کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8487294 1552019 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biochar and manure amendments impact soil nutrients and microbial enzymatic activities in a semi-arid irrigated maize cropping system
ترجمه فارسی عنوان
اصلاحات زیست بوم و کود در مواد مغذی خاک و فعالیت های آنزیمی میکروبی در یک سیستم کشت زراعی نیمه خشک
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی
To mitigate negative impacts on crop yield from water-saving limited irrigation, we tested the effect of two organic amendments on soil moisture and nutrients. In an experimental maize field in northern Colorado, we tilled in conventional steer manure (30 Mg ha−1) and fast-pyrolysis pine-wood biochar (30 Mg ha−1). We quantified impacts on gravimetric soil moisture, total carbon and nitrogen, mineral nitrogen, available phosphorus, microbial biomass, and seven extracellular enzymatic activities (EEAs). Compared to the control, manure amendments increased gravimetric soil moisture by approximately 15%, total nitrogen by 10%, available phosphorus by 45%, and microbial biomass carbon by 15% (p < 0.05). Relative to the control, biochar increased total soil carbon by 80% and altered EEAs (p < 0.05). Biochar significantly increased α-1,4- glucosidase, β-d-cellobiohydrolase, and β-1,4-N-acetylglucosaminidase and significantly decreased β-1,4-glucosidase and phosphatase activities (p < 0.05). Despite the effects on soil moisture, nutrient availability, and microbial dynamics, neither amendment significantly impacted maize yield under limited irrigation. Ongoing measurements will allow us to fully assess longer-term impacts on yield.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 233, 3 October 2016, Pages 404-414
نویسندگان
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