Faculty Profiles - EHARA Hiroshi

Papers - EHARA Hiroshi

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Diversity of salt tolerance in Vigna nakashimae, wild related species of the azuki bean (Vigna angularis) Reviewed International journal

Ogiso-Tanaka, E., Chankaew, S., Isemura, T., Marubodee, R., Kongjaimun, A., Baba-Kasai, A., Okuno, K., Ehara, H. and Tomooka, N.

Breeding Science 2024.3

Changes in photosynthetic performance and dry matter production in sago palm seedlings by the application of different nutrient levels Reviewed International coauthorship

Asano, K., Azhar, A., Audia, F., Murano, H., Naito, H., Abbas, B., Romkaew, J., Sinma, K., Makihara, D. and Ehara, H.

Tropical Agriculture and Development Vol. 67 ( 3 ) page： 90 - 97 2023.12

Growth performance of photoperiod-sensitive rice (Oryza sativa L.) varieties in different soil types under rainfed condition in Cambodia Reviewed International coauthorship International journal

Uch, C., Roeurn, S., Ro,. S., Kano-Nakata, M., Yamauchi, A. and Ehara. H.

Agriculture 2023.8

Measuring instant light response curve of chlorophyll fluorescence on sago palm (Metroxylon sagu Rottb.) leaves: Different time measurements on dark and light-adapted leaf Invited Reviewed International coauthorship

Azhar, A, Asano, K, and Ehara, H.

Planta Tropica Vol. 11 ( 1 ) 2023.4

Unique salt-tolerance-related QTLs, evolved in Vigna riukiuensis (Na+ includer) and V. nakashimae (Na+ excluder), shed light on the development of super-salt-tolerant azuki bean (V. angularis) cultivars Invited Reviewed International coauthorship

Ogiso-Tanaka, E., Chankaew, S., Yoshida, Y., Isemura, T., Marubodee, R., Kongjaimun, A., Baba-Kasai, A., Okuno, K., Ehara, H., and Tomooka, N.

Plants Vol. 12 2023.4

Ambient air temperatures and solar radiation affect OJIP fluorescence transients of coffee plants in an agroforestry system Reviewed International coauthorship International journal

Azhar, A., Merdekawati, E., Pramudia, A., Cahyo, A. N., Ehara, H. and Dahliani, L.

Agrosystems, Geosciences & Environment 2023

Efficacy of agricultural and food wastes as the growing media 2 for sunflower and water spinach microgreens production Reviewed International coauthorship International journal

Thepsilvisut, O., S., Nipawadee, Chutimanukul, P., Athinuwat, D., Chuaboon, W., Poomipan, P., Vachirayagorn, V., Pimpha, N., Chutimanukul, P. and Ehara. H.

Horticulture Vol. 9 ( 8 ) 2023

Comparison of different temperature control systems in smart greenhouses for green romaine lettuce production Reviewed International coauthorship

Kumsong, N. Thepsilvisut, O., Imorachorn, P., Chutimanukul, P., Pimpha, N., Toojinda, T., Trithaveesak, O., Ratanaudomphisut, E., Poyai, A., Hruanun, C., Yanuwong, S., Pakhamin, W., Kayoontammarong, C., Janpeng, M. and Ehara, H.

Horticulturae Vol. 9 ( 12 ) page： 1255 2023

Exogenous application of coconut water to promote growth and increase the yield, bioactive compounds, and antioxidant activity for Hericium erinaceus cultivation Reviewed International coauthorship

Chutimanukul, P., Sukdee, S., Prajuabjinda, O., Thepsilvisut, O., Panthong, S., Ehara, H. and Chutimanukul, P.

Horticulturae Vol. 9 ( 10 ) page： 1131 2023

Dipping vigorous seedling roots in phosphorus-enriched slurry at transplanting efficiently increases lowland rice yields Invited Reviewed

Rakotoarisoa, N. M., Tsujimoto, Y., Oo, A. Z., Tashiro, T., Kano-Nakata, M. and Ehara, H.

Crop and Environment Vol. 2 ( 4 ) 2023

Utilization of sensing and image-processing devices for evaluating the grain quality of Cambodian rice varieties Reviewed International coauthorship

Srun, K., Fujita, A., Kong, K., Ngin, C., Neou, R., Asano, K., Audia, F., Yamada, S., Kano-Nakata, M., Yamauchi, A., Tashiro, T. and Ehara, H.

