Article
Environmental Sciences
Hironori Arai
Summary: By altering the water regime of the cropping period, it is possible to reduce greenhouse gas emissions and increase rice yield in triple rice cropping systems. The potential of emission reduction may have been underestimated in previous studies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biotechnology & Applied Microbiology
Dung Duc Tran, Edward Park, Thong Anh Tran, Thang Tat Vo, Phong Thanh Le
Summary: The trade-offs between socio-economic growth and environmental protection in the floodplains of the Vietnamese Mekong Delta have led to the degradation of ecosystems and changes in socio-economic patterns. This study assesses the interconnection between socio-economic development and rice-based agricultural production, highlighting the pros and cons of different farming systems. The results emphasize the need for local governments to address the drivers of environmental degradation in agriculture and consider sustainable development pathways.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Agronomy
Nguyen Thanh Binh, Le Van Thuy Tien, Luu Thi Tang, Nguyen Minh Tu, Tran Duc Dung, Nguyen Hong Quan
Summary: Floodplains play a crucial role in agricultural development and rural livelihoods in the Vietnamese Mekong Delta. The intensive rice production area has undergone significant changes in its water management regime. Different innovative water management practices have been implemented, but each has its pros and cons, with intensive practices being less resilient in social, environmental, and ecological aspects. These findings provide valuable lessons for rice-producing deltas worldwide in adapting to global challenges.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Environmental Sciences
Nguyen Dinh Giang Nam, Nguyen Thanh Giao, Minh N. Nguyen, Nigel K. Downes, Nguyen Vo Chau Ngan, Le Hoang Hai Anh, Nguyen Hieu Trung
Summary: An assessment was conducted on the density, species composition, and dynamics of phytoplankton in a combined rice-shrimp culture system in the Vietnamese Mekong delta. The results showed high phytoplankton diversity and good water quality. Cluster analysis revealed three distinct periods of phytoplankton density variation, with different dominant species observed at each stage. These findings provide important information on the phytoplankton assemblages in a typical rice-shrimp culture.
Article
Agronomy
Dung Duc Tran, Loc Ho Huu, Long Phi Hoang, Tien Duy Pham, Au Hai Nguyen
Summary: The study points out that the Vietnamese government has started to focus on the long-term sustainability of agriculture, proposing new development directions, but in practice, this shift may be influenced by some farmers' concerns about their traditional planting system and livelihood security.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Environmental Sciences
Xi Chen, Shihong Yang, Jie Ding, Zewei Jiang, Xiao Sun
Summary: The study finds that the addition of biochar during the rice growing season can promote rice growth and increase yield, especially under water-saving irrigation conditions. The growth and yield of rice are influenced by irrigation water management, and the application of biochar can significantly improve irrigation water use efficiency in rice paddies.
Article
Agronomy
Kristian Johnson, Thuong Ti Bach Vo, Duong Van Nha, Folkard Asch
Summary: A study on the effect of alternate wetting and drying (AWD) in rice production in the Vietnamese Mekong Delta (VMD) showed that AWD has the potential to reduce greenhouse gas emissions and freshwater use during the dry season. However, it also led to a significant yield reduction of 7% on average across all varieties. The study highlights the importance of adapting AWD to both environmental conditions and genotype for successful implementation.
JOURNAL OF AGRONOMY AND CROP SCIENCE
(2023)
Article
Agronomy
Primitiva Andrea Mboyerwa, Kibebew Kibret, Peter W. Mtakwa, Abebe Aschalew
Summary: The study found that using alternate wetting and drying irrigation method significantly improved water productivity and reduced water consumption, leading to increased rice yields. Additionally, the combination of 60 kg/ha nitrogen fertilizer application was identified as the optimal management strategy, as it lowers costs and increases net income.
Article
Environmental Sciences
Van Pham Dang Tri, Lizzie Yarina, Hong Quan Nguyen, Nigel K. Downes
Summary: The Vietnamese Mekong Delta, shaped by past policy aspirations and extensive water infrastructures, is a significant food producing landscape in Southeast Asia. However, these changes have also created new environmental risks by transforming the hydrological system. This focus review provides an overview of recent scientific findings, exploring the changing management of water resources and its inter-relationship with land use, policy, socio-economic transitions, and global environmental crises. The article highlights the compound and systemic risks faced by the delta and emphasizes the need for sharable analysis-ready data and innovations to ensure a sustainable and resilient future.
WILEY INTERDISCIPLINARY REVIEWS-WATER
(2023)
Article
Economics
Alice Joan G. C. Ferrer, Le Ha Thanh, Nguyen Tuan Kiet, Pham Hong Chuong, Vu Thu Trang, Jinky C. Hopanda, Benedict Mark Carmelita, Sridhar Gummadi, Eisen Bernard Bernardo
Summary: The study examined the effects of adjusting the cropping calendar on the welfare of rice farming households in the Mekong River Delta of Vietnam. The findings suggest that early planting can increase rice yield and income for farmers.
