کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8879297 1624643 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On-farm assessment of site-specific nutrient management for rainfed lowland rice in the Philippines
ترجمه فارسی عنوان
ارزیابی در مدیریت مزرعه های خاص مواد مغذی مورد استفاده در برنج های داینامیک در
کلمات کلیدی
خشکی، عملکرد دانه، مدیر محصول برنج، کشاورزان شیوه ها، درآمد خالص،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Rice yield in the drought-prone rainfed lowlands is constrained by low availability of nutrients and water. Fertilizer applications currently conducted by farmers may not match the crop demands nor be resource-use efficient. The objective of this study was to characterize the farmers' practices of nutrient management (FP) in rainfed lowland environments, and compare it with the site-specific nutrient management guideline by using decision-support software (Rice Crop Manager; RCM) in terms of rice yield and production cost. On-farm trials were conducted in northern Philippines in the wet seasons of 2011-2014. Average application rate of N, P and K in RCM was 82, 10 and 21 kg ha−1, respectively, while the application rate was 93, 11 and 18 kg ha−1 in FP (n = 93). Grain yield in FP, which ranged from 1.82 to 6.49 t ha−1, was significantly enhanced by RCM by 6% on average (4.48 vs. 4.22 t ha−1). The yield difference was mainly associated with the different N application regimes in RCM and FP. Average number of N applications was 1.94 in FP with 52% of total N applied during the first 15 days after transplanting while there were 2.63 applications in RCM with 29% applied during the first 15 days after transplanting and 44% at panicle initiation, respectively. Total cost for fertilizer was comparable or lower in RCM than FP, and hence the net income was increased by 154 US$ ha−1. The results of this study showed that site-specific nutrient management improved productivity and profitability in rainfed lowlands of the Philippines.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 220, 1 May 2018, Pages 88-96
نویسندگان
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