کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6773163 | 1431825 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of wheat straw addition on dynamics and fate of nitrogen applied to paddy soils
ترجمه فارسی عنوان
اثر افزودن کاه گندم بر پویایی و سرنوشت نیتروژن مورد استفاده در خاک های برنج
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کلمات کلیدی
گردش مالی نیتروژن-کانه زایی، افزودنی گیاهی، در دسترس بودن نیتروژن،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
The effectiveness of plant residue addition to increase crop nitrogen (N) use efficiency while reducing N losses is dependent on whether residue management can improve the match between N immobilization-mineralization turnover and plant demand. To understand the effects of residue management on N cycle processes, we conducted a field study that included three treatments. These were a control without N fertilizer (CK), 15N-labelled urea (UR), and 15N-labelled ureaâ¯+â¯wheat straw (URS). Nitrogen immobilized in the top soil layer (0-20â¯cm) in the urea only treatment tended to decrease after the basal application and the second top dressing, but increased after the first top dressing, whereas the ureaâ¯+â¯straw treatment increased immobilization up to the second top dressing, before decreasing towards the end of the study. The addition of wheat straw led to a 24% reduction in ammonia loss after the basal application, corresponding well to lower soil extractable ammonium contents. The N uptake by the plant in the ureaâ¯+â¯straw treatment corresponded to 25% of applied N, which was higher than the 20% recorded in the urea only treatment. At harvest, 31% of the applied N was found in the 0-60â¯cm soil layer after the addition of wheat straw, whereas there was only 25% without straw addition. The results showed that 45% applied N was unaccounted for when wheat straw was added, compared to 55% unaccounted for without wheat straw. These indicate that the addition of wheat straw may increase plant N uptake by contributing to N immobilization early in the season, but then improving its subsequent mineralization later in the season.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil and Tillage Research - Volume 178, May 2018, Pages 92-98
Journal: Soil and Tillage Research - Volume 178, May 2018, Pages 92-98
نویسندگان
Yansheng Cao, Huifeng Sun, Jining Zhang, Guifa Chen, Haitao Zhu, Sheng Zhou, Huayun Xiao,