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<p>The adoption of biostimulants to augment agricultural productivity has garnered increasing attention on a global scale, with particular interest directed towards seaweed extracts. Among these, <i>Kappaphycus alvarezii</i> seaweed extract (KSWE) has emerged as a promising candidate for its multifaceted benefits encompassing enhanced nutrient assimilation, augmented photosynthetic activity, hormonal modulation, and fortification of plant defense mechanisms. While existing literature underscores its favorable impact across various crop species, there are conspicuous gaps in knowledge pertaining to the response of different crop varieties to KSWE within specific agro-climatic situation. This study aimed to address this by examining two black gram (<i>Vigna mungo</i>)&#xa0;varieties, TAU-1 and DBGV-5, and their response to KSWE application when grown in the same geographical location over two consecutive years. The results showed significant improvements in growth parameters such as leaf area, leaf area index, photosynthetic rates, and vegetative dry matter accumulation (DMA) at an optimum concentration of 5% KSWE (0.02% TSS w/v), beyond which no additional advantage was apparent. However, at 15% KSWE the DMA was significantly lower than the control at harvest in 2019 and at 43 days after sowing in 2020. The effects on nitrogen fixation as evidenced by total amino acid, nitrate and ureide content in the xylem exudates were inconsistent across applied concentrations, growth stages, and varieties, thereby highlighting that they were not influenced by KSWE. The variability in responses for several growth, yield and quality attributes across different years underscores the importance of considering seasonal factors, emphasizing the necessity for a comprehensive understanding of the effects of seasonal changes on plant responses due to KSWE application.</p>

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Varied responses of TAU-1 and DBGV-5 varieties of black gram to Kappaphycus alvarezii-based biostimulant under uniform agro-climatic conditions

  • 期刊论文

  • 发表日期：

    2025年1月4日

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  • Vijay Anand K. Gopalakrishnan,
  • Sananda Mondal,
  • Megha Bagariya,
  • Khanjan Trivedi,
  • Debasish Panda,
  • Arup Ghosh

摘要

The adoption of biostimulants to augment agricultural productivity has garnered increasing attention on a global scale, with particular interest directed towards seaweed extracts. Among these, Kappaphycus alvarezii seaweed extract (KSWE) has emerged as a promising candidate for its multifaceted benefits encompassing enhanced nutrient assimilation, augmented photosynthetic activity, hormonal modulation, and fortification of plant defense mechanisms. While existing literature underscores its favorable impact across various crop species, there are conspicuous gaps in knowledge pertaining to the response of different crop varieties to KSWE within specific agro-climatic situation. This study aimed to address this by examining two black gram (Vigna mungo) varieties, TAU-1 and DBGV-5, and their response to KSWE application when grown in the same geographical location over two consecutive years. The results showed significant improvements in growth parameters such as leaf area, leaf area index, photosynthetic rates, and vegetative dry matter accumulation (DMA) at an optimum concentration of 5% KSWE (0.02% TSS w/v), beyond which no additional advantage was apparent. However, at 15% KSWE the DMA was significantly lower than the control at harvest in 2019 and at 43 days after sowing in 2020. The effects on nitrogen fixation as evidenced by total amino acid, nitrate and ureide content in the xylem exudates were inconsistent across applied concentrations, growth stages, and varieties, thereby highlighting that they were not influenced by KSWE. The variability in responses for several growth, yield and quality attributes across different years underscores the importance of considering seasonal factors, emphasizing the necessity for a comprehensive understanding of the effects of seasonal changes on plant responses due to KSWE application.