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Vol. 11, Issue 2 (2022)

Effect of nitrogen management practices on SPAD values and NDVI readings of rice crop

Author(s):
Vijay Kumar Didal, GE Ch. Vidyasagar, R Mahender Kumar, K Surekha, S Narender Reddy and Brijbhooshan
Abstract:
A field experiment was conducted during kharif 2017 and 2018 at ICAR-Indian Institute of Rice Research, Rajendranagar, Hyderabad to study the “Effect of nitrogen management practices on SPAD values and NDVI readings of rice crop”. The experiment was laid out in split plot design with two establishment methods [Normal transplanting (M1) and mechanized system of rice intensification (M2)] in main plots and six nitrogen management practices [N1- Nutrient Expert based recommendation of nitrogen with Neem coated urea, N2- Nutrient Expert based recommendation of nitrogen with Neem coated urea (75%) + vermicompost (25%), N3- Recommended dose of nitrogen with Neem coated urea, N4- Recommended dose of nitrogen with Neem coated urea (75%) + vermicompost (25%), N5- N omission, N6- Absolute control (No N, P and K fertilizer application)] in sub-plots with three replications.
Mean SPAD values were higher in mechanized SRI (M2) (35.4, 37.8 and 37.1 at 30, 60 and 90 DAS, respectively) as compared to normal transplanting (M1) (32.9, 36.9 and 35.7 at 30, 60 and 90 DAS, respectively). At all the growth stages, application of nitrogen as per recommendation of Nutrient Expert with NCU (75%) and VC (25%) (N2) recorded significantly higher SPAD values as compared to nitrogen omission (N5) and absolute control (N6). Mechanized SRI (M2) recorded higher GreenSeeker® NDVI reading (0.630 and 0.648 at 60 and 90 DAS, respectively) as compared to normal transplanting (M1) (0.589 and 0.620 at 60 and 90 DAS, respectively). Application of nitrogen as per recommendation of Nutrient Expert with NCU (75%) and VC (25%) (N2) recorded significantly higher mean GreenSeeker® NDVI values (0.673 and 0.686 at 60 and 90 DAS, respectively) as compared to nitrogen omission (N5) (0.543 and 0.572 at 60 and 90 DAS, respectively) and absolute control (N6) (0.509 and 0.543 at 60 and 90 DAS, respectively).
Pages: 367-371  |  591 Views  19 Downloads
How to cite this article:
Vijay Kumar Didal, GE Ch. Vidyasagar, R Mahender Kumar, K Surekha, S Narender Reddy, Brijbhooshan. Effect of nitrogen management practices on SPAD values and NDVI readings of rice crop. Pharma Innovation 2022;11(2):367-371.
The Pharma Innovation Journal