不同施肥水平对南瓜过氧化物酶活性影响  

Effects of Different Fertilizer Application Levels on POD Activity of Pumpkin

作　　者：周修任[1] 杨鹏鸣[2] 

机构地区：[1]河南科技学院生命科技学院,河南新乡453003 [2]河南科技学院园林学院,河南新乡453003

出　　处：《科技导报》2009年第17期92-95,共4页Science & Technology Review

基　　金：河南省科技攻关项目(0324070100)

摘　　要：采用L9(34)正交设计,对不同施肥条件下南瓜的过氧化物酶(POD)活性和根冠比进行研究。结果表明,氮素对南瓜穴盘苗影响显著,施用氮肥后,幼苗POD活性显著增高,根冠比显著降低。与对照相比,在南瓜苗龄20、30和40d时,POD活性随施用氮肥次数和苗龄的增加而差异愈加显著。但在各个南瓜苗龄期,施用5和10g/L浓度氮肥水平的南瓜幼苗之间,其POD活性和根冠比并无显著差异。在多数情况下,磷钾肥施用后,POD活性、根冠比与对照相比差异不显著。在磷钾肥200mg/L浓度水平下,南瓜苗龄30、40和50d时的POD活性增强。微肥对南瓜穴盘苗的POD活性影响最小,微肥施用后,南瓜幼苗POD活性变化不显著,但根冠比显著增加。POD activity and shoot ratio of pumpkin plug seedling under different fertilizer application levels were systematically studied by L9（3^4） orthogonal experimental design. The results show that the effect of nitrogen application levels on pumpkin plug seedling＇s POD activity and shoot ratio is significant. The POD activity is significantly increased and the shoot ratio is significantly reduced after application of nitrogen fertilizer. As compared with the control group, for pumpkin plug seedlings in 20, 30, 40 d, the increase of POD activity with the application of nitrogen fertilizer and the increase of pumpkin plug seedling age are more significant. However, in view of various pumpkin seedlings, with nitrogen application levels between 5 and 10 g/L, the POD activity and the shoot ratio of pumpkin plug seedling see no significant difference. In most cases, the POD activity and the shoot ratio see no significant difference for application of CK of phosphorus and potassium. However, with phosphorus and potassium application in 200 mg/L and for pumpkin plug seedling in 30, 40 and 50 days, the POD of pumpkin plug seedling activity are enhanced. Microelement fertilizer has no significant effect on POD activity, but the shoot ratio sees a significant increase.

关 键 词：南瓜 施肥 过氧化物酶 根冠比 

分 类 号：S642.1[农业科学—蔬菜学]