کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8970750 | 1552155 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reducing environmental impacts of agriculture by using a fine particle suspension nitrification inhibitor to decrease nitrate leaching from grazed pastures
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
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![عکس صفحه اول مقاله: Reducing environmental impacts of agriculture by using a fine particle suspension nitrification inhibitor to decrease nitrate leaching from grazed pastures Reducing environmental impacts of agriculture by using a fine particle suspension nitrification inhibitor to decrease nitrate leaching from grazed pastures](/preview/png/8970750.png)
چکیده انگلیسی
Nitrate (NO3â) leaching from intensively grazed pasture systems, e.g. dairy farming, is of increasing environmental concern worldwide. The major source of the NO3â leached in grazed pastures is the nitrogen (N) returned in the urine from the grazing animal. The objective of this study was to use undisturbed soil monolith lysimeters to quantify the effectiveness of treating a grazed pasture soil with a fine particle suspension (FPS) nitrification inhibitor, dicyandiamide (DCD), in decreasing NO3â leaching losses from a deep sandy soil with a mixture of perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.) pasture. The application of DCD as a FPS at 10 kg haâ1 in autumn (May) and late winter (August) decreased NO3â-N leaching from 134 kg N haâ1 yearâ1 to 43 kg N haâ1 yearâ1 (equivalent to a 68% reduction) from the dairy cow urine N applied in the autumn (May) at the rate of 1000 kg N haâ1. This reduced the annual average NO3â-N concentration under the urine patch from 43 mg NO3â-N Lâ1 to 18 mg NO3â-N Lâ1. The DCD FPS also reduced Ca2+ leaching by 51% and Mg2+ leaching by 31%. In addition, herbage dry matter yield in the urine patch areas was increased by 33%, from 15.3 t haâ1 yearâ1 without DCD to 20.3 t haâ1 yearâ1 when DCD was applied at 10 kg haâ1. However, DCD applied at 5 kg haâ1 (May and August) did not provide significant environmental and agronomic benefits under the experimental conditions. Results from this study when compared with those reported previously show that DCD, when applied as a FPS at 10 kg active ingredient haâ1, is just as effective in reducing NO3â leaching in grazed pasture soils, as when it is applied as a solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 109, Issues 3â4, 1 September 2005, Pages 202-212
Journal: Agriculture, Ecosystems & Environment - Volume 109, Issues 3â4, 1 September 2005, Pages 202-212
نویسندگان
H.J. Di, K.C. Cameron,