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B. RAMANJANEYA, K.S. KUMAR*, V. PRAVEEN RAO, V. RAMULU AND G. SHWETHA
College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad– 500 030.
Greenhouse tomato production in semiarid tropical climate suffers from sustainable yields due to lack of optimized irrigation and fertigation levels. The experiment was conducted in a naturally ventilated greenhouse with 3 levels of irrigation and fertigation in a randomized block design. The irrigation and fertigation levels are replicated thrice to keep the error degree of freedom in limits. The experimental soil was sandy clay loam in texture with low available nitrogen and high available phosphorous and potassium. The results of the study indicated that the highest lycopene content of tomato at initial and final pickings (3.47 mg 100 g-1 ), (6.57 mg 100 g-1) was recorded in GHC + Drip irrigation (1.0 Epan) + 125% N as compared to the rest of the treatments followed by lowest( 1.40 mg 100 g-1), (3.53 mg 100 g-1) in NGHC + Control (100% N + surface irrigation) = IW/CPE @ 5 cm. Total NPK uptake in tomato fruits and haulms at 30, 60 and 90 DAT and at harvest was significantly superior in GHC + Drip irrigation (1.0 x Epan) + 125% N, over the rest of treatments. The lowest NPK uptake was reported in the control (NGHC + Control (100% N + surface irrigation = IW/CPE @ 5 cm). From the study it is inferred that the existing green house micro climate and optimized irrigation and fertigation level are suitable for tomato production.
Dry matter, Fertigation, Greenhouse tomato, Nutrient uptake