ACIAR CSE 2009-037 - Improved rice establishment in Cambodia and Australia – Geoff Beecher

Salinity tolerance of Australian rice

Sam North, Don Griffin

Unravelling the interaction of salinity, climate and soil on cultivar tolerance

Activity 6.2 - ACIAR CSE 2009-037

Objectives� Determine salinity tolerance of Australian rice cultivars� Determine bay water salinity thresholds to inform crop

management

Research program� 2010/11 – field trial - bay water salinity thresholds

� 2011/12 – glasshouse – relative salinity tolerance

� 2012 to 2014 – district and glasshouse trials

Photo taken 18 March 2011

2.0

fresh

3.0

2.0fresh

3.0

2.5

1.5

fresh

2.5

2.0

3.0

3.0

2.5

fresh

2.0

2.5

1.5

1.5

1.5

6

8

10

12

14

Amaroo Sherpa

Season average bay water salinity (dS/m)

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

6

8

10

12

14

Reiziq Illabong

Gra

in y

ield

(t/

ha)

6

8

10

12

14

Quest Doongarah

Grain yield

Rate R2 P

-1.1 0.50 0.005

-1.0 0.62 0.002

-0.8 0.22 0.09

-0.6 0.26 0.037

-0.3 0.1 0.24

0.0 0 0.99

Glasshouse – salinity from PI on Experiment 1 Experiment 2

plant

yield

plant

pan

pan

seeds

seed

g

plant

yield

plant

pan

pan

seeds

seed

g

Amaroo sig sig Doongarah sig Illabong sig sig sig sig Quest Reiziq sig sig sig Sherpa sig sig sig sig Opus sig sig Langi sig sig YRF 209 sig YRW 4 sig sig sig sig IR 45427 (tolerant) sig sig sig IR 58 (sensitive) sig sig IR 29 (sensitive) sig sig Sen Pidao sig IR 66

Trial 1

-30

-25

-20

-15

-10

-5

0

5

10

15

Amaroo

Quest

DoongarahYRF 209Reiziq

IR 58O

pusLangi

IR 45427SherpaYRW

4Illabong

Dif

fere

nce

in

se

ed

s p

er

pa

nic

le

5% LSD = 12

-4.0

-3.5

-3.0

-2.5

-2.0

-1.5

-1.0

-0.5

0.0

0.5

Amaroo

Quest

DoongarahYRF 209Reiziq

IR 58O

pusLangi

IR 45427SherpaYRW

4Illabong

Dif

fere

nce

in

10

00

gra

in w

eig

hts

(g

)

5% LSD = 0.84

Seeds per panicle

1000 grain weight

Stomatal resistance

Reiziq

R2 = 0.256

R2 = 0.8496

0.00

0.50

1.00

1.50

2.00

2.50

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Vapour pressure deficit

Fresh

Saline

Amaroo

R2 = 0.8367

R2 = 0.60660.00

0.50

1.00

1.50

2.00

2.50

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Vapour pressure deficit

Fresh

Saline

IR 45427

R2 = 0.3341

R2 = 0.39340.00

0.50

1.00

1.50

2.00

2.50

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Vapour pressure deficit

Fresh

Saline

IR 58

R2 = 0.6638

R2 = 0.51370.00

0.50

1.00

1.50

2.00

2.50

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Vapour pressure deficit

Fresh

Saline

Sodium exclusion

0.0

0.5

1.0

1.5

2.0

Amaroo Doongarah Illabong Quest Reiziq Sherpa

Na:

K r

atio

fresh3 dS/m

0.0

0.5

1.0

1.5

2.0

IR58 IR45427 Amaroo Doongarah Sherpa Rieziq Quest Illabong

Na:

K r

atio

FreshSaline

0.0

0.5

1.0

1.5

2.0

IR58 IR45427 Amaroo Doongarah YRF 209 YRW 4

Na:

K r

atio

FreshSalineTrial 3

Trial 4

2010-11 Field trial

Saline/sodic groundwater + rice = trouble(if not managed appropriately)

-10

10

30

50

70

90

110

130

150

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Time (hours)

Cu

mu

lati

ve in

filt

rati

on

(m

m)

FreshFresh1.5 dS/m2 dS/m2.5 dS/m2.5 dS/m3 dS/m3 dS/m