能够反映植株体内氮素营养水平的氨基酸是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25861' and id < 2171267 and id<>'2171267' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25861' and id > 2171267 and id<>'2171267' order by id asc limit 5