CAJ | 학술논문

为了确定闽楠苗木的适宜施磷量，测定了8个水平施磷（0、7．5、15、22．5、30、40、60、90 mg/株）处理下闽楠苗木的生长特性和叶片养分状况。结果表明：（1）随着磷素供应水平的升高，闽楠苗高和总生物量均呈先升高后稳定的趋势，而地径呈增长-稳定-降低的趋势，拐点磷素供应量为22．5 mg/株；（2）随着磷素供应量的增加，闽楠苗木叶片氮和磷含量呈升高趋势，而钾含量先升高后降低；当供磷量大于22．5 mg/株时，生物量未发生显著变化，说明此时植株对氮磷钾为奢侈消耗；（3）闽楠苗木叶片氮磷钾的临界含量分别为16．04、1．36和21．93 g/kg，最适含量范围分别为16．04～27．45、1．36～3．01和21．93～36．40 g/kg。综合分析认为，对闽楠苗木的最适施磷量为22．5～30?0 mg/株。
위료학정민남묘목적괄의시린량，측정료8개수평시린（0、7．5、15、22．5、30、40、60、90 mg/주）처리하민남묘목적생장특성화협편양분상황。결과표명：（1）수착린소공응수평적승고，민남묘고화총생물량균정선승고후은정적추세，이지경정증장-은정-강저적추세，괴점린소공응량위22．5 mg/주；（2）수착린소공응량적증가，민남묘목협편담화린함량정승고추세，이갑함량선승고후강저；당공린량대우22．5 mg/주시，생물량미발생현저변화，설명차시식주대담린갑위사치소모；（3）민남묘목협편담린갑적림계함량분별위16．04、1．36화21．93 g/kg，최괄함량범위분별위16．04～27．45、1．36～3．01화21．93～36．40 g/kg。종합분석인위，대민남묘목적최괄시린량위22．5～30?0 mg/주。
To determine the optimal phosphorus need of Phoebe bournei seedlings, a pot trial was conducted with fertili-zation at levels of 0,7.5,15,22.5,30,40,60,90 mg per seedling. And the growth characteristics and foliar nutrient status of Ph. bournei seedlings were measured. The results indicated that:( 1) Height and total biomass of Ph. bournei seedlings displayed growth-stability, with the increase of phosphorus supply,the ground diameter firstly went up, then was stable, finally decreased.(2) The leaf N and P concentrations grew up, but K display accelerated then went down as the phos-phorus addition increased. The total dry biomass did not significantly change when phosphorus was above 22. 5 mg per plant. So it suggested that the N, P and K were luxury consumed. (3) The critical values of N, P and K in leaf of Phoe-be bournei seedlings were 16. 04, 1. 36 and 21. 93 g/kg, respectively, while their optimum concentration range were 16.04-27?45,1.36-3.01 and 21.93-36.40 g/kg,respectively. Therefore,the optimal phosphorus amount for Ph. bournei seedlings might be 22.5-30?0 mg per seedling.