STUDIES ON CROP GEOMETRY, IRRIGATION AND FERTIGATION IN BRINJAL UNDER DRIP SYSTEM OF IRRIGATION

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