Tropical Agriculture and Development Vol. 66 ( 4 ) page： 139 - 149 2022.12

Modeling future habitats to identify suitable sites for ex situ conservation of the endangered palm Metroxylon vitiense (H. Wendl.) H. Wendl. ex Benth. & Hook. f. in Fiji Reviewed

Akemi Itaya, Masamitsu Miyamori, Hiroshi Ehara, Hitoshi Naito, Isaac Rounds, Alivereti Naikatini, Marika Tuiwawa

Tropical Ecology Vol. 63 ( 4 ) page： 596 - 603 2022.12

Grain Yield and Gross Return above Fertilizer Cost with Parameters Relating to the Quality of White Rice Cultivated in Rainfed Paddy Fields in Cambodia Reviewed

Srun Khema, Soriya Rin, Akiko Fujita, Kea Kong, Chhay Ngin, Mana Kano-Nakata, Akira Yamauchi, Hiroshi Ehara

Sustainability Vol. 14 ( 17 ) page： 10708 - 10708 2022.9

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI AG

This study aims to compare the grain yield, gross return above fertilizer cost (GRAFC: (paddy sales)–(fertilizer cost)), and several parameters relating to the quality of white rice cultivated with different soil-specific nutrient management in 14 provinces where different soil types are distributed. The grain yield tended to increase with increased fertilizer application; however, the relationship between the fertilization rate and the yield was not linear in areas where clay soil dominates. In cases of popular varieties cultivated from the northern to southern province, the amount of fertilizer applied was up to 163 kg ha−1 (sum of N-P2O5-K2O), and the GRAFC and the fertilization rate showed a nonlinear relationship, with a peak of around 120 kg ha−1 fertilization. The nitrogen concentration recognized as a negative factor for the quality of rice tended to increase with an increasing fertilization rate, and the carbohydrate concentration and carbohydrate/protein ratio that are a positive factor for the quality were related negatively with the fertilizer rate. The amylopectin concentration in white rice was positively related with the carbohydrate concentration, which decreased with an increasing fertilization rate. The levels of fertilizer application required to achieve a higher yield, GRAFC, and the maintenance and improvement of parameters relating to grain quality were different.

DOI： 10.3390/su141710708

Web of Science

Scopus

Waterlogged Conditions Influence the Nitrogen, Phosphorus, Potassium, and Sugar Distribution in Sago Palm (Metroxylon sagu Rottb.) at Seedling Stages. Reviewed International journal

Aidil Azhar, Koki Asano, Daisuke Sugiura, Mana Kano-Nakata, Hiroshi Ehara

Plants (Basel, Switzerland) Vol. 11 ( 5 ) 2022.3

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

Sago palm (Metroxylon sagu Rottb.) grows in well-drained mineral soil and in peatland with high groundwater levels until complete submersion. However, the published information on nutrient uptake and carbohydrate content in sago palms growing under waterlogging remains unreported. This experiment observed sago palm growth performance under normal soil conditions (non-submerged conditions) as a control plot and extended waterlogged conditions. Several parameters were analyzed: Plant morphological growth traits, nitrogen, phosphorus, potassium, and sugar concentration in the plant organ, including sucrose, glucose, starch, and non-structural carbohydrate. The analysis found that sago palm morphological growth traits were not significantly affected by extended waterlogging. However, waterlogging reduced carbohydrate levels in the upper part of the sago palm, especially the petiole, and increased sugar levels, especially glucose, in roots. Waterlogging also reduced N concentration in roots and leaflets and P in petioles. The K level was independent of waterlogging as the sago palm maintained a sufficient level in all of the plant organs. Long duration waterlogging may reduce the plant's economic value as the starch level in the trunk decreases, although sago palm can grow while waterlogged.

DOI： 10.3390/plants11050710

Web of Science

Scopus

PubMed

Identification of differentially expressed transcripts for trunk formation in sago palm using annealing control primer GeneFishing technique Reviewed

Hussain Hasnain, Edward-Atit Anastasia Shera, Julaihi Norzainizul, Tommy Rina, Nisar Mehvish, Hamdan Nurhazlina, Ehara Hiroshi

Journal of Applied Biology and Biotechnology Vol. 10 ( 2 ) page： 21 - 34 2022.2

Effect of chicken manure and chemical fertilizer on the yield and qualities of white mugwort at dissimilar harvesting times Reviewed

Ornprapa Thepsilvisut, Preuk Chutimanukul, Sudathip Sae-Tan, Hiroshi Ehara

PLOS ONE Vol. 17 ( 4 ) page： e0266190 - e0266190 2022

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Public Library of Science (PLoS)

