Efficient Need Based Nitrogen Management in Rabi Maize (Zea mays L.) using Leaf Colour Chart Under Varied Planting Density

Authors

  • M. Ramesh Naik Dept. of Agronomy, ICAR-National Academy of Agricultural Research Management, Hyderabad, Telangana (500 030), India https://orcid.org/0000-0002-4556-4622
  • S. Hemalatha Dept. of Agronomy, S.V. Agricultural College, Tirupati, ANGRAU, Andhra Pradesh (517 502), India
  • A. P. K. Reddy Dept. of Agronomy, Acharya N.G. Ranga Agricultural University, Guntur, Andhra Pradesh (522 034), India
  • K. V. Naga Madhuri Dept. of Soil Science, Regional Agricultural Research Station, Tirupati, Andhra Pradesh (517 502), India
  • V. Umamahesh Dept. of Crop Physiology, S.V. Agricultural College, Tirupati, ANGRAU, Andhra Pradesh (517 502), India
  • S. Rakesh Dept. of Soil Science, ICAR-National Academy of Agricultural Research Management, Hyderabad, Telangana (500 030), India

Keywords:

LCC, maize, nitrogen, nitrogen uptake, planting density

Abstract

The field experiments were conducted for two consecutive rabi seasons (November –March) of 2017–18 and 2018–19 at the Wet land farm of S.V. Agricultural College, Tirupati to calibrate leaf colour chart (LCC) for increasing growth yield, nitrogen uptake under varied plant density to establish and evaluate threshold leaf colour greenness as a guide for in-season need based fertilizer N in maize. Research results indicated that the planting density, nitrogen levels and LCC threshold values significantly influenced all the growth and yield attributes, yield and nitrogen uptake. Plant height, days required to 50% tasselling and silking, cob yield, harvest index and nitrogen uptake increased significantly with increase in plant density i.e., 1,11,111 plants ha-1 with application of fertilizer nitrogen at higher dose i.e. 40 kg ha-1 and by using higher LCC threshold value (LCC 5) in different splits. Whereas, leaf area planr-1, cob girth, number of kernels rows cob-1 and number of kernels cob-1 was lessened significantly with increase in planting density, however it was increased with application of nitrogen at higher rate i.e.,40 kg ha-1 by using higher LCC threshold value (LCC 5) at various splits. Eventually, experimental results manifested that, fine-tuning of N dose and time of application by number of splits which synchronize the crop demand was the best management strategy for sustainable crop growth, production and productivity of maize.

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Published

2022-06-30

How to Cite

1.
Naik MR, Hemalatha S, Reddy APK, Madhuri KVN, Umamahesh V, Rakesh S. Efficient Need Based Nitrogen Management in Rabi Maize (Zea mays L.) using Leaf Colour Chart Under Varied Planting Density. IJBSM [Internet]. 2022 Jun. 30 [cited 2024 May 24];13(Jun, 6):586-94. Available from: https://ojs.pphouse.org/index.php/IJBSM/article/view/4256

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