施氮量对北沙参生长和产量的影响.pdf

() 24( 1): 28~ 30, 2007 J ournal of L a iy ang Ag r icultural Un iv ersity (N atural Sc ience ) : 1001- 3717( 2007) 01- 0028- 03 * 侯玉双, 王月福, 任兰天, 王铭伦, 马东辉 (, 266109) : , , , , 2 , 0~ 210kg/hm , 2 ( 315kg/hm ), , , , , , , , : ; ; ; : R286 : A E ffects of N itrogen App lication Am ount on the G row th and Production of G lehn ia L ittoralis HOU Yushua g, WANG Yuefu, REN La tia , WANG M i glu , MA Do ghu i ( Co llege of P la tT ech ology, QAU, Q i gdao 266109, Chi a) Abs tract: I vestigatio o the effects of itroge app licatio amou t o the grow th a d productio of gleh ia littora lisu der field co ditio show ed that alo g w ith the cha ge of i creasi g itroge amou t, the p la t height, leaf are a i dex ( LA I) a d the abovegrou d dry w eight i creased. So i creased itroge amou t cou ld i crease the grow th of the tops of gleh ia littoralis. I the early grow th period, root le gth a d dry w eight i creasedw ith i creasi g itro ge amou t, o the other ha d, i the late period, below 210kg itroge per hectare, root le gth a d dry w eight 2 i creased w ith i creasi g itroge amou t; how ever, the excessive itroge supply ( 315kg /hm ) decreased root le gth a d dry w eight. The resu lt i dicated that the excessive itroge supp ly hampered root elo gatio a d dry w eight accumulatio but yet the su itable itroge supply e ha ced them. The suitable itroge supply ca i crea