Author(s):

Muruganandam C, I Anandaraj, TR Barath Kumar and S Sivasankar

Abstract: An investigation was undertaken to study the effect of graded levels of nitrogen and Azospirillum on yield and quality of ash gourd (Benincasa hispida Cogn.) cv. CO.1 in the new area, vegetable unit, Annamalai University, Annamalai nagar during January-May 2016. The doses comprised of 5 levels of nitrogen viz., 30, 45, 60, 75 and 90 kg ha^‑1 and in two levels of Azospirillum with and without Azospirillum (A₁ and A₀ respectively) with a total of 10 treatments replicated thrice in a randomized block design (RBD). The results revealed that the treatment of combined application of nitrogen 75 kg ha^-1 along with of Azospirillum @ 2 kg ha^-1 of soil application recorded the highest number of fruits per vine, fruit length, fruit weight and fruit yield per plot. Besides, the total soluble solids, dry matter production, NPK uptake and post- harvest soil available nutrients were also higher due to application of 75 kg N ha^-1 along with Azospirillum @ 2 kg ha^-1 of soil application. In a nutshell, combined application of nitrogen @ 75 kg ha^-1 along with Azospirillum @ 2 kg ha^-1of soil application could be recommended for obtaining higher yield in ash gourd.

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