Effect of Nano Nitrogen and Nano Zinc on Growth and Yield of Paddy in Paddy-Paddy Cropping System
Sahana *
Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Raichur-584104, Karnataka, India.
M. V. Ravi
Department of Soil Science and Agricultural Chemistry, Collage of Agriculture, Gangavathi, Karnataka, India.
K. Narayana Rao
Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Raichur-584104, Karnataka, India.
J. Vishwanath
AICRP on Management of Salt Affected Soils, Agriculture Research Station, Gangavathi, Karnataka, India.
M. R. Umesh
Department of Agronomy, AICRP on Sunflower, MARS, Department of Agronomy, University of Agricultural Sciences, Raichur-584104, Karnatak, India.
Mahadevaswamy
Department of Agricultural Microbiology, University of Agricultural Sciences, Raichur-584104, Karnataka, India.
*Author to whom correspondence should be addressed.
Abstract
An investigation on nano nitrogen and nano zinc with different levels of nitrogen approaches on growth and yield of paddy was conducted during rabi and kharif seasons of 2020-21 and 2021-22 at Krishi Vigyana Kendra, Gangavathi, Koppal, Karnataka, India. The experiment was laid out in split-split plot design with three replications, which consisted of four levels of nitrogen in main plots, three levels of nano nitrogen in sub plots and two levels of nano zinc in sub-sub plots. The treatment with application of 125 per cent Recommended Dose of Nitrogen (RDN) has recorded significantly taller plants (97.11 and 96.54 cm), higher number of tillers hill-1 (19.65 and18.14) and total dry matter (70.06 and 64.54 g hill-1) at harvest stage of crop and the Soil Plant Analysis Development (SPAD) values (46.69 and 42.60) and Normalized Difference Vegetation Index (NDVI) values (0.85 and 0.82) at flowering stage of crop, Similarly, foliar spray of nitrogen @ 4000 ppm has recorded significantly higher plant height (95.44 and 91.33 cm), higher number of tillers hill-1 (17.75 and 16.01), total dry matter (66.84 and 62.31 g hill-1) SPAD values at flowering stage (44.89 and 41.29), NDVI values at flowering stage (0.81 and 0.74), grain yield (5623 & and 6840 kg ha-1) and straw yield (5352 and 6581 kg ha-1). Interaction effect showed non-significant effect with different combination treatments.
Keywords: Nano nitrogen, nano zinc, foliar spray, growth