Effects of different chemical combination forms of nitrogen fertilizer on root systen development of alfalfa (Medicago sativa L.) seedlings
2003
Hirose, D. (Minamikyushu Univ., Takanabe, Miyazaki (Japan))
Daisuke HIROSE (2003): Effects of Different Chemical Combination Forms of Nitrogen Fertilizer on Root System Development of Alfalfa (Medicago sativa L.) Seedlings. Glassland Science 49,490-494. The present study investigated root system development in alfalfa after treatment with nitrate nitrogen or ammonium nitrogen. Both the dry weight and total root length of alfalfa grown under conditions of soil culture and water culture were greater for the NH4 plot than for the N03 plot. Under water culture conditions, plants from the N08 and NH3 plots did not significantly differ with respect to taproot length or specific root length of the taproot. In contrast, specific root length of lateral roots was significantly greater in the NHI plot than in the N03 plot at 50 days after sowing. These findings demonstrate that ammonium nitrogen is superior to nitrate nitrogen for the development of the overall roots system as well as for development of lateral roots of alfalfa.
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