8% in HY113, HHZ and ZH3 under mild 38 drought stress, 32.9%, 33.7% and 22.9% in HY113, HHZ and ZH3 under moderate 39 drought stress and 53.6%, 45.6% and 30.7% in HY113, HHZ and ZH3 under severe drought stress, respectively. The photosynthetic rate (Pn) decreased by 49.0% from 20.0 41 to 10.2 µmol m -2 s -1 in HY113, and 67.6% from 23.4 to 7.58 µmol m -2 s -1 in HHZ, and 42 39.3% from 23.4 to 14.2 in ZH3. The Pn of HHZ was similar to that of ZH3 under CK 43 conditions. The yield reduction of drought-resistant cultivars was smaller than that of 44 conventional cultivars. Maintaining leaf water potentia (LWP), Pn, photosystem II (PSII) 45 original light energy conversion efficiency, non-photochemical quenching coefficient 46 (NPQ), and increasing in the ratio of photochemical reaction energy in fluorescence 47 and antioxidant enzyme activity, is the physiological basis to achieve a relatively high photosynthesis. These traits could be the target for breeder to developing droughttolerant varieties.

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Water Conservation and Nitrogen Loading Reduction Effects with Controlled and Mid-Gathering Irrigation in a Paddy Field

Cited by 15 publications

References 16 publications

Transcriptomic analysis of photosynthesis‐related genes regulated by alternate wetting and drying irrigation in flag leaves of rice

Transcriptomic analysis of photosynthesis‐related genes regulated by alternate wetting and drying irrigation in flag leaves of rice

Effects of water and nitrogen coupling on growth, physiology and yield of rice

Physiological Mechanism of Drought-Resistant Rice Coping With Drought Stress

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