Influence of Irrigation Schedules on Yield and Nutrient Uptake of Groundnut Varieties

Aim: Evaluation of different irrigation schedules on yield and nutrient uptake of groundnut varieties.

Study Design: The experiment was laid out in split plot design with different irrigation schedules in main plot and different groundnut varieties in sub plots and was replicated thrice.

Place and Duration of Study: The field experiment was conducted during rabi season of 2021 and 2022 at the Agricultural College Farm, Bapatla, ANGRAU, Lam, Guntur, Andhra Pradesh.

Methodology: The experiment was performed with twelve treatments in split plot design. The main plot comprised three different irrigation schedules (IW/CPE ratio of 1.0, 0.8 and 0.6) and sub plot with four different groundnut varieties (TAG-24, Dheeraj, Kadiri Lepakshi and Kadiri Chitravati). Observations of the crop and soil during the experimentation were recorded at regular intervals. The significance of the treatment impact was examined by the test.

Results: The experimental results indicated that among different irrigation schedules, IW/CPE ratio of 1.0 recorded highest pod yield (3175 kg ha-1) and haulm yield (4291 kg ha-1) which was significantly superior over IW/CPE ratio of 0.6 (pod yield-2579 kg ha-1 and haulm yield-3681 kg ha-1) but found on a par with IW/CPE ratio of 0.8 (pod yield-2916 kg ha-1 and haulm yield-4034 kg ha-1). Among the varieties, Kadiri Lepakshi recorded highest pod yield (3607 kg ha-1) and haulm yield (4647 kg ha-1) which was significantly superior over Kadiri Chitravati, Dheeraj and TAG-24 and lowest pod (2074 kg ha-1) and haulm yield (3424 kg ha-1) was recorded with TAG-24. Highest N, P and K uptake of plant (104.2, 11.8 and 54.3, respectively) was recorded with irrigation scheduled at IW/CPE ratio of 1.0 along with Kadiri Lepakshi compared to the other treatments.