The root morphology of new Czech lucerne candivars
2007
Hakl, J.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Picninarstvi a Travnikarstvi | Santrucek, J.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Picninarstvi a Travnikarstvi | Kalista, J.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Picninarstvi a Travnikarstvi | Kocourkova, D.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Picninarstvi a Travnikarstvi
The aim of this paper was to compare root morphology of three new Czech lucerne candivars with the standard variety Jarka under different levels of soil compaction. Three candivars with different ratio of American pasture lucerne varieties in their origin were used. Plot experiment was established in split plot design with four replications and with two average soil bulk densities: 1.39 g/cubic cm and 1.51 g/cubic cm, respectively. Tap-root diameter under crown (TD), lateral root number (LRN), lateral root diameter (LRD) and lateral root position (LRP) were evaluated in plants sampled in spring and autumn. The TD value was positively correlated with LRN and LRD, all these variables were negatively correlated with the stand density. Only the candivar XLII had a significantly lower TD in comparison with the standard variety Jarka, but this trait was not connected with more branched roots or a higher persistence. Significantly lower LRN was observed in all candivars. Increased soil compaction led to a significant reduction in LRP, LRN, and population density. In conclusion, the root morphology of the examined candivars did not differ substantially from that of the standard variety Jarka.
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