Journal
PESQUISA AGROPECUARIA BRASILEIRA
Volume 41, Issue 6, Pages 1007-1013Publisher
EMPRESA BRASIL PESQ AGROPEC
DOI: 10.1590/S0100-204X2006000600017
Keywords
root system; stable isotope; nitrogen; soil profile
Categories
Ask authors/readers for more resources
The objective of this work was to evaluate a method to determine sugarcane roots with active metabolism and its distribution and growth in the soil profile, by using isotopic dilution technique with N-15. The experimental design was in randomized blocks, the split plot was considered in relation to time. The N-15 tracer was applied in the leaves of the plants as urea solution. After the harvest of the above ground part of sugarcane plants, trenches were opened and the soil + roots samples were taken by monolite. The isotopic dilution method with N-15 allowed evaluating active root mass and the root distribution in the soil. There is a larger percentual distribution of the roots with active metabolism in depth than in the surface of the profile, which stands for, respectively, 31% in the layer of 0.6-0.8 m and 23% in the layer of 0.0-0.2 m. The method also made possible to determine the roots with active metabolism that remained in the soil after sieve, that was 35%, showing the importance of determining these roots.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available