کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5761520 | 1624657 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimising nitrogen fertilisation: A key to improving nitrogen-use efficiency and minimising nitrate leaching losses in an intensive wheat/maize rotation (2008-2014)
ترجمه فارسی عنوان
بهینه سازی کود نیتروژن: کلید بهبود بهره وری استفاده از نیتروژن و به حداقل رساندن تلفات نیترات لجن در یک چرخش شدید گندم / ذرت (201-2015)
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Optimising nitrogen (N) fertilisation is critically important for obtaining high crop yields with low environmental costs. A seven-year field experiment was conducted to evaluate the effects of the rate of N application on crop yield, N-use efficiency (NUE), nitrate residue (NR), and nitrate leaching in an intensive wheat/maize rotation system on the Loess Plateau of China. Five treatments were tested: a control (no N fertilisation) and conventional, low, moderate, and high rates of N fertilisation. Nitrates were leached mainly after heavy rains and with flood irrigation and varied notably between years. Annual nitrate-leaching loss (ANLL) averaged 3.4-17.3 kg N haâ1 yâ1 at N rates of 165-495 kg N haâ1. Crop yields increased quadratically and NUE decreased linearly with increasing rates of N application. NR and ANLL increased exponentially. Compared with conventional management, moderate N fertilisation increased NUE and decreased NR and ANLL by 46 and 34%, respectively, without any significant decrease in crop yield. High yields can thus be achieved at a moderate N rate and an economically optimal N rate with less ANLL and acceptable soil NR. We recommend N-application rates of 150-170 and 180-200 kg N haâ1 for wheat and maize, respectively, for obtaining high crop yields with low environmental risks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 206, May 2017, Pages 1-10
Journal: Field Crops Research - Volume 206, May 2017, Pages 1-10
نویسندگان
Xianlong Yang, Yongli Lu, Yan Ding, Xiaofang Yin, Sajjad Raza, Yan'an Tong,