کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4568008 | 1331286 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Estimated nitrogen use efficiency, surplus, and partitioning in young apple trees grown in varied organic production systems Estimated nitrogen use efficiency, surplus, and partitioning in young apple trees grown in varied organic production systems](/preview/png/4568008.png)
A certified organic apple (Malus × domestica Borkh.) orchard was established to study the interaction of ground cover management systems (GMS) and nutrient sources (NS) on nitrogen (N) use efficiency and N surplus in the Southern U.S. for three years. Trees treated with green compost (GC) and wood chips (WC), regardless of the NS, had greater N accumulation and leaf N use efficiency compared to the shredded paper or mow-and-blow treated trees. The WC-treated trees had comparably low N surplus relative to the GC trees that induced more [NO3−] in soil or soil solution in the rooting zone in September in year 3. GC trees had the highest [NO3−] mineralization in the soil during winter. GMS had greater overall effects on the tree response variables than did the NS.
► GC and WC trees filled their allocated space in year 3 but SP and MB did not.
► GC plots could have been high risk of potential surplus N.
► WC plots could be the best GMS from the environmental or production point of view.
► GMS had greater overall effects on the tree response variables than did the NS.
Journal: Scientia Horticulturae - Volume 129, Issue 4, 27 July 2011, Pages 674–679