One of the key components that affects soil productiveness, plant growth, and crop quality is fertilization. The effect of fertilizer, both organic and chemical, on the extremely acidic (pH 4.10) sandy loam soil chemical properties, yield, and quality of white mugwort grown were evaluated in this study. The field experiment arranged in a randomized complete block design, with four replications was conducted in Prachin Buri province, Thailand. There were six treatments, no fertilization (control), chemical fertilizer (25-7-7 + 46-0-0) applied at 187.50 (66.56 N:6.77 P2O5:6.77 K2O kg ha-1) kg ha-1 and applied at 375.00 (133.12 N:13.13 P2O5:13.13 K2O kg ha-1) kg ha-1, chicken manure applied at 3.36, 6.72, and 10.08 t ha-1. After harvesting, application of chicken manure tended to increase soil organic matter compared to the control, however, the application of chemical fertilizer did not show the same effect. The fresh weight of white mugwort increased with the rise in both fertilizer levels. Chicken manure application at 10.08 t ha-1 produced the highest fresh weight at all times. The level of accumulated nitrate was significantly greater when fertilizer rates increased. In addition, the total phenolic content of the white mugwort fertilized with chicken manure was higher than that fertilized with chemical fertilizer. However, there was no association between the DPPH radical scavenging capacity at harvesting times and different fertilization. Based on the results, chicken manure applied at 10.08 t ha-1 gave the best yield and higher total phenolic content of white mugwort, which was probably due to the improved soil organic matter.

DOI： 10.1371/journal.pone.0266190

Web of Science

Scopus

PubMed

Detection of Suitable Wetlands for Paddy Field Harvesting of Taro (Colocasia esculenta) to Minimize Damage Caused by Taro Beetles (Papuana uniondis) on Gau Island, Fiji

MIYAMOTO Kana, ITAYA Akemi, NAKASHIMA Chiharu, MISHIMA Takashi, TOKUDA Hiromi, YOSHIMATSU Takao, EHARA Hiroshi

Tropical Agriculture and Development Vol. 66 ( 2 ) page： 64 - 72 2022

Language：English Publishing type：Research paper (scientific journal) Publisher：Japanese Society for Tropical Agriculture

Taro beetle damage has recently been reported on Gau Island, Fiji, causing economic loss for the taro business. This significantly reduced farmers’ incomes and the cultural value of taro. Swamp taro cultivation is expected to be a solution to taro beetle damage. Even though studies investigating the mitigation of taro beetle damage in paddy fields are not common, taro beetles do not have the ability to go beyond a certain depth in muddy condition. This study investigated suitable wetlands for taro cultivation by using the topographic wetness index (TWI). The calculation also considered protection forest zones and accessibility as analyzed by RapidEye satellite images, normalized difference vegetation index (NDVI), and buffer function. Results showed that 26.03% of the island’s mass has potential for the development of paddy fields. Although the result was larger than predicted, there are differences between potential areas for each village. However, these areas were more than double size of the existing farmland of each village. Estimated yields corresponding to the potential areas were also presented in the study; these indicated that more than half of villages might be able to yield more than 0.50 t of taro production.

DOI： 10.11248/jsta.66.64

CiNii Research

Comparison of growth and ion absorption with compatible solute accumulation of three wild Vigna species under salt stress Reviewed

Yoshida, J., Tomooka, N., Mishima, T., Matsuda, Y. and Ehara, H.

Tropical Agriculture and Development Vol. 65 ( 4 ) page： 194 - 205 2021.12

Arbuscular mycorrhizal communities in the roots of sago palm in mineral and shallow peat soils Reviewed International coauthorship International journal

Asano, K., Kagong, W. V. A., Mohammad, S. M. B., Sakazaki, K., Talip, M. S. B. H. A., Sahmat, S. S., Yok, M. C. K., Isoi, T., Nakata-Kano, M. and Ehara, H.

Agriculture Vol. 11 ( 11 ) 2021.12

Response and resilience of Asian agrifood systems to COVID-19: An assessment across twenty-five countries and four regional farming and food systems Reviewed International coauthorship International journal

John M. Dixon, Jeevika Weerahewa, Jon Hellin, Maria Fay Rola-Rubzen, Jikun Huang, Shalander Kumar, Anup Das, Muhammad Ejaz Qureshi, Timothy J. Krupnik, Kamil Shideed, Mangi L. Jat, P.V. Vara Prasad, Sudhir Yadav, Aamer Irshad, Abdybek Asanaliev, Aigul Abugalieva, Aziz Karimov, Basundhara Bhattarai, Carol Q. Balgos, Fred Benu, Hiroshi Ehara, Jharendu Pant, Jon M.P. Sarmiento, Jonathan C. Newby, Jules Pretty, Hiromi Tokuda, Horst Weyerhaeuser, Larry N. Digal, Lingling Li, Md. Abdur Rouf Sarkar, Md. Zihadul Abedin, Pepijn Schreinemachers, Quentin Grafton, Ram C. Sharma, Saidjamol Saidzoda, Santiago Lopez-Ridaura, Shuan Coffey, Suan Pheng Kam, Su Su Win, Suwanna Praneetvatakul, Tek Maraseni, Van Touch, Wei-li Liang, Yashpal Singh Saharawat, Jagadish Timsina

Agricultural Systems Vol. 193 page： 103168 - 103168 2021.10

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Papers - EHARA Hiroshi