Scholarlink

<p>Application of nitrogen fertilizer is a common, yet important, practice under rainfed production systems. However, N fertilization often poses the environmental risk, which needs to be mitigated while ensuring the sustainable crop productivity. Therefore, a field trial was conducted from 2017 to 2023 to explore the effect of gradual substitution of inorganic nitrogen by organic nitrogen under rainfed conditions on soil properties, carbon sequestration and crop performance. The experiment comprised of eleven inorganic, organic and integrated treatments of nitrogen set-up in a randomized block design replicated thrice. The results highlighted that application of 100% nitrogen, phosphorous, potassium (NPK) + farmyard manure (FYM) 10 tons ha<sup>− 1</sup> (T<sub>8</sub>) significantly improved soil properties, crop yield and water use efficiency over control, 100% N and 100% NP. The treatment T<sub>8</sub> significantly improved soil moisture content against all other treatments except 50% NPK + FYM 10 tons ha<sup>− 1</sup> (T<sub>7</sub>) and 100% N through FYM + biofertilizers, which enabled the crops to withstand moisture stress and enhanced moisture retention capacity thereby resulting in higher yields under rainfed conditions. Moreover, T<sub>8</sub> resulted in higher system-productivity (7569&#xa0;kg ha<sup>− 1</sup>), sustainable-yield-index (0.72 for maize and 0.58 for wheat), soil organic carbon (SOC, 5.67&#xa0;g kg<sup>− 1</sup>), SOC-stock (11.96 Mg ha<sup>− 1</sup>) and SOC-sequestration rate (560.25&#xa0;kg ha<sup>− 1</sup> year<sup>− 1</sup>) over other treatments. Grain yield of maize (3711&#xa0;kg ha<sup>− 1</sup>) and wheat (4292&#xa0;kg ha<sup>− 1</sup>) in T<sub>8</sub> was 14–21% and 6–13% higher than 100% NPK treatments and 1.7 and 1.3 times than control, respectively. The results demonstrated that T<sub>7</sub> significantly maintained SOC, bulk density and crop yield, but reduced available nitrogen and potassium as compared to T<sub>8</sub>. Therefore, to maintain soil fertility and crop yield over time, farmers should apply the recommended dose of NPK alongwith 10 tons FYM ha<sup>− 1</sup>.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Long-term integrated nitrogen management: effects on crop productivity, soil properties, and carbon sequestration potential of a rainfed maize-wheat cropping system in Punjab, India

  • 期刊论文

  • 发表日期：

    2026年4月20日

查看全文
  • Mohammad Amin Bhat,
  • MJ Singh,
  • Abrar Yousuf,
  • Anil Khokhar,
  • Parminder Singh Sandhu,
  • Kanwar Barjinder Singh,
  • Balwinder Singh Dhillon,
  • Randeep Singh,
  • Priya P. Gurav,
  • S. Kundu,
  • Chary G. Ravindra,
  • J. V. N. S. Prasad,
  • V. K. Singh

摘要

Application of nitrogen fertilizer is a common, yet important, practice under rainfed production systems. However, N fertilization often poses the environmental risk, which needs to be mitigated while ensuring the sustainable crop productivity. Therefore, a field trial was conducted from 2017 to 2023 to explore the effect of gradual substitution of inorganic nitrogen by organic nitrogen under rainfed conditions on soil properties, carbon sequestration and crop performance. The experiment comprised of eleven inorganic, organic and integrated treatments of nitrogen set-up in a randomized block design replicated thrice. The results highlighted that application of 100% nitrogen, phosphorous, potassium (NPK) + farmyard manure (FYM) 10 tons ha− 1 (T8) significantly improved soil properties, crop yield and water use efficiency over control, 100% N and 100% NP. The treatment T8 significantly improved soil moisture content against all other treatments except 50% NPK + FYM 10 tons ha− 1 (T7) and 100% N through FYM + biofertilizers, which enabled the crops to withstand moisture stress and enhanced moisture retention capacity thereby resulting in higher yields under rainfed conditions. Moreover, T8 resulted in higher system-productivity (7569 kg ha− 1), sustainable-yield-index (0.72 for maize and 0.58 for wheat), soil organic carbon (SOC, 5.67 g kg− 1), SOC-stock (11.96 Mg ha− 1) and SOC-sequestration rate (560.25 kg ha− 1 year− 1) over other treatments. Grain yield of maize (3711 kg ha− 1) and wheat (4292 kg ha− 1) in T8 was 14–21% and 6–13% higher than 100% NPK treatments and 1.7 and 1.3 times than control, respectively. The results demonstrated that T7 significantly maintained SOC, bulk density and crop yield, but reduced available nitrogen and potassium as compared to T8. Therefore, to maintain soil fertility and crop yield over time, farmers should apply the recommended dose of NPK alongwith 10 tons FYM ha− 1.