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Subject: Agricultural Engineering × Author: Ashwani × Start date: 2010 × Thesis Type: M.Tech. ×
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    ThesisItemOpen Access
    Nitrogen fertigation requirement for chilli crop using marginally saline water with different frequency of drip irrigation
    (CCSHAU, 2018) Ashwani; Sanjay Kumar
    This experiment was conducted to examine nitrogen fertigation requirement for chilli crop using marginally saline water with different frequency of drip irrigation. Experiment was carried out in micro plots (2m x 2m) constructed in lab area of Department of Soil and Water Engineering, COEA&T, CCSHAU, Hisar, Haryana, India. Irrigation of marginal quality (EC ~ 2.5 dS m-1) water was scheduled on the basis of daily (I1) and alternate day (I2) with combination of three fertigation levels (F1: 75% RDN, F2: 100% RDN and F3: 125% RDN) and surface irrigation (Si) with 100% RDN as control with three replication. The highest yield (10.69 t ha-1) was obtained under daily drip irrigation with 125% RDN (I1F3), followed by 100% RDN (I1F2) having 10.23 t ha-1 yield. In daily irrigation, 28.2% and 34.0% more yield was obtained in I1F2 and I1F3 in comparison to I1F1. Among the drip irrigation, I1F3 treatment has obtained the highest water use efficiency (4.17 kg m-3) and its lowest value 3.19 kg m-3 was obtained in I2F1 treatment. The highest NUE (172.2 kg of chilli per kg of Nitrogen) was obtained under daily drip irrigation with 75% RDN (I1F1), followed by 100% RDN (165.6 kg of chilli per kg of Nitrogen). The highest nitrogen uptake (64.99 kg ha-1) was obtained under daily drip irrigation with 125% RDN (I1F3), followed by 100% RDN (I1F2) having 61.68 kg ha-1. With respect to irrigation frequencies as well as different RDN levels, nitrogen uptake was found significantly different. In daily drip irrigation, among fertigation level at 85 DAT, 23.4 and 27.2% higher CFL was recorded in I1F2 and I1F3, respectively in comparison to I1F1 treatment. Similar observations were also recorded in NDVI. From all the observation, it was concluded that salinity can be lowered by increasing the irrigation frequency and got better result in crop production under saline water through drip system. N- fertigation level supply beyond 100% RDN had no significant effect on yield.