Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
which helps to achieve sustained crop production. Thus, the use of micro irrigation system
comprises drip and micro sprinkler system offers a great degree of control over water and
fertilizer application to meet the requirement of crops. Irrigation scheduling by these systems
are usually based on water requirement of crop to maintain favourable soil water content in the
root zone, that helps to achieve sustained growth and yield gains up to 100 per cent, water
savings upto 40 to 80 per cent, and associated fertilizer, pesticide and labour savings over
conventional irrigation systems. In recent years the water released from NSP left canal is
reduced. Added to this, low groundwater recharges in the wells situated in the vicinity of NSP
left canal command area warrants for growing of ID crops only. In view of the above, an
investigation was undertaken to assess performance of groundnut under drip and micro
sprinkler system with various doses of fertilizers comparison to the conventional system.
Methodology
A field experiment was conducted for two consecutive years during rabi 2018-19 and rabi
2019-20 at Agricultural Research Station, Garikapadu, Krishna district, ANGRAU with the
objective to identify the suitable micro irrigation method, schedule and fertilizer dose for rabi
groundnut crop. The treatments consist of three methods of irrigation as main plots i.e.,
sprinkler, drip irrigation and check basin methods with four fertilizer doses as subplots i.e., 100
%, 75 %, 50 % RDF and soil test-based fertilizer application and three irrigation schedules i.e.,
IW/CPE ratio of 1.0, 0.8 and 0.6 as sub-sub plots. The experiment was laid out in a split-split
plot design and replicated thrice. Groundnut variety Kadiri 6 Irrigation schedules were given
based on the pan evaporimeter readings located in ARS, Garikapadu premises and imposed the
treatments with 10 mm irrigation from 30 DAS to 60 DAS and 15 mm irrigation from 61 DAS
to maturity in drip method, 30 mm irrigation from 30 DAS to maturity in mini sprinkler method
and 50 mm depth irrigation from 30 DAS to maturity in check basin method. Biometrical
observations at harvest, yield attributes and field water use efficiency recorded as per defined
procedures.
Results
The results (pooled for 2018-19 and 2019-20) were recorded on number of pods plant -1 ,
hundred kernel weight (g), pod yield (kg ha -1 ) and field water use efficiency (kg ha -1 mm -1 ) are
presented in Table 1. The number of pods plant -1 was significantly varied by irrigation
schedules as well as interaction between methods of irrigation and fertilizer doses. Among
irrigation schedules, IW/CPE ratios of 1.0 and 0.8 were comparable and significantly superior
to IW/CPE ratio of 0.6. They were significantly lowest at IW/CPE ratio of 0.6 at all fertilizer
doses. Irrigation methods and interactions between irrigation methods and fertilizer doses and
interaction between all treatmental combinations have significantly influenced the pod yield of
groundnut. Among methods of irrigation, significantly highest pod yield was with drip method
of irrigation (2079 kg ha -1 ). While, rainport mini sprinkler irrigation and check basin method
Resilience through land and water management interventions, water management and governance
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