کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5761400 | 1624649 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improving nitrogen use efficiency with minimal environmental risks using an active canopy sensor in a wheat-maize cropping system
ترجمه فارسی عنوان
بهبود بهره وری استفاده از نیتروژن با حداقل مخاطرات زیست محیطی با استفاده از یک سنسور فعال سایبان در یک سیستم برداشت گندم-ذرت
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کلمات کلیدی
Plant nitrogen uptakeGHGFNPPFPNitrate leaching - اشباع نیتراتGreenhouse gas emission - انتشار گازهای گلخانه ایagronomic efficiency - بازده زراعتیRecovery efficiency - بهره وری بازیافتpartial factor productivity - بهره وری عامل جزئیSustainable development - توسعه پایدارnormalized difference vegetation index - شاخص تنوع گیاه شناسی نرمال شدهNDVI - شاخص نرمالشده تفاوت پوشش گیاهی Nitrogen - نیتروژنPnu - پونهPrecision agriculture - کشاورزی دقیقIntensive agriculture - کشاورزی شدیدGreenhouse gas - گاز گلخانه ای
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Nitrogen (N) management needs to be significantly improved to address the triple challenge of global food security, environmental pollution and climate change. In addition to being site-specific, dynamic in-season management is needed to respond to temporal variability in soil N supply and crop N demand. Active canopy sensor-based precision N management (CS-PNM) aims to match N supply with crop N demand in both space and time. Studies that systematically compare this strategy with other N management strategies are limited, especially in intensively farmed regions of developing countries. The objective of this study was to compare CS-PNM strategy in terms of agronomic and environmental impacts in comparison with farmer's N practice, regional optimum N management, modified Green Window-based N Management and soil test-based in-season root zone N management for an intensive winter wheat (Triticum aestivum L.) and summer maize (Zea mays L.) rotation system in North China Plain. A field experiment was conducted from 2008 to 2012 in Quzhou, Hebei Province of China to evaluate these systems. The CS-PNM strategy was consistently better for both crops than the other tested strategies. In comparison with farmer's practice and regional optimum N management, the CS-PNM strategy reduced N fertilizer applications by 62% and 36%, increased N use efficiencies by 68-123% and 20-61%, decreased apparent total N losses by 81% and 57%, and lowered intensities of total N2O emission, greenhouse gas emission and reactive N losses by 54-68% and 20-42%, respectively. Here we demonstrate that relative to current N management strategies, the CS-PNM strategy has significant potential to improve N use efficiencies and mitigate environmental degradation for sustainable intensification of agriculture in developing countries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 214, December 2017, Pages 365-372
Journal: Field Crops Research - Volume 214, December 2017, Pages 365-372
نویسندگان
Qiang Cao, Yuxin Miao, Guohui Feng, Xiaowei Gao, Bin Liu, Yuqing Liu, Fei Li, Raj Khosla, David J. Mulla, Fusuo Zhang,