ENHANCING NITROGEN USE EFFICIENCY OF POTATO AND CEREAL CROPS BY OPTIMIZING TEMPERATURE,MOISTURE, BALANCED NUTRIENTS AND OXYGEN BIOAVAILABILITY |
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| Authors: | Guodong Liu Yuncong Li Ashok K Alva David M Porterfield James Dunlop |
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| Institution: | 1. Horticultural Sciences Department , University of Florida , Gainesville , Florida , USA;2. Vegetable and Forage Crops Research Laboratory , USDA-ARS , Prosser , Washington , USA;3. Department of Agricultural and Biological Engineering , Purdue University , West Lafayette , Indiana , USA;4. AgResearch Grasslands Research Centre , Palmerston North , New Zealand |
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| Abstract: | Enhancement of nutrient use efficiency is imperative for increasing economic returns and reducing environmental pollution caused by fertilizer use in crop production systems. In this paper, we have demonstrated at a given soil temperature and nitrogen (N) rate, N loss via ammonia emission at 80% field capacity (FC) soil water regime in potato production was decreased by 58 to 81% compared to that at 20% FC, in two soils. In another study, N uptake by flooded corn (genotype: FR27 × FRMO17) seedlings with oxygen fertilization was 8-fold greater than that without oxygen fertilization. Nitrogen utilization efficiency of wheat (cv. ‘Yanzhong 144’) seedlings grown in a complete nutrient solution was 10-fold greater than that of the seedlings under low-phosphorus stress. It is concluded that appropriate management of soil water, oxygen fertilization, and of well-balanced nutrients supply significantly enhance N uptake and utilization efficiencies of corn and wheat, and minimize N loss. |
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| Keywords: | corn oxygen fertilization soil moisture soil temperature wheat |
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