Precision nitrogen management in wheat using leaf color chart and its effect on grain yield & nitrogen use efficiencies


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leaf color chart based nitrogen management in wheat

Authors

  • Usha Kumari Assistant scientist
  • Dev Raj CCS HAU, Hisar
  • Krishan Kumar Bhardwaj
  • Pooja Jangra CCS HAU, Hisar
  • Manoj Kumar Sharma CCS HAU, Hisar

Keywords:

Efficiency, Leaf color chart (LCC), N management, Nitrogen saving, Wheat yield

Abstract

A two-year study was conducted at research farm, Department of Soil Science, CCS HAU, Hisar in rabi season during 2020-2021 and 2021-2022. The nitrogen was applied based on different approaches as per following treatment details viz., T1: Control; T2: Recommended dose of Nitrogen (Blanket recommendation of 150 kg N /ha in two equal split at basal and at first irrigation); T3: Soil test based nitrogen management; T4: STCR based nitrogen management; T5: Leaf color chart (LCC) based nitrogen management followed after application of 46 kg N/ha at CRI stage; T6: LCC based nitrogen management starting at CRI stage. Grain and straw yield of wheat was found higher in T5 treatment which was statistically on par with that of T4 and T6, however saving of fertilizer N from 8-68 kg/ha was observed under this treatment. Here, we found that the supply of nitrogen (46 kg/ha) at CRI stage is prerequisite and cannot be ruled out to attain the maximum yield. The nitrogen use efficiencies as apparent recovery efficiency, agronomic efficiency supported the finding and higher value of these were found with N management via LCC (T5) and varied from 21.23-67.71 in both the years. PAU LCC based nitrogen management can be used as economical viable and user friendly tool to govern the nitrogen requirement of wheat crop of this region.

Author Biographies

  • Dev Raj, CCS HAU, Hisar

    Assistant Scientist, Soil Science, COA

  • Krishan Kumar Bhardwaj

    Assistant Scientist, Department of Soil Science

  • Pooja Jangra, CCS HAU, Hisar

    Assistant Scientist, Department of soil science, Hisar

  • Manoj Kumar Sharma, CCS HAU, Hisar

    Professor & Head, Department of soil science, COA, CCS HAU

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Submitted

2023-04-01

Published

2024-01-08

Issue

Section

Research Article

How to Cite

Precision nitrogen management in wheat using leaf color chart and its effect on grain yield & nitrogen use efficiencies: leaf color chart based nitrogen management in wheat. (2024). Journal of Cereal Research, 15(2). https://epubs.icar.org.in/index.php/JWR/article/view/134912

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