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3 Progress of Joint Research Activities
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Research No.: ㉛ EE-7 ODA Loan Joint Research Date: Oct. 16 , 2020
1 General Title To study changes of the farming systems to support eliminate
pollutants loaded to the environment (including GHG)

2 Core Members CTU: Nguyen Huu Chiem (Leader), Nguyen Van Cong, Tran Sy Nam, Nguyen Xuan Loc,
Doan Van Hong Thien, Nguyen Thi Ha Mi
Japanese Universities:
TOYODA Koki (TUAT), TARAO Mitsunori (TUAT), HAYASHIDANI Hideki (TUAT),
TANAKA Haruo (TUAT), OIKAWA Yosei (TUAT), KOSE Ryota (TUAT), MIYANISHI Takayuki (Nagasaki)
3 Duration May 2017 – Oct. 2020 (3 years and 6 months) <Kick-off>
4 Main Objectives 1. Applicable study of potential activated biochar to absorb nutrients, agro-chemicals and GHGs emission
This study aims to (i) nitrogen and phosphorous adsorption of activated biochar from effluent of VACB model and aquaculture wastewater to eliminate
eutrophication, (ii) A common used agro-chemicals adsorption of potential activated biochar to reduce soil and water contamination in the full-dyke
systems in the Mekong delta, and (iii) reduction GHGs emission by using potential activated biochar in aquaculture and agriculture
2. Study of carbon sequestration and greenhouse gases emission from natural wetlands and paddy rice in the Mekong delta
The purpose of this study is to estimation of greenhouse gases emission and propose solutions to eliminate greenhouses gases emission from natural
wetlands and farming systems in the Mekong delta
3. Study on greenhouse gases emission reduction via biochar application from rice husk under different water management conditions
This study aims to (i) reduce greenhouse gases emission from rice farming by applying rice husk biochar and (ii) improve soil quality and rice yield
4. Synthesis of the Valuable Products from Byproducts of Agriculture by Using Green Chemistry Methods
This study aims to remove of H 2 S from biogas using supporting material of hydroxyapatite which is prepared from byproducts of agriculture
5. Study to propose suitable techniques and climate smart agriculture –CSA models for rice in the Mekong Delta
The purpose of this study is to (i) Make a list of the models which follow CSA, (ii) assess the impact of CSA models which has been applied in the
Mekong Delta (iii) Identify the CSA models to suit the actual needs of local and (iv) propose potential CSA model and extend suitable CSA models for
rice in study area
5 Focal Points 1. Applicable study of potential activated biochar to absorb nutrients,
agro-chemicals and GHGs emission

Experiment 1:Effects of Rice Husk Biochar and Calcium Experiment 2: Determination of nutrient concentrations
Amendment on Remediation of Saline Soil from Rice-shrimp
Cropping System in Vietnamese Mekong Delta absorbed by biochar

Experiment 3: Capacity of charcoal to reduce effect of pesticide fenobucarb on cholinesterase in climbing perch
2. Study of carbon sequestration and greenhouse gases emission from natural
wetlands and paddy rice in the Mekong delta (*)

3. Study on greenhouse gases emission reduction via biochar application from
rice husk under different water management conditions (*)
36 250 a
Control (100% soil)
RB1 (0,1% biochar/soil) a
RB2 (0,2% biochar/soil) 200 a b b b
RB5 (0,5% biochar/soil)
CH 4 rates emission (mgCH 4 /m 2 /day) 18 9 BB5 (0,5% biochar/soil) Total CH 4 flux (mgCH 4 /m 2 ) 150 100 c
BB1 (0,1% biochar/soil)
27
BB2 (0,2% biochar/soil)
0 50 0
D1 D5 D7 D10 D14 D21
RB1 RB2 RB5 DC BB1 BB2 BB5
Incubation time (day) Treatment
Experiment 1. CH 4 rates emission Experiment 2. Total N 2 O emission
ⓒ All Rights Reserved, Nov. 2020 (CTU) (mgCH 4 /m 2 /day) (mgN 2 O/m 2 )
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