The effect of sulfur fertilization on rice yields and nitrogen use efficiency in a floodplain ecosystem of northern Ghana

Tsujimoto, Yasuhiro; Inusah, Baba I. Y.; Katsura, Keisuke; Fuseini, Abraham; Dogbe, Wilson; Zakaria, Alhassan I.; Fujihara, Yoichi; Oda, Masato; Sakagami, Jun‐Ichi

doi:10.1016/j.fcr.2017.06.030

Cited by 20 publications

(12 citation statements)

References 27 publications

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“…1). The positive effects of suitable N and S ratios on growth and biomass accumulation was coincident with previous reports in other medicinal and crop plants (Salvagiotti et al 2009, Tsujimoto et al 2017, Raza et al 2018. The reason might be an enhanced nitrogen use efficiency (Salvagiotti and Miralles 2008).…”

Section: Discussionsupporting

confidence: 88%

Growth, secondary metabolism, and related gene expression in response to interactions of nitrogen and sulfur in Isatis indigotica

Miao¹,

Qu²,

Sha³

et al. 2019

Biol. plant.

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Nitrogen and sulfur are major elements influencing plant growth and production of secondary metabolites. They interact to each other, but little is known about it in Isatis indigotica Fort. plants. In this study, 15 different treatments representing all possible combinations of 3 N treatments (N1, N2, and N3, corresponding to 5, 15, and 25 mM N, respectively) and five S treatments (S0, S1, S2, S3, and S4, corresponding to 0.00, 1.25, 2.50, 5.00 and 7.50 mM S, respectively) were used, and plant growth, indigo and indirubin yields, and expressions of genes encoding enzymes involved in N and S metabolisms were measured. The results show that the highest dry biomass was observed in N2S2 treatment. Moreover, net photosynthetic rate in the N2S2 treatment was significantly higher than under other treatments (except for N3S2 treatment). A low nitrogen concentration (5 mM) was beneficial to the accumulation of alkaloids, and the N1S1 and N2S2 treatments resulted in the highest yields of indigo and indirubin, respectively. Additionally, the yields of indigo and indirubin were positively correlated with the expression of APS reductase and glutamine synthetase genes, respectively.Additional key words: indigo, indirubin, photosynthetic rate, RT-qPCR, stomatal conductance, transpiration rate.

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Section: Discussionsupporting

confidence: 88%

Growth, secondary metabolism, and related gene expression in response to interactions of nitrogen and sulfur in Isatis indigotica

Miao¹,

Qu²,

Sha³

et al. 2019

Biol. plant.

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“…Many investigators have noted that various types of macro-and micro-nutrient deficiencies, such as S, Si, and zinc (Zn), can inhibit AE N for rice production in the 'very poor soils' of SSA (e.g., Bado, Djaman & Valère, 2018;Tsujimoto et al, 2013Tsujimoto et al, , 2014Buri, Masunaga & Wakatsuki, 2000; Figure 3, Table 1). Three-year field experiments demonstrated that AE N could be nearly doubled, that is, from 13 to 23, by simply applying S to floodplain lowlands in northern Ghana (Tsujimoto et al, 2017). In subsequent on-farm trials under farmers' management practices, AE N values were also largely increased from 7 to 13 by applying S fertilizer (unpublished).…”

Section: Deficiencies In Macro-and Micro-nutrients Apart From N P Amentioning

confidence: 99%

Challenges and opportunities for improving N use efficiency for rice production in sub-Saharan Africa

Tsujimoto

Rakotoson

Tanaka

et al. 2019

Plant Production Science

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100

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In sub-Saharan Africa (SSA), rice production from smallholder farms is challenged because of a lack of fertilizer inputs and nutrient-poor soils. Therefore, improving nutrient efficiency is particularly important for increasing both fertilizer use and rice yield. This review discusses how to improve the return from fertilizer input in terms of agronomic N use efficiency (AE N), that is, the increase in grain yield per kg of applied N, for rice production in SSA. The AE N values we summarized here revealed large spatial variations even within small areas and a certain gap between researcher-led trials and smallholder-managed farms. Experimental results suggest AE N can be improved by addressing spatial variations in soil-related factors such as P, S, Zn, and Si deficiencies and Fe toxicity in both irrigated and rainfed production systems. In rainfed production systems, differences in small-scale topography are also important which affects AE N through dynamic changes in hydrology and variations in the contents of soil organic carbon and clay. Although empirical evidence is further needed regarding the relationship between soil properties and responses to fertilizer inputs, recent agricultural advances have generated opportunities for integrating these micro-topographical and soil-related variables into field-specific fertilizer management. These opportunities include UAV (unmanned aerial vehicle) technology to capture microtopography at low cost, database on soil nutrient characteristics at high resolution and more numbers of fertilizer blending facilities across SSA, and interactive decision support tools by use of smartphones on site. Small-dose nursery fertilization can be also alternative approach for improving AE N in adverse field conditions in SSA.

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“…JARQ 52 (3) 2018 K. Katsura et al are growing expectations for more widespread use of non-utilized floodplain areas for agricultural production (Tsujimoto et al 2017). Even though floodplains pose problems for crop production, such as the potential for submergence damage (Manzanilla et al 2011, Dar et al 2013, the utilization of floodplains for rice production is highly anticipated in West Africa (Buri et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Spatial Variation in Surface Soil Total Carbon and Its Relationship with Soil Color in a River Floodplain Ecosystem of Northern Ghana

Katsura

Watanabe

Moritsuka

et al. 2018

JARQ

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The effect of sulfur fertilization on rice yields and nitrogen use efficiency in a floodplain ecosystem of northern Ghana

Cited by 20 publications

References 27 publications

Growth, secondary metabolism, and related gene expression in response to interactions of nitrogen and sulfur in Isatis indigotica

Growth, secondary metabolism, and related gene expression in response to interactions of nitrogen and sulfur in Isatis indigotica

Challenges and opportunities for improving N use efficiency for rice production in sub-Saharan Africa

Spatial Variation in Surface Soil Total Carbon and Its Relationship with Soil Color in a River Floodplain Ecosystem of Northern Ghana

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