摘要
应用盆栽试验 ,通过调节不同光照强度并控制其它条件相互一致的条件下 ,研究了光照条件对土壤 植物系统N素状况以及作物 (莴笋 )产量的影响 .结果表明 ,光照强度的改变会引起作物生长状况的相应变化 ,同时也导致土壤N素 (NH+4 N、NO-3 N)状况、作物吸收N量以及作物对N素吸收速度等的改变 .在试验所处的光照强度范围内 ,光照较强时 ,则作物吸收N素的速度较快、吸收N量增加 ,且产量高 ,但土壤中相应的N素含量(NH+4 N、NO-3 N)则只能维持在相对较低的水平 ;光照较弱时 ,则出现与此相反的情况 .
In a pot experiment, the effect of illumination intensity on soil nitrogen status and lettuce yield was studied. The results indicated that the change of illumination intensity can affect the growth of plant, the status of soil nitrogen (NH + 4 N,NO - 3 N), and the N uptake by plants. Within the range of tested intensity, the N uptake and plant yield were increased with increasing illumination intensity, but the content of soil nitrogen (NH + 4 N,NO - 3 N) was maintained at a relatively low level.
出处
《应用生态学报》
CAS
CSCD
1998年第2期139-144,共6页
Chinese Journal of Applied Ecology
基金
四川省科委"八五"重大科技攻关项目
关键词
土壤-植物系统
氮素
光照
Illumination intensity, Soil nitrogen, Nitrogen uptake.
