کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8487092 | 1551993 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nitrogen management in crop rotations after the break-up of grassland: Insights from modelling
ترجمه فارسی عنوان
مدیریت نیتروژن در گیاهان پس از تجزیه چمنزار: بینش از مدل سازی
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Evaluation data consisted of two rotation types over two years (maize-maize and barley-mustard-maize) with two nitrogen (N) fertilizer schemes (zero and standard fertilizer: 160 for maize and 120â¯kgâ¯N/ha for barley) after the break-up of grassland. Experiments were carried out at three different sites with contrasting soils in north-west Germany. Results showed that APSIM was capable of simulating the crop rotations and fertilizer applications satisfactorily: Total biomass (nâ¯=â¯21) was reproduced with a root mean square error (RMSE) of 1139â¯kg/ha against an observed mean of 9915â¯kg/ha across crops. Total N uptake (nâ¯=â¯21) was simulated well with a RMSE of 22â¯kg/ha (against observed mean 144â¯kg/ha). Simulated soil mineral N in the top 0-30â¯cm (nâ¯=â¯253) and 0-90â¯cm (nâ¯=â¯33) showed a high index of agreement (IA) of 0.90 and 0.86, respectively. Comparisons observed vs simulated over time confirmed that APSIM was able to capture the N dynamics in the soil. Extractable soil water was also modelled well. Leached nitrate (nâ¯=â¯16) was simulated with a RMSE of 50â¯kgâ¯N/ha, whereby APSIM captured the high nitrate losses of up to 240â¯kgâ¯N/ha/winter period caused by the high mineralization and the fertilization. In the long-term the simulation experiment showed that fertilization of maize did not result in additional biomass, but in higher leaching losses. Mustard was effective in reducing nitrate leaching but is difficult to implement in practice. Finally, the study demonstrated that crop modelling complements conventional analysis very well in identifying environmentally sound and profitable management practices for complex situations in soil-crop systems such as grassland break-up.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 259, 1 May 2018, Pages 28-44
Journal: Agriculture, Ecosystems & Environment - Volume 259, 1 May 2018, Pages 28-44
نویسندگان
Munir P. Hoffmann, Johannes Isselstein, Reimund P. Rötter, Manfred Kayser,