摘要
为明确氮素营养对玉米光合作用影响的可能机制,在河北农业大学标本园进行了田间试验。试验设4个施氮水平,分别为0,112.5,225和337.5 kg/hm2。对穗位叶光合作用参数的系统测定表明,在试验设计的施氮量范围内,氮肥提高了穗位叶叶片的Pn、叶绿素含量和可溶性蛋白质含量、延迟了叶绿素和可溶性蛋白质的分解。各测定时期,施用氮肥的处理,其叶片的Hill反应活力、PEPCase活性均高于对照,并且施氮肥越多,各项光合参数值的增加幅度越大,表观光合速率对氮肥的反应与各项光合生理生化指标的反应基本一致。说明氮肥通过调节光合电子传递能力和光合羧化酶的活性而影响表观光合速率的高低。
The study was carried out in order to explore the responses of photosynthetic performances of summer maize to nitrogen nutrition. Four treatments were designed as 0, 112.5,225 and 337.5 kg/ha respectively. The results showed that Pn, chlorophyll content and soluble protein increased with the addition of nitrogen fertilization, but the degradation of chlorophyll and soluble protein delayed. Hill reaction activity and PEPCase activity of nitrogen treatments were higher than that of CK for all periods, and the more the fertilizer input, the larger extent the photosynthetic parameters increased. The influence of fertilizer on Pn was similar to those on Hill reaction activity and PEPCase activity on the whole, which suggested that fertilizer regulated Pn by affecting electron transport capability and the photosynthetic carboxylase activity.
出处
《华北农学报》
CSCD
北大核心
2007年第1期26-29,共4页
Acta Agriculturae Boreali-Sinica
基金
河北省博士基金资助项目(00547001D-1)
国家"粮食丰产科技工程"项目河北省课题(2004BA520A072006BAD02A)
河北农业大学9816重点科技计划资助项目
关键词
玉米
氮肥
光合作用
光合生理生化指标
Maize
Nitrogen fertilizer
Photosynthesis
Photosynthetic physiological and biochemical characteristics
