کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4381012 1304045 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Does the white clover response to sulphur availability correspond to phenotypic or ontogenetic plasticity?
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Does the white clover response to sulphur availability correspond to phenotypic or ontogenetic plasticity?
چکیده انگلیسی
Three concentrations of SO42−, “Low S” (0.009 mM), “Medium S” (0.384 mM) and “High S” (1.509 mM), were used to grow plants in a hydroponic system. S availability modified biomasses significantly only at the end of the experiment (11 weeks). Medium S appeared optimal while Low S induced a lower aboveground dry mass. An appropriate S availability (Medium S) not only increased S content but also increased N content by stimulating N2 fixation. Plant growth analysis using growth fitted curves and the calculation of RGR revealed that S effects on biomass corresponded to the production of different phenotypes and not to a growth delay. This work shows that the acceleration growth phase (49-56 days) is a key period for the nutritional needs of white clover and should be the best period for a sulphur fertilisation regime that aims to enhance white clover fitness.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Oecologica - Volume 35, Issue 3, May–June 2009, Pages 452-457
نویسندگان
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