کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4382275 | 1617808 | 2014 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improving soil structure by promoting fungal abundance with organic soil amendments
ترجمه فارسی عنوان
بهبود ساختار خاک با افزایش فراوانی قارچ با اصلاح خاک ارگانیک
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کلمات کلیدی
TOCNMSLMAMRPPSOM - WHOergosterol - ارگوسترولSoil amendments - اصلاحات خاکAggregation - تجمعMicrobial community - جامعه میکروبیFungi - قارچSoil organic matter - ماده آلی خاکFatty acid methyl ester - متیل استر اسید چربFAME یا fatty acid methyl esters - متیل استرهای اسید چربfatty acid methyl esters - متیل استرهای اسید چربnon-metric multidimensional scaling - مقیاس چند بعدی غیر متریکTotal organic carbon - کل کربن آلی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
Building soil structure in agroecosystems is important because it governs soil functions such as air and water movement, soil C stabilization, nutrient availability, and root system development. This study examined, under laboratory conditions, effects of organic amendments comprised of differing proportions of labile and semi-labile C on microbial community structure and macroaggregate formation in three variously textured soils where native structure was destroyed. Three amendment treatments were imposed (in order of increasing C lability): vegetable compost, dairy manure, hairy vetch (Vicia villosa Roth). Formation of water stable macroaggregates and changes in microbial community structure were evaluated over 82 days. Regardless of soil type, formation of large macroaggregates (LMA, >2000 μm diameter) was highest in soils amended with vetch, followed by manure, non-amended control, and compost. Vetch and manure had greater microbially available C and caused an increase in fungal biomarkers in all soils. Regression analysis indicated that LMA formation was most strongly related to the relative abundance of the fungal fatty acid methyl ester (FAME) 18:2Ï6c (r = 0.55, p < 0.001), fungal ergosterol (r = 0.58, p < 0.001), and microbial biomass (r = 0.57, p < 0.001). Non-metric multidimensional scaling (NMS) ordination of FAME profiles revealed that vetch and manure drove shifts toward fungal-dominated soil microbial communities and greater LMA formation in these soils. This study demonstrated that, due to their greater amounts of microbially available C, vetch or manure inputs can be used to promote fungal proliferation in order to maintain or improve soil structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Soil Ecology - Volume 75, March 2014, Pages 13-23
Journal: Applied Soil Ecology - Volume 75, March 2014, Pages 13-23
نویسندگان
Shawn T. Lucas, Elisa M. D'Angelo, Mark A. Williams,