کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6374660 | 1624679 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nitrogen management for zero till wheat with surface retention of rice residues in north-west India
ترجمه فارسی عنوان
مدیریت نیتروژن برای صفر تا گندم با حفظ سطوح مانده برنج در شمال غرب هند
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کلمات کلیدی
فرآوری آمونیاک، خوش شانس بذر مدیریت نیتروژن، استفاده از نیتروژن بهره وری، باقی مانده برنج، گندم صفر،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
In intensive rice-wheat systems of north-west (NW) India, surface retention of rice residues in wheat has been recommended instead of burning. Optimum nitrogen (N) management for zero till (ZT) wheat sown into rice residues may to differ from that of conventional practice (in-situ burning of residues followed by intensive tillage prior to sowing). Therefore, we conducted several on-farm and on-station field experiments in 2007-2008 to 2012-2013 to evaluate N management practices for ZT wheat sown into rice residues using the Happy Seeder. The optimum N rate for wheat planted into rice residues in fields with no or only a short history of rice residue retention was 120 kg N haâ1, the current recommendation for conventional practice. Short-term (up to 20 d) soil N mineralization was lower in undisturbed soil than disturbed soil, while the total amount of N mineralization was similar after 40 d, suggesting that over the crop season, total soil N mineralization may be similar in tilled and non-tilled soil. Ammonia volatilization loss from urea broadcast over the residue covered surface, followed by irrigation, was low (<2 kg haâ1) regardless of time of urea application. Band placement of 20% of the fertilizer N as diammonium phosphate at seeding, and topdressing of the remaining 80% as urea in two equal doses before first and second irrigations produced higher grain yield and N use efficiency than other treatments. However, surface residue retention reduces the rate of soil drying and in some situations this delays the time of the second irrigation and thus N fertilizer application beyond the optimum time. Therefore, the effect of banding various proportions of the urea N between the rows at sowing was investigated. The results showed that, on a loam soil, up to 75% of the recommended N fertilizer can be applied at sowing, 24 kg N haâ1 as DAP with the seed and 66 kg N haâ1 as urea drilled between every second wheat row, without loss of yield. In conclusion, a better applied N management strategy for ZT wheat than currently practiced is drilling of 24 kg N haâ1 as diammonimum phosphate into the soil at seeding followed by two top-dressings of 48 kg N haâ1 each just prior to first and second irrigations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 184, December 2015, Pages 183-191
Journal: Field Crops Research - Volume 184, December 2015, Pages 183-191
نویسندگان
Yadvinder-Singh Yadvinder-Singh, Manpreet Singh, H.S. Sidhu, E. Humphreys, H.S. Thind, M.L. Jat, J. Blackwell, Vicky Singh,