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In-Season Prediction of Nitrogen Use Efficiency and Grain Protein in Winter Wheat (Triticum aestivumL.)

التفاصيل البيبلوغرافية
العنوان: In-Season Prediction of Nitrogen Use Efficiency and Grain Protein in Winter Wheat (Triticum aestivumL.)
المؤلفون: Natasha Macnack, Bee Chim Khim, Jeremiah Mullock, William Raun
المصدر: Communications in Soil Science and Plant Analysis. 45:2480-2494
بيانات النشر: Informa UK Limited, 2014.
سنة النشر: 2014
مصطلحات موضوعية: Winter wheat, Soil Science, chemistry.chemical_element, Sowing, Growing degree-day, engineering.material, Nitrogen, Normalized Difference Vegetation Index, chemistry, Agronomy, Air temperature, engineering, Grain yield, Fertilizer, Agronomy and Crop Science, Mathematics
الوصف: In a 3-year study, grain yield, nitrogen use efficiency (NUE), and grain protein (GP) were evaluated as a function of rate and timing of nitrogen (N) fertilizer application. Linear models that included preplant N, normalized difference vegetation index (NDVI), cumulative rainfall, and average air temperature from planting to sensing (T-avg) were evaluated to predict NUE and GP in winter wheat. GreenSeeker readings were collected at Feekes (F) 3, 4, 5, and 7 growth stages. Combined with rainfall and/or T-avg, NDVI alone was not correlated with NUE. However, NDVI and rainfall explained 45% (r2 = 0.45) of the variability in GP at F7 growth stage. Preplant N, NDVI, rainfall and growing degree days (GDD) combined explained 76% (r2 = 0.76) of the variability in GP at F3. Mid-season climatic data improved the prediction of GP and should therefore be considered for refining fertilizer recommendations when GP levels are expected to be low.
تدمد: 1532-2416
0010-3624
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::df15541b0b7efb5c8bf3590a9299ab70
https://doi.org/10.1080/00103624.2014.904337
حقوق: OPEN
رقم الأكسشن: edsair.doi...........df15541b0b7efb5c8bf3590a9299ab70
قاعدة البيانات: OpenAIRE
الوصف
تدمد:15322416
00103624