کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5538264 | 1552011 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reducing nitrogen leaching in a subtropical vegetable system
ترجمه فارسی عنوان
کاهش میزان اشباع نیتروژن در یک سیستم سبزی سواتروپیک
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Nitrogen (N) leaching is considered a substantial problem in South China vegetable production because of the heavy rainfall and the excessive application of N fertilizer, but quantitative data and effective countermeasures are lacking. A systematic approach to reducing N leaching while maintaining or increasing vegetable yields is urgently needed. A 2-year field study was conducted to quantify N leaching in a subtropical vegetable system (bitter gourd, Momordica charantia L.) in South China and to evaluate how leaching is affected by the following three N management strategies: zero N application (Nno, 0 kg N haâ1), conventional N management (Ncon, 377 kg N haâ1, with NH4+), and optimized N management (Nopt, 300 kg N haâ1, with a combination of NH4+ and NO3â at a reduced rate plus nitrapyrin, a nitrification inhibitor). Lysimeter data indicated that 139 kg N haâ1 per growing season was lost by leaching with Ncon, this represented 36% of the N applied. With Nopt, leaching was reduced by 27.1%, and yield was increased by 25.1%. A combination of NH4+ and NO3â plus nitrapyrin at a reduced rate increased plant N uptake, maintained a high NH4+/NO3â ratio in the soil, and thereby reduced leaching. The alternative N management strategy exemplifies a new way to achieve high yields with low environmental costs in intensive vegetable production systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 241, 1 April 2017, Pages 133-141
Journal: Agriculture, Ecosystems & Environment - Volume 241, 1 April 2017, Pages 133-141
نویسندگان
Baige Zhang, Qiang Li, Jian Cao, Changyuan Zhang, Zhao Song, Fusuo Zhang, Xinping Chen,