Root length of winter wheat and the content of mineral nitrogen in soil profile
1996
Haberle, J. | Svoboda, P. | Ruzek, P. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
Winter wheat (cv. 6egina) root length (RL) distibution and the content of mineral N (Nanorg, NO3-N + NH4-N) in soil profile during spring were determined in two year field experiment on sandy loam soil. Total root length at heading reached on average 7.8 km.m-2 in 1993, and 14.9 km.m-2 in 1994. Root length density decreased exponentially from surface layers to subsoil. In early spring rooting depth and density gave no access to supply of mineral N under depth of 20-25 cm, wheat plants reached only the start of tillering stage in the time. In the course of tillering and stem elongation the rooted volume of soil and thus the potentially available supply of N increased with increased root depth and density in subarable layers. However, even in the period of heading, the substantial amount of N washed to layers under 60-80 cm depth, was not readily available for wheat crop.
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