ECONOMIC ANALYSIS AND POLICY
(2022)
Article
Environmental Sciences
Tran Thi Kim Hong, Nguyen Thanh Giao
Summary: The study assessed surface water quality in the upstream region of the Vietnamese Mekong Delta using different statistical approaches. It found that surface water quality was deteriorated by organic matters, nutrients, and microorganisms, with urban areas showing higher pollution levels. The study also identified coliform as the leading factor controlling water quality and recommended reducing the number of sampling sites for cost reduction. Urgent actions are needed to mitigate coliform pollution in smaller water bodies.
Review
Environmental Sciences
Ho Huu Loc, Mindy Low Lixian, Edward Park, Tran Duc Dung, Sangam Shrestha, Yong-Jin Yoon
Summary: This study focuses on the impact of climate change on Vietnam's successful economic reforms, particularly its rice-centered agriculture. The emergence of adaptive livelihood models, such as prawn rice rotational crop, is noted, but there is a lack of research on their sustainability, especially regarding environmental and social aspects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Le Canh Bich Tho, Le Canh Dung, Chieko Umetsu
Summary: The 1M5R program, certified by the Vietnam Ministry of Agriculture and Rural Development in 2013, aims to promote best management practices in lowland rice cultivation. Adoption of the 1M5R technique is found to reduce production costs, increase selling prices, and boost profits for farmers, without necessarily increasing rice yield.
SUSTAINABLE PRODUCTION AND CONSUMPTION
(2021)
Article
Agronomy
Qiu Haonan, Wang Jie, Yang Shihong, Jiang Zewei, Xu Yi
Summary: This study reviewed 56 articles collected from 2000 to 2022 to analyze the water use efficiency (WUE) of rice and the factors influencing it worldwide. The results showed that most countries have low WUE in rice, with Thailand having the lowest WUE and Bangladesh having the highest. Different water-saving irrigation techniques can increase WUE and reduce irrigation water input compared to flood irrigation. Recommended water-saving irrigation technologies vary based on annual rainfall, and implementing these techniques can save a significant amount of irrigation water in Asia. To promote water-saving irrigation, countries need to formulate policies, raise farmers' awareness, and provide training and financial support.
JOURNAL OF AGRONOMY AND CROP SCIENCE
(2023)
Article
Agriculture, Multidisciplinary
Le Canh Bich Tho, Chieko Umetsu
Summary: This study examines the technical efficiency of rice smallholders in the Mekong Delta and its determinants, including farm size. The findings indicate that small farm size and fragmented land are constraining agricultural development in the region. Expanding farm size and reducing input usage could improve efficiency levels. It is recommended that small farms adopt collective farming models and eco-friendly farming practices to achieve economies of scale and reduce waste. Additionally, the government should replicate and monitor climate smart agriculture programs to improve the overall efficiency of the rice sector and protect the environment and natural resources.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Agronomy
Aung Zaw Oo, Shigeto Sudo, Tamon Fumoto, Kazuyuki Inubushi, Keisuke Ono, Akinori Yamamoto, Sonoko D. Bellingrath-Kimura, Khin Thuzar Win, Chellappan Umamageswari, Kaliappan Sathiya Bama, Marimuthj Raju, Koothan Vanitha, Palanisamy Elayakumar, Venkatachalam Ravi, Vellaisamy Ambethgar
Article
Soil Science
Hidetoshi Taira, Junya Baba, Satoshi Togashi, Jollibekov Berdiyar, Miwa Yashima, Kazuyuki Inubushi
Summary: Precipitation in Uzbekistan is limited, leading to widespread irrigation in local agriculture. However, inadequate drainage systems during irrigation result in soil salinization. Cyanobacteria, with their salt-tolerant and nitrogen-fixing abilities, have shown potential for bioremediation of salt-affected soil. Isolated cyanobacteria from Uzbekistan have demonstrated high tolerance to salinity, offering a promising solution for restoring degraded soils in the region.
NUTRIENT CYCLING IN AGROECOSYSTEMS
(2021)
Review
Forestry
Hironori Arai, Kazuyuki Inubushi, Chih-Yu Chiu
Summary: Mangrove forests play a significant role in carbon sequestration, but their impact on methane emissions is still controversial, likely influenced by environmental changes, exposure to oxygen, and anthropogenic impacts. Protecting ecosystems is crucial in reducing CH4 emissions and evaluating emission status.
Article
Plant Sciences
Hideo Azuma, Shigeru Takahashi, Naoto Kato, Kazuyuki Inubushi
Summary: Paddy soils are the main nitrogen source for rice cultivation, and understanding the available nitrogen (AN) in soil is crucial for rice production. This study investigated the relationship between soil moisture content and AN in different soil types in Japan. The results showed a positive correlation between mass water content after harvest and AN. Treatment with organic matter application or paddy-upland rotation was found to increase the AN content. Furthermore, the study also examined the year-to-year variation in soil moisture content in paddy fields of various soil types.
SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Plant Sciences
Haruka Shigeta, Kinuko Nakayama, Kazuyuki Inubushi, Miwa Matsushima Yashima, Mitsuru Sakamoto
Summary: This study aimed to investigate the effects of deer disturbance on nitrogen dynamics, including N-2 fixation and denitrification in Ozegahara Mire. Results showed that deer disturbance decreased N-2 fixation activity, with temperature having a significant impact on the activity. Mechanical disturbance by deer enhanced mineralization of organic N to suppress N-2 fixation, indicating a marked influence of deer disturbance on N-2 fixation and denitrification activities in the peat soils of the mire.
SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Plant Sciences
Janos Katai, agnes Z. Olah, Magdolna Tallai, Imre Vago, Andrea Ballane Kovacs, Aron Beni, Yuhua Kong, Yuri S. Miyairi, Makiba Sato, Mirai Watanabe, Miwa M. Yashima, Kazuyuki Inubushi
Summary: This comparative investigation aimed to evaluate controlling factors for the changes of chemical and microbial properties in soils taken from chemical fertilizer experiments carried out mainly in Chernozem and Andosol in Hungary and Japan, respectively. Results showed that land-use and chemical fertilization had a more significant impact on the stock of organic matter and soil microbiological processes in the Hungarian long-term experiments compared to the Japanese experiments, while climate conditions and human activity had important impacts on the C and N cycles of the soil-plant-atmosphere system.
SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Plant Sciences
Makiba Sato, Magdolna Tallai, Andrea Ballane Kovacs, Imre Vago, Janos Katai, Miwa Yashima Matsushima, Shigeto Sudo, Kazuyuki Inubushi
Summary: CCFM is a mixed compost fertilizer registered in Japan, which combines compost with chemical fertilizer. It is odorless, easy to handle, and has controllable nutrient content, making it beneficial for organic farming. In experiments conducted using CCFM, it was found to enhance soil-carbon storage with lower greenhouse gas emissions and promote plant growth, especially in Andosol soils. Further studies are needed for long-term experiments with different crops to confirm its sustainability.
SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Plant Sciences
Kinuko Nakayama, Kazuyuki Inubushi, Miwa Matsushima Yashima, Mitsuru Sakamoto
Summary: The study found that disturbance by Sika deer in Ozegahara Mire affected the physicochemical properties of the soil and greenhouse gas emissions, such as CO2 and CH4. Browsing and digging by Sika deer resulted in mineralization of organic matter, higher NH4+ nitrogen concentrations in the soil, and lower CO2 and CH4 fluxes compared to undisturbed areas. Negative correlation was found between CO2 emissions and groundwater levels, highlighting the importance of groundwater level in greenhouse gas fluxes.
SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Plant Sciences
Kazuyuki Inubushi, Yutaro Kakiuchi, Chiaki Suzuki, Makiba Sato, Silvio Yoshiharu Ushiwata, Miwa Yashima Matsushima
Summary: Biodegradable plastics have significant effects on soil, greenhouse gas production, and plant growth, with the specific impacts depending on the type of plastic and timing.
SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Environmental Sciences
Hironori Arai, Thuy Le Toan, Wataru Takeuchi, Kei Oyoshi, Tamon Fumoto, Kazuyuki Inubushi
Summary: In this study, a new multiscale data assimilation technique is developed using ALOS-2 PALSAR-2 L-band SAR data to estimate the spatiotemporal dynamics of field water levels. The results show promising applications for monitoring paddy field water levels and informing irrigation practices.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Ecology
Yuhong Li, Hongzhao Yuan, Anlei Chen, Mouliang Xiao, Yangwu Deng, Rongzhong Ye, Zhenke Zhu, Kazuyuki Inubushi, Jinshui Wu, Tida Ge
Summary: Elevated CO2 and N fertilization during the rice growing season have a legacy effect on the subsequent mineralization and retention of rhizodeposits in paddy soils after harvest, with varying effects among different soil aggregates.
SOIL ECOLOGY LETTERS
(2022)
Article
Plant Sciences
Kazuyuki Inubushi
Summary: The 2030 Agenda aims to eradicate poverty and achieve a more sustainable world through the Sustainable Development Goals (SDGs). Soil science plays a crucial role in achieving the SDGs, especially in paddy fields and wetlands, by predicting soil fertility and effective environmental management practices through methods like nitrogen mineralization analysis, soil microbial analysis, and greenhouse gas measurements.
SOIL SCIENCE AND PLANT NUTRITION
(2021)
Proceedings Paper
Agronomy
Nur Aina, St Fatmah Hiola, Yusminah Hala, Yasser Abd Djawad, Neni Iriany, Andi Takdir Makkulawu, Kazuyuki Inubushi, Oslan Jumadi
INTERNATIONAL CONFERENCE ON SUSTAINABLE CEREALS AND CROPS PRODUCTION SYSTEMS IN THE TROPICS
(2020)