Effects of Nitrogen Fertilizer on Photosynthesis and Its Physiological and Biochemical Characteristics in Ear-leaf of Maize

doi:10.3321/j.issn:1000-7091.2007.01.007

Abstract

Abstract: 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 P(n), 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 P(n) was similar to those on Hill reaction activity and PEPCase activity on the whole, which suggested that fertilizer regulated P(n) by affecting electron transport capability and the photosynthetic carboxylase activity.

Key words: Maize, Nitrogen fertilizer, Photosynthesis, Photosynthetic physiological and biochemical characteristics

CLC Number:

S513.01

DUAN Wei-wei, LI Hui-ling, XIAO Kai, LI Yan-ming. Effects of Nitrogen Fertilizer on Photosynthesis and Its Physiological and Biochemical Characteristics in Ear-leaf of Maize[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(1): 26-29. doi: 10.3321/j.issn:1000-7091.2007.01.007.

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