Root growth dynamics and yield responses of rice (Oryza sativa L.) under drought—Flood abrupt alternating conditions

Huang, Jie; Hu, Tiesong; Yasir, Muhammad; Gao, Yun; Chen, Can; Zhu, Rui; Xin, Wang; Yuan, Haibing; Yang, Jiwei

doi:10.1016/j.envexpbot.2018.09.018

Cited by 46 publications

(21 citation statements)

References 49 publications

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“…There was a significant negative correlation between root traits (root DW, RLD, RSA) and SARs (SAR-N, SAR-P and SAR-K; Table 4). This view that small root systems under transient soil moisture do not limit the absorption capacity of roots has also been confirmed in many previous reports [31,39,74,75]. Moreover, according to the correlation analysis (Table 4), root plasticity did not seem to affect the final total N, total P and total K contents at maturity.…”

Section: Influence Of Root Plasticity On N P and K Uptake And Utilizationsupporting

confidence: 86%

Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice

Huang

et al. 2021

Agronomy

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The frequent occurrence of drought–flood abrupt alternation (DFAA) in Huaibei Plain has shown a great impact on local rice production. Pot experiments were performed in 2016–2018 to investigate the effects of co-occurring drought and flooding stresses on dry weight (DW), grain yield, nitrogen (N), phosphorus (P) and potassium (K) uptake and use efficiencies (NUE, PUE and KUE) in rice. The results showed that DFAA changed the accumulation of biomass and nutrients among different organs in rice. Compared with control, DFAA significantly reduced the grain yield (−29.8%) and root DW (−30.0%), but increased the DW in stem and leaf (10.2% and 9.7%). The root/shoot ratio and morphological size of the root system in DFAA-treated plants was smaller than those of drought alone and flooding alone. Under DFAA stresses, the specific absorption rate of N, P and K increased significantly (47.9%, 31.8% and 32.8%, respectively), while NUE, PUE and KUE decreased significantly (−27.9%, −10.8% and −19.7%, respectively). The decrease of nutrient use efficiencies was mainly due to the redundant growth of branches and leaves, and the key factor limiting grain yield under DFAA conditions was the effective utilization of N. Compared with the earlier drought, the subsequent flooding might have more influence on rice growth, nutrient utilization and yield formation, but the interaction of the two weakened the cumulative effect of drought and flooding. These findings provide a scientific basis for establishing a nutrient and water management system of rice cultivation under transient soil moisture conditions.

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Section: Influence Of Root Plasticity On N P and K Uptake And Utilizationsupporting

confidence: 86%

Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice

Huang

et al. 2021

Agronomy

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“…Apart from environmental factors, the number of grains per panicle of a variety is also influenced by genitives factors where the variety has different filled grain per panicle. Drought and flood affect the percentage of filled grain in rice, depended on the degrees of drought and flooding [10].…”

Section: Number Of Filled Grain Per Paniclementioning

confidence: 99%

Adaptation of Situ Bagendit, Rindang 1 and Rindang 2 Varieties in Shallow Swamp Ogan Komering Ilir District South Sumatera

Karman¹,

Suparwoto²,

Waluyo³

2021

E3S Web Conf.

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Shallow swamps can be used for rice production during the dry season. The problem that occurs is lack of water. The technology needed to overcome these problems is drought tolerant superior varieties. The purpose of this study is to obtain superior varieties tolerant to drought on shallow lebak swampy. The study was conducted from April 2019 to August 2019. The varieties used were Situ bagendit, Rindang 1, Rindang 2, and the Siam (local) as comparison. Data collected included: plant height, number of productive tillers, number of grains per panicle, number of filled grains per panicle, number of empty grains per panicle and production. The method used is direct observation in the field. The data obtained were compiled by tabulation and analyzed by statistical tests namely the similarity test of the middle value (t-test). The results showed that the varieties Situ Bagendit, Rindang 1, and Rindang 2 had better numbers of productive tillers, number of grains per panicle, and number of filled grains per panicle than Siam varieties. The highest production was achieved by the Situ Bagendit variety, namely 4.6 tonnes/ha. Meanwhile, the production of Rindang 2, Rindang 1, and Siam varieties were 4.4; 4.0; and 2.0 tonnes/ha.

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“…In addition, the PSM mediated P cycling has been revealed under individual drought events ( Preece et al, 2020 ; Püschel et al, 2021 ), individual flood events ( Bai et al, 2019 ; Bao et al, 2019 ), or the drying-rewetting process ( Brödlin et al, 2019 ; Gao et al, 2020 ), while few on DFAA. What’s more, many studies have addressed the negative impacts of DFAA on agricultural production ( Huang et al, 2019 ; Xiong et al, 2020 ). Therefore, it is necessary to reveal the responses of PSM mediated P cycling to DFAA in agroecosystems, especially in topsoil layers.…”

Section: Introductionmentioning

confidence: 99%

Responses of Phosphate-Solubilizing Microorganisms Mediated Phosphorus Cycling to Drought-Flood Abrupt Alternation in Summer Maize Field Soil

Weng

Yan

et al. 2022

Front. Microbiol.

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Soil microbial communities are essential to phosphorus (P) cycling, especially in the process of insoluble phosphorus solubilization for plant P uptake. Phosphate-solubilizing microorganisms (PSM) are the dominant driving forces. The PSM mediated soil P cycling is easily affected by water condition changes due to extreme hydrological events. Previous studies basically focused on the effects of droughts, floods, or drying-rewetting on P cycling, while few focused on drought-flood abrupt alternation (DFAA), especially through microbial activities. This study explored the DFAA effects on P cycling mediated by PSM and P metabolism-related genes in summer maize field soil. Field control experiments were conducted to simulate two levels of DFAA (light drought-moderate flood, moderate drought-moderate flood) during two summer maize growing periods (seeding-jointing stage, tasseling-grain filling stage). Results showed that the relative abundance of phosphate-solubilizing bacteria (PSB) and phosphate-solubilizing fungi (PSF) increased after DFAA compared to the control system (CS), and PSF has lower resistance but higher resilience to DFAA than PSB. Significant differences can be found on the genera Pseudomonas, Arthrobacter, and Penicillium, and the P metabolism-related gene K21195 under DFAA. The DFAA also led to unstable and dispersed structure of the farmland ecosystem network related to P cycling, with persistent influences until the mature stage of summer maize. This study provides references for understanding the micro process on P cycling under DFAA in topsoil, which could further guide the DFAA regulations.

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Root growth dynamics and yield responses of rice (Oryza sativa L.) under drought—Flood abrupt alternating conditions

Cited by 46 publications

References 49 publications

Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice

Interactive Effects of Drought–Flood Abrupt Alternation on Morpho-Agronomic and Nutrient Use Traits in Rice

Adaptation of Situ Bagendit, Rindang 1 and Rindang 2 Varieties in Shallow Swamp Ogan Komering Ilir District South Sumatera

Responses of Phosphate-Solubilizing Microorganisms Mediated Phosphorus Cycling to Drought-Flood Abrupt Alternation in Summer Maize Field Soil

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