Skip to content
Research Article Open access CC BY 4.0

Exploring the Effect of Humic Acid on Chlorophyll Levels in Japanese Mint under Drip and Flood Irrigation Amidst Water and Nutrient Constraints

Rupanjali Baurai, Gurvinder Singh, K.P. Raverkar, Amit Bhatnagar, Sumit Chaturvedi

International Journal of Plant & Soil Science · pp. 207–213 · Published 1 Feb 2024

10.9734/ijpss/2024/v36i24382

Abstract

A field experiment on Mentha (Mentha arvensis L.) was conducted during the spring seasons of 2022 and 2023 at G.B. Pant University of Agriculture and Technology, Pantnagar. The objective was to investigate the impact of foliar spray of humic acid on SPAD values under conditions of limited water and nutrients. The experiment comprised two drip irrigation levels (80% and 100% of crop evapotranspiration) and four nutrient management practices. These practices included: 25% NPK basal + 75% NPK fertigation, 50% NPK basal + 50% NPK fertigation, No basal + 75% NPK fertigation + three foliar sprays of humic acid at 0.3%, and 25% NPK basal + 50% NPK fertigation + three foliar sprays of humic acid at 0.3%. The experiment was laid out in a randomized block design with three replicates (factorial), and an extra control was included. The control followed conventional practices, where the crop received recommended doses of fertilizers (N: P2O5: K2O @ 120:60:40 kg/ha) and was irrigated at an IW: CPE ratio of 1.2 with a 5 cm irrigation depth. Significantly higher SPAD values were observed when the crop was irrigated at 100% ETc level of drip irrigation and with nutrient management practices involving foliar application of humic acid, compared to 80% ETc level of drip irrigation and total NPK supply through chemical fertilizers, respectively. At harvest, crops irrigated at 100% ETc level recorded SPAD readings that were 11.1% and 18% higher than those irrigated at 80% ETc level during 2022 and 2023, respectively. The humic acid application helped to maintain the SPAD values even after a 25% reduction in nutrient dosage. SPAD values for control were significantly lower than the combination of best nutrient management practices with either 80 or 100% ETc level of drip irrigation.

Japanese mint humic acid SPAD drip fertigation

References (8)

  1. 1 Plant adaptation to drought stress [DOI]
  2. 2 The Impact of Drought in Plant Metabolism: How to Exploit Tolerance Mechanisms to Increase Crop Production [DOI]
  3. 3 Antibacterial and antioxidant activities of Mentha piperita L. [DOI]
  4. 4 Biostimulants for the Regulation of Reactive Oxygen Species Metabolism in Plants under Abiotic Stress [DOI]
  5. 5 Effects of humic acid derived from sediments on growth, photosynthesis and chloroplast ultrastructure in chrysanthemum [DOI]
  6. 6 Maize Production under Drought Stress: Nutrient Supply, Yield Prediction [DOI]
  7. 7 Effect of Humic Acids on Soybean Seedling Growth under Polyethylene-Glycol-6000-Induced Drought Stress [DOI]
  8. 8 R: A Language and Environment for Statistical Computing [DOI]

Cited by 0

No indexed citations yet.

Related research

Article metrics

Real usage data collected on this platform.

10

Page views

0

PDF downloads

1

Outbound clicks

0

Citations

Views over time

Views by country

Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".

Traffic sources

Referring site, by host.

Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.