کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2025030 | 1069976 | 2011 | 4 صفحه PDF | دانلود رایگان |
A wheat seedling rhizobox approach was used to differentiate between the rhizosphere and non-rhizosphere (bulk) soil amended with low and high rates of biochar (20 and 60 t ha−1 vs. control). Nitrate (NO3−) was added as the main nitrogen (N) source because emerging biochar research points to reduced NO3− loss through leaching and gaseous loss as nitrous oxide. The rhizosphere under the different treatments were distinct (P = 0.021), with greater soil-NO3− and biochar-NO3− contents in the high biochar treatment. Biochar addition increased wheat root length ratio (P = 0.053) and lowered root N uptake (P = 0.017), yet plant biomass and N content were similar between treatments. The results indicate localisation of NO3− within the rhizosphere of biochar-amended soils which has implications for NO3− loss and improved nitrogen use efficiency.
► Biochar localises nitrate within the rhizosphere of wheat.
► N concentrations differed in rhizosphere, bulk and biochar environments.
► Biochar increased root length ratio, but decreased root N uptake.
► Results indicate a biochar and nutrient use efficiency synergy.
Journal: Soil Biology and Biochemistry - Volume 43, Issue 11, November 2011, Pages 2243–2246