ORYZA- An International Journal on Rice
  • Year: 2007
  • Volume: 44
  • Issue: 3

Effect of humic acid on the yield and nutrient uptake of rice

  • Author:
  • K. Sivakumar, L. Devarajan, K. Dhanasekaran, D. Venkatakrishnan, U. Surendran
  • Total Page Count: 3
  • Page Number: 277 to 279

Department of Soil Science and Agricultural Chemistry, Faculty of Agriculture, Annamalai University, Annamalai Nagar-608002, Tamil Nadu, India

Abstract

The response of humic acid (HA) on the yield and nutrient uptake of rice (ADT-39) was study. The application of humic acid upto 20 kg ha-1 along with 100 per cent (150:50:50 NPK ha-1) recommended dose resulted in highest grain yield (4253 kg ha-1) as well as highest total uptake of nitrogen (132.0 kg ha-1), phosphorus (20.75 kg ha-1) and potassium (86.98 kg ha-1). The total N uptake significantly increased from 20.3 (control)) to 132.0 kg ha-1 to (100 per cent NPK + 20 kg HA ha-1)). The total P and K uptake also increased from 5.82 (control) to 20.75 kg ha-1 (100% NPK + 20 kg HA) and 28.97 (control) to 86.98 kg ha-1(100% NPK + 20 kg HA) respectively.

Keywords

K - humate, Lignite, humic acid, rice and nutrient uptake