S5-MICRO IRRIGATION (SPRINKLER, DRIP ETC.)
STUDIES ON CROP GEOMETRY, IRRIGATION AND FERTIGATION IN BRINJAL UNDER DRIP SYSTEM OF IRRIGATION B. S. YADAV & R.P.S. CHAUHAN
Agricultural Research Station (Rajasthan Agricultural University) Sriganganagar - 335 001
Crop Geometry
Objective : To find out optimum crop geometry for brinjal under drip irrigation system. Treatments : Crop geometry G1 = 60 cm single row G2 = 90 cm single row G3= 108 cm single row G4 = 120 cm X 60 cm paired row G5 = 75 cm X 60 cm paired row a) Design : RBD b) Replication : Four
Irrigation Scheduling
Objective: To find out optimum irrigation schedule for brinjal under drip irrigation Treatments: I1 = 0.6 Etc through drip on alternate day I2 = 0.8 Etc through drip on alternate day I3 = 1.0 Etc through drip on alternate day I4 = 1.2 Etc through drip on alternate day I5 = Flood irrigation at IW/CPE 1 a) Design : RBD b) Replication : Four c) Plot size : 9m x 6m
Fertigation
Objective: To find out optimum fertigation schedule for brinjal Treatments: T1 = Control (Recommended Practice with Flood irrigation) T2 = 80% RD in 9 Splits (13 days interval) T3 = 80% RD in 12 splits (10 days interval) T4 = 60% RD in 9 splits (13 days interval) T5 = 60% RD in 12 splits (10 days interval) a) Design : RBD b) Replication : Four c) Plot size : 9m x 6m
Irrigation events and irrigation water applied (mm) Drip
Flood
Year
Irri. Events
0.6 Etc
0.8 Etc
1.0 Etc
1.2 Etc
Irri. Events
Water applied
2009-10
60
380.6
497.7
614.2
731.1
13
940
2010-11
48
398.2
519.7
641.1
762.4
12
840
2011-12
65
478.2
625.6
773.0
920.4
13
940
12.67
906.67
Average
57.67 419.0 547.67 676.10 804.63 Average rainfall 67.8 mm, Average PE 682.9 mm
Effect of crop geometry on yield and water expense efficiency (pooled data) Treatments 60 cm single row 90 cm single row 108 cm single row 120 x 60 cm paired row 75 x 60 cm paired row SEd CD
Fruit yield (q/ha)
Plant Total No of population water use fruits/plant /ha (mm)
WEE (kg/ha mm)
547.37
145.21
23704
719
76.10
507.70
170.75
18210
719
70.59
489.15
198.14
14707
719
68.01
511.82
155.49
18086
719
71.16
520.81
124.20
20838
719
69.14
16.72 36.44
4.12 8.99
401 874
-
-
Low Tunnel
Without LowTunnel
Effect of drip irrigation on yield, water use & WEE of Brinjal (pooled data) Irrigation schedule
Fruit yield (q/ha)
Water Use (mm)
WEE (kg/ha mm)
556.46
467.47
119.04
657.38
588.57
111.69
814.03
709.43
114.74
821.29
790.43
103.90
S Ed
621.64 22.06
1007.8 -
61.68 -
CD
48.07
-
-
Drip at 0.6 ETc Drip at 0.8 ETc Drip at 1.0 ETc Drip at 1.2 ETc Flood irrigation
Effect of fertigation on yield, water use & WEE of brinjal (pooled data) Fertigation schedule
Fruit yield (q/ha)
Water Use (mm)
WEE (kg/ha mm)
Control (RP)
652.7
1007.8
64.76
80% RD (9)
811.6
709.4
114.41
80% RD (12)
852.4
709.4
120.16
60% RD (9)
697.7
709.4
98.35
60% RD (12)
675.6
709.4
95.24
S Ed
22.9
-
-
CD
49.9
-
-
Irrigation schedule in Brinjal Month Duration of irrigation Hour Minute December
-
25
January
-
32
February
1
16
March
1
52
April
3
05
May
3
51
Optimum crop geometry 60 x 120 cm paired Optimum irrigation schedule at 1.0 ETc Optimum fertigation schedule at 80% RD in 12 equal splits at 10 days interval