Narender Kumar*, Nikita Yadav, Amandeep Singh, Santosh Rani, Ashish Kumar
and Sonu Singh
CCS Haryana Agricultural University, Hisar-125004, India
Email: narender14300@gmail.com
Received-01.04.2022, Revised-15.04.2022, Accepted-29.04.2022
Abstract: Irrigated agriculture is an important part of agriculture and provides foods for humans as well as the feed to sustain animals. Irrigation plays a crucial role in agriculture. Management of water and fertilizers is of paramount importance for crop production. The present study was conducted to examine the effect of different nitrogen fertigation level on tomato and onion crop utilizing saline (ECiw ≈ 2.5 dSm-1) water through drip irrigation. All the recommended nutrients and 1/3rd of nitrogen were applied before transplanting the tomato and onion, whereas, recommended dose of nitrogen, phosphorous and potash was applied before transplanting. Remaining dose of nitrogen was splited and applied at weekly interval through drip. Soil moisture and salinity in the soil profile of different treatment was recorded at fortnight interval. WUE and NUE was also evaluated on the basis of yield, amount of water and fertilizer applied. Moisture content in the soil profile increased with the increase in the salt concentration of irrigation water (EC) and a decrease in moisture content was with an increase in N fertigation level. In addition to it, accumulation of salt at dripper was less and the level of salt increased while moving away from the emitting source (dripper) which verified that drip system has the capability to draw the salts away from the dripper. Yield and WUE under good quality water irrigation with N-fertigation of 100 kg/ha and 125 kg/ha was statistically at par but significantly higher than that at N-fertigation of 75 kg/ha. The increased N-fertigation level beyond RDN did not significantly improved the tomato yield and WUE but reduced the NUE.
Keywords: Drip irrigation, Fertigation, NUE, Saline water, Tomato, Onion, WUE
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