NO－3 uptake and its partitioning in drought stressed perennial ryegrass ( Lolium perenne L .)
Drought is the major limitation to crop productivity (Boyer,1982),and affects up to 45％ of the world agricultural lands (Bot et al.2000).The availability of water seems to be the most important factor limiting plant growth and productively in dry areas.It is well documented that nutrient uptake is inhibited in dry soil.Soil drought decreased mineralization of organically bound nutrients (Bloehm et al.1992 ; Walworth, 1992), and nutrient transport in soil by mass flow and diffusion ( Seiffert et al.1995),and thus may diminish nutrient availability at the root surface, which may lead to foliar nitrate depletion (Foyer et al.1998).Perennial ryegrass ( Lolium perenne L.) is one of the most important plant species in forage ecosystems and used all over the world as a valuable species for turf.The objective of this work is to investigate the kinetics of N uptake and distribution in response to the change of water deficit stress using 15 N‐tracing in perennial ryegrass.
drought stress 15 N‐uptake perennial ryegrass
B.R.Lee Y.L.Jin M.Li W.J.Jung T.H.Kim
Environmental-FriendlYagriculture Research Center (EFARC),BK 21 Research Team for the Control of Ani Environmental-FriendlYagriculture Research Center (EFARC),BK 21 Research Team for the Control of Ani
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）