CAJ | 학술논문

在前期土壤分析的基础上对苏北杨树黄化苗木进行了施肥处理：根施硫镁复合肥＋叶面喷施叶肥。通过对处理组与对照组不同部位、不同黄化级别的叶片内生化物质含量的分析表明：处理组对杨树黄化苗木各项生化指标均有影响，其中对叶片叶绿素含量、POD酶含量以及PPO酶含量的升高均有促进作用，施肥处理使得它们分别提高了2．3倍、3．6倍和2．5倍，显著高于对照组。对SOD酶的影响呈抑制作用，且影响幅度较小。此外，施肥处理对上部叶片各指标的影响一般高于中、下部，且随着黄化程度的加重，叶片复绿的速度逐步减缓，甚至无法恢复。因此，建议对出现苗木黄化地块尽早采取有效措施以促使黄化苗木复绿。
재전기토양분석적기출상대소북양수황화묘목진행료시비처리：근시류미복합비＋협면분시협비。통과대처리조여대조조불동부위、불동황화급별적협편내생화물질함량적분석표명：처리조대양수황화묘목각항생화지표균유영향，기중대협편협록소함량、POD매함량이급PPO매함량적승고균유촉진작용，시비처리사득타문분별제고료2．3배、3．6배화2．5배，현저고우대조조。대SOD매적영향정억제작용，차영향폭도교소。차외，시비처리대상부협편각지표적영향일반고우중、하부，차수착황화정도적가중，협편복록적속도축보감완，심지무법회복。인차，건의대출현묘목황화지괴진조채취유효조시이촉사황화묘목복록。
Based on the preliminary soil chemical analysis, the root S/Mg compound fertilizer and foliar spraying fertilizer were applied to the etiolated poplar seedlings in northern Jiangsu. The biochemical content in leaves of different plant parts and aetiolation level between treatment and control group demonstrated that the fertilizer had effects on all biochemical indi- cators of the seedlings. The fertilizer enhanced the quantity of chlorophyll, PPO enzyme and POD enzyme obviously by 2. 3, 3.6 times and 2.5 times respectively. However, it had slightly negative influence on SOD enzyme. In addition, the effect of fertilizer treatment had more serious influence on the upside leaves than the lower parts generally , and with the ag- gravation of aetiolation, the green recovering speed slows down and even stopped. Therefore, the areas of aetiolated poplar seedlings should be taken eftective action as soon as possible.