Title: Effects of Different Sources of Nitrogen Fertilizer on Nitrogen Metabolism after Anthesis and Soil Nitrate Accumulation of High-yielding Wheat in North Henan
Abstract:This study was concerned about the effects of different sources of nitrogen fertilizer on nitrogen metabolism of wheat after anthesis and soil nitrate accumulation.To study the different effects of fi...This study was concerned about the effects of different sources of nitrogen fertilizer on nitrogen metabolism of wheat after anthesis and soil nitrate accumulation.To study the different effects of five treatments(100% inorganic nitrogen,25% organic nitrogen + 75% inorganic nitrogen,50% organic nitrogen + 50% inorganic nitrogen,75% organic nitrogen + 25% inorganic nitrogen and 100% organic nitrogen individually) on GS activity,free amino acid content in the flag leaf and kernel,nitrogen use efficiency,yield,protein accumulation of grain,and NO3-N content in different soil layers from 0 to 100cm were investigated with aikang-58 as tested material under field conditions.The results showed that compared with 100% inorganic nitrogen and 100% organic nitrogen treatment,the three mixed fertilizer treatments were able to promote GS activity,increase free amino acid content in leaves and kernels,and improve grain yield,protein accumulation of grain and nitrogen use efficiency.Among which the treatment of 50% inorganic nitrogen + 50% organic nitrogen reached the highest grain yield(11 124.08 kg/ha),protein accumulation of grain(1 231.70 kg/ha) and nitrogen use efficiency(46.381 g/g).Besides,the NO3-N content in each soil layers was decreased as a result of the increasing organic nitrogen.Meanwhile,the three mixed fertilizer treatments reduced the NO3-N pollution.It concluded that the 50% inorganic nitrogen + 50% organic nitrogen treatment worked best among the five treatments,which was an environment-friendly way of fertilizing in the North of Henan.Read More
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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