Scholarlink

<p>Excessive fertilization poses critical threats to soil health and compromises ecosystem multi-functionality in intensive rice-wheat cropping system. Strategic long-term effects of integrated nutrient management (INM) practices emerge as a vital pathway toward nutrients cycling enzymes, microbial composition and soil functional diversity.&#xa0;To address this, a field study was planned to investigate the long-term biogeochemical changes occurring in the soil under seven nutrient management combinations of fertilizer nutrients alone and their partial substitution (50% nitrogen) with organic sources either through farmyard manure (FYM) or wheat cut straw (WCS) or green manure (GM) in rice, whereas, 100% recommended dose of fertilization was applied to wheat in all treatments except absolute control.&#xa0;These results revealed that after 40th cycles of continuous rice-wheat cropping, NPK<sub>50</sub> + FYM treatment exhibited higher geometric mean of enzyme activities, Shannon’s diversity index, Simpson-Yule index, soil alteration index 2 (AI2) and integrated total enzyme activity (TEI) by ~ 49, 18, 4, 54 and 33%, respectively than NPK<sub>100</sub>. Principal component analysis identified TEI, AI3 and AI1 as the most sensitive and influential variables for assessing soil quality.&#xa0;These findings highlight that long-term reductions in inorganic fertilizer use can degrade soil quality and soil enzymes based functional indices. However, addition of organic amendments through FYM, WCS and GM enhance nutrient availability to reconcile soil health restoration and clean production in intensive cropping systems.</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

Continuous Integrated Nutrient Management Practices for 40 Years Promote Soil Enzyme-based Functional Indices in Rice-wheat System

  • 期刊论文

  • 发表日期：

    2026年2月14日

查看全文
  • Tanushree Ghosh,
  • Sandeep Sharma,
  • SS Walia

摘要

Excessive fertilization poses critical threats to soil health and compromises ecosystem multi-functionality in intensive rice-wheat cropping system. Strategic long-term effects of integrated nutrient management (INM) practices emerge as a vital pathway toward nutrients cycling enzymes, microbial composition and soil functional diversity. To address this, a field study was planned to investigate the long-term biogeochemical changes occurring in the soil under seven nutrient management combinations of fertilizer nutrients alone and their partial substitution (50% nitrogen) with organic sources either through farmyard manure (FYM) or wheat cut straw (WCS) or green manure (GM) in rice, whereas, 100% recommended dose of fertilization was applied to wheat in all treatments except absolute control. These results revealed that after 40th cycles of continuous rice-wheat cropping, NPK50 + FYM treatment exhibited higher geometric mean of enzyme activities, Shannon’s diversity index, Simpson-Yule index, soil alteration index 2 (AI2) and integrated total enzyme activity (TEI) by ~ 49, 18, 4, 54 and 33%, respectively than NPK100. Principal component analysis identified TEI, AI3 and AI1 as the most sensitive and influential variables for assessing soil quality. These findings highlight that long-term reductions in inorganic fertilizer use can degrade soil quality and soil enzymes based functional indices. However, addition of organic amendments through FYM, WCS and GM enhance nutrient availability to reconcile soil health restoration and clean production in intensive cropping systems.