results of field experiments in pailin - care presented by mr touch van
TRANSCRIPT
Results Of Field Results Of Field Experiments In PAILIN - Experiments In PAILIN - CARECARE
Presented by Mr Touch Van
The CARE Project Team
Mr Em Sophoeun, Mr Sok Sea, Mr Touch Van, and Mr Li Bunthoeun
Field Trials In MWS 2008
Maize Fertiliser Trials Legume Rhizobium Trials
Rhizobium inoculation of soybean, mungbean and peanut
What We DidWhat We Did
Four Legume Rhizobium Trials located in 4 villages, one in each cluster:
Bortaisour O’ra el Spong Presantas
TreatmentsTreatmentsUrea at 87 kg/ha = 40 kg/ha N.
Treatment No.
Crop Rhizobium
1 Soybean Nil rhizobium
2 Soybean Plus rhizobium
3 Soybean Urea 87 kg/ha
4 Mungbean Nil rhizobium
5 Mungbean Plus rhizobium
6 Mungbean Urea 87 kg/ha
7 Peanut Nil rhizobium
8 Peanut Plus rhizobium
9 Peanut Urea 87 kg/ha
Results
Soybean failed due to poor seed The response to N was variable There was a significant positive
response to RH for MB and PN at all sites
Effect of rhizobium inoculation on yield of mungbean and peanut
0
1
2
3
4
5
6
7
MB PN
t/h
a
-RH +RH
30% increase
15% increase
Maize Trials
What we didWhat we did Four Maize Nitrogen Trials located in 4 villages, one in each cluster :
Bortaisour O’ra el Spong Presantas
Maize Maize treatmentstreatments
Topdressing 1 Topdressing 2
0 0
25 0
50 0
75 0
100 0
0 25
0 50
0 75
0 100
25 25
37.5 37.5
50 50
Maize yield resultsMaize yield results
The response to N was inconsistent and variable
The late topdressing was applied too late
Soil nitrate tests should be used to select low fertility sites for trials
4
5
6
7
8
9
10
11
12
Control 25E 50E 75E 100E
Rate of Urea
t/ha
cob
Lessons learnt: Lessons learnt: legumelegume
Soybean Need certified and good seeds Need pesticide to protect while the flowering & fruiting
Mungbean Rain can affect grain quality (Disease problems) Difficult to harvest in a couple of different times
Peanut Late to harvest, some peanut seeds can germinate in the ground Difficult to harvest and require high labours (150 persons/day)
Lessons learnt: Lessons learnt: maizemaize
Weed management (Timing, technique)
Water logging (one site affected by water logging)
Urea Application (2nd time application seem to be late) (Low response to Urea because soil fertility seems
to be high)
What next – EWS What next – EWS 20092009
Baseline soil survey (50 farm fields) Continue rhizobium trials – 4 sites
(replicated, otherwise same design as 2008) Maize nitrogen trials – 4 sites
(replicated, more rates, early topdressing only) Long-term rotation experiment – 1 site:
1. Continuous maize – exploitive local practice2. Continuous maize – chemical fertiliser3. Mungbean (EWS) Maize (MWS) – biological system 14. Maize (EWS) Soybean (MWS) – biological system 2
Thank you