Mitigation of greenhouse gas emission from a double rice field of - - PowerPoint PPT Presentation

Mitigation of greenhouse gas emission from a double rice field of China

Xiaobo Qin, Yu’e Li, Yunfan Wan, Jianling Li,Bin Wang 18 Sept 2015

Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences IEDA, CAAS

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In this talk

• Stock-take
• Research updates
• Future work

In this talk

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Stock-take

Project: Monitor and control of GHG emission reduction technologies from agricultural production system of China Period: 2011-2015 Fund: Non-profit Research Foundation for Agriculture (201103039), Ministry of Agriculture

Stock-take

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North East upland Institute of applied ecology, CAS Grass land Institute of Atmospheric Physics, CAS North China upland Shandong Academy

• f agricultural

sciences Live stock IEDA, CAAS Single rice Institute of Soil Science, CAS Dobule rice IEDA, CAAS North West up land China agricultural university Project Host: Chinese academy of agricultural sciences, CAAS

Double rice production of China

Double rice Double rice - fallow

Double rice - rape Double rice - vegetable

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Stock-take

Objectives

Monitor GHG emission Screen Practical mitigation technologies Demonstration Localization

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Mitigation choice

Mitigation technology

Bio-waste

Biochar

Cultivar

Nitrogen

Inhibitor

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B e i j i n g J i n g z h

• u

H u i z h

• u

u

China

C h a n g s h a

Field monitor

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Application of biochar

Ttreatments Base fertilization Tillering fertilization Jointing fertilization Booting fertilization Nb P2O5 K2O Biochar Straw N (Urea) N (Urea) K2O (KCL) Nb P2O5

b

K2Ob CK 72.00 135.00 72.00 34.50 55.20 45.00 36.00 36.00 36.00 BC1 72.00 135.00 72.00 5000 34.50 55.20 45.00 36.00 36.00 36.00 BC2 72.00 135.00 72.00 10000 34.50 55.20 45.00 36.00 36.00 36.00 BC3 72.00 135.00 72.00 20000 34.50 55.20 45.00 36.00 36.00 36.00 RS 72.00 132.36 72.00 2400 19.38 55.20 24.60 36.00 36.00 36.00 RI 72.00 132.36 72.00 2400 19.38 55.20 24.60 36.00 36.00 36.00

Application of the biochar

kg ha-1

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Cultivar Growth days (d ) Optimum grain yield (kg ha-1) Rice quality class Eating quality score Cold resistance Rice blast resistance Lodging resistance National standard Provincial standard Hefengzhan 128-130 410.75 3 3 74 Medium 83.3-88.89% Medium Yuejingsimiao 111-114 405.37 2 2 81 Medium weak 98.55-100%

• Qihuazhan

108-111 437.02 2 2 75-84 Medium 76.47-86.9% Medium strong Huangsizhan 129 437.86 1 1 90 Weak 63-63.77% Medium Huangruanzhan 132 435.54

• 3

76-81 Medium 95.5-100% Medium Yexianzhan 6 113 431.83 1

• Strong

65% Medium Yexianzhan 8 110-117 435.69 3

• Medium

53.5% Strong Huangxiuzhan 110-111 424.57 2

• 78-81

Medium 93.4% Medium strong Yueerzhan 127-130 461.70 2-3

• Medium

41.9% Weak

Characteristics of the rice cultivar

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 Jingzhou agrometeorological experimental station, Hubei province, China(30°21'N, 112°09'E), from May 3rd, 2012 to April 28th, 2014  An automatic sampling and monitoring system was used on each day during the rice growing season  Manual sampling was undertaken at intervals of 10 days during the winter fallow period  CH4 and N2O were analyzed by a gas chromatograph (Agilent 7890A)

Modification of new N fertilizer

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5 10 15 20 BCH BCM RI CK QH YX8 YE 相比CK百分比

水稻产量

• 100
• 80
• 60
• 40
• 20

20 40 60 80 100 BCH BCM RI CK QH YX8 YE 相比CK百分比

GHG排放当量

• 100
• 80
• 60
• 40
• 20

20 40 60 80 100 BCH BCM RI CK QH YX8 YE 相比CK百分比

碳排放强度 Same rice cultivar Different rice cultivar

Rice yield Yield – scaled GHG emission GHG emission Ratio / % Ratio / % Ratio / %

Technology screen

Biochar: 20t ha-1 Cultivar: Qihuazhan, Yue’erzhan, Yexianzhan 8

Low GWP and High yield

(Qin et al., 2014, 2015)

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1 2 3 4 5 6 7 8 9 10

CK CRU NU DMPP EM GWP（Mg CO2 eq ha-1）

0% a 29.4% b 22.0% b 39.5% bc 48.5% c 2012 1 2 3 4 5 6 7 8 9 10

CK CRU NU DMPP EM

CO2 eq(N2O) CO2 eq(CH4) 31.5% b 29.4% b 37.6% b 29.2% b 0% a 2013 a b b b b a b b b b 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

CK CRU NU DMPP EM

Rice season Whole rotation 2013 a c bc b b a c bc b bc 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

CK CRU NU DMPP EM GHGI（Mg CO2 eq Mg-1 grain）

2012

GWP of different treatments in 2012 (left panel) and 2013 (right panel) rotations GHGI of different treatments in 2012 (left panel) and 2013 (right panel) rotations

Treat： ① CK Urea (N≥46% ) ② CRU Polymer-coated controlled release urea (N≥42%, release period 90d) ③ NU N-Sever (N≥46%), a synthetic urea mixed with 0.5% nitrapyrin ④ DMPP Urea with 1% nitrification inhibitor 3,4- dimethylpyrazole phosphate ⑤ EM Urea with effective microorganisms

• Lower GWP and higher yield were observed with controlled release urea, nitrification inhibitor and

effective microorganisms use.

• Polymer-coated urea reduced CH4 emission significantly.
• Nitrification inhibitors reduced N2O emission significantly.
• N2O emissions and CH4 consumptions were notable during fallow period.

(Wang et al., 2015, AEE)

Modified N fertilizer

Low GWP and High yield

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Demonstration

Guangdong Hubei

Demonstration area: 4000 acre

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Stock-take

Priorities of research needs

Future work

Practicable mitigation

• ption

Uncertainty N2O emission from rice paddy

Ignore or not?

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I want you？

Thank you for your attention!

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