Evaluation of Nano-DAP on Plant Growth, Enzymatic Activity and Yield in Paddy (Oryza sativa L.)

Anusha Maloth *

College of Agriculture, PJTSAU, Rajendranagar, Hyderabad, Telangana, India.

Ramesh Thatikunta

Department of Crop Physiology, PJTSAU, Rajendranagar, Hyderabad- 500030, Telangana, India.

Binaya Kumar Parida

Coromandel International Limited, Kalasiguda, Hyderabad-500003, Telangana, India.

D. Saida Naik

Department of Crop Physiology, Agricultural College, Jagityal, Karimnagar-505529, Telangana, India.

N. Rama Gopala Varma

Department of Entomology, Institute of Rice Research, Agricultural Research Institute, Rajendranagar, Hyderabad-500030, Telangana, India.

*Author to whom correspondence should be addressed.


A field experiment was conducted during Rabi 2022-23 at the College of Agriculture, Rajendranagar, Hyderabad, Telangana, focusing on the impact of using nano-DAP through foliar application on plant growth, yield, enzymatic activity and nutrient content in paddy variety KNM 1638. The experiment employed a randomized block design (RBD) with seven different treatments, each replicated three times. The study recorded various growth parameters, enzymatic activity, yield and nutrient content. The results demonstrated that, application of 100% NK + 75% P in combination with two foliar sprays of nano-DAP at both tillering and panicle initiation stages (T6) led to superior plant growth parameters such as number of tillers hill-1 (13.18), total dry matter (42.12 g hill-1), increased yield parameters such as number of productive tillers hill-1 (11.25), number of grains panicle-1 (297) and yield (7530.86 kg ha-1) and nutrient content such as N (2.33%), P (0.19%) and K content (1.68%). The enzyme Glutamine Synthetase (GS) activity was found to be significantly higher with the application of 100% NPK with two foliar sprays of nano-DAP at tillering and panicle initiation stages (T3). While the acid and alkaline phosphatase activity recorded maximum with 100%.

Keywords: Rice, foliar application, nano-DAP, enzyme activity, yield

How to Cite

Maloth , Anusha, Ramesh Thatikunta, Binaya Kumar Parida, D. Saida Naik, and N. Rama Gopala Varma. 2024. “Evaluation of Nano-DAP on Plant Growth, Enzymatic Activity and Yield in Paddy (Oryza Sativa L.)”. International Journal of Environment and Climate Change 14 (1):890-97. https://doi.org/10.9734/ijecc/2024/v14i13907.


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