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NO-3 uptake and its partitioning in drought stressed perennial ryegrass ( Lolium perenne L .)

机译:干旱胁迫多年生黑麦草(黑麦草)中NO-3的吸收及其分配

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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.
机译:干旱是限制农作物生产力的主要因素(Boyer,1982),影响着全球45%的农业用地(Bot等,2000)。水的供应似乎是限制植物生长和生产的最重要因素。干旱地区土壤养分吸收受到抑制,土壤干旱减少了有机结合养分的矿化作用(Bloehm等人1992; Walworth,1992),土壤养分通过质量流量和扩散传播(Seiffert等人)。 (1995年),因此可能减少根部表面的养分利用率,这可能导致叶面硝酸盐的消耗(Foyer等人,1998年)。多年生黑麦草(黑麦草)是饲草生态系统中最重要的植物之一。这项技术的目的是利用多年生黑麦草中的15种N追踪法研究氮素吸收和分布的动力学,以响应水分亏缺胁迫的变化。

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