Scholarlink

<p>Purpose: Straw return is widely recognized for improving soil quality and sustaining crop yield, yet its short‑term effects of its combined application of organic fertilizers on key soil attributes for soil quality assessment remain unclear. Methods: In a two-year field experiment, we evaluated how the combined organic fertilizer and straw return affects soil quality and rice yield in two contrasting soil types: low soil organic carbon (LSOC) and high soil organic carbon (HSOC) soils. A “no‑return” treatment (straw removal) used as the control. Eighteen soil physical, chemical, and biological indicators were measured, and a minimum data set (MDS) was developed to identify key drivers of soil quality. Results: Compared with the control, straw return plus organic fertilizer significantly increased soil organic carbon (SOC, 0.53%–9.12%), dissolved organic carbon (DOC, 62.80%–158.03%), total nitrogen (TN, 3.83–22.96%), and total phosphorus (TP, 2.51%–16.2%) in both LSOC and HSOC soils. Available potassium (AK), available calcium (ACa), available magnesium (AMg), and enzyme (β−glucosidase, BG) activities were also enhanced, leading to increases of 968.80–1148.73 kg ha⁻¹ in rice yield. Multivariate analysis indicated a MDS comprising SOC, DOC, AK, electrical conductivity (EC), BG, and ACa as sufficient to assess soil quality under both SOC regimes. The soil quality index (SQI) increased more rapidly in LSOC than in HSOC soils, with SOC and EC contributing most to overall SQI in the MDS. Moreover, BG activity emerged as a critical biological indicator, underscoring the role of microbial processes in driving soil improvements. Conclusions: Straw return coupled with organic fertilization can rapidly increase key soil properties and crop yield, especially in low-fertility soils. The proposed minimal indicator set offers a streamlined, robust framework for monitoring and managing soil health in paddy fields.</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

Combined Straw Return and Organic Fertilizer Increases Soil Quality in Low-SOC Soils: Evidence from a Soil Quality Assessment

  • 期刊论文

  • 发表日期：

    2026年1月9日

查看全文
  • Guanjun Li,
  • Zhi Ma,
  • Ze Zhang,
  • Qi Zhao,
  • Chaoyun Ying,
  • Shuang Wang,
  • Liang Wei,
  • Cuiyan Wu

摘要

Purpose: Straw return is widely recognized for improving soil quality and sustaining crop yield, yet its short‑term effects of its combined application of organic fertilizers on key soil attributes for soil quality assessment remain unclear. Methods: In a two-year field experiment, we evaluated how the combined organic fertilizer and straw return affects soil quality and rice yield in two contrasting soil types: low soil organic carbon (LSOC) and high soil organic carbon (HSOC) soils. A “no‑return” treatment (straw removal) used as the control. Eighteen soil physical, chemical, and biological indicators were measured, and a minimum data set (MDS) was developed to identify key drivers of soil quality. Results: Compared with the control, straw return plus organic fertilizer significantly increased soil organic carbon (SOC, 0.53%–9.12%), dissolved organic carbon (DOC, 62.80%–158.03%), total nitrogen (TN, 3.83–22.96%), and total phosphorus (TP, 2.51%–16.2%) in both LSOC and HSOC soils. Available potassium (AK), available calcium (ACa), available magnesium (AMg), and enzyme (β−glucosidase, BG) activities were also enhanced, leading to increases of 968.80–1148.73 kg ha⁻¹ in rice yield. Multivariate analysis indicated a MDS comprising SOC, DOC, AK, electrical conductivity (EC), BG, and ACa as sufficient to assess soil quality under both SOC regimes. The soil quality index (SQI) increased more rapidly in LSOC than in HSOC soils, with SOC and EC contributing most to overall SQI in the MDS. Moreover, BG activity emerged as a critical biological indicator, underscoring the role of microbial processes in driving soil improvements. Conclusions: Straw return coupled with organic fertilization can rapidly increase key soil properties and crop yield, especially in low-fertility soils. The proposed minimal indicator set offers a streamlined, robust framework for monitoring and managing soil health in paddy fields.