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Effect of Nitrogen Addition on Growth and Photosynthetic Physiological Characteristics of Medicago sativa(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年02
Page:
158-164
Research Field:
Publishing date:

Info

Title:
Effect of Nitrogen Addition on Growth and Photosynthetic Physiological Characteristics of Medicago sativa
Author(s):
LI Xue-fen
(Architecture and Urban Planning Department,Guang’an Vocational and Technical College,Guang’an,Sichuan 638000)
Keywords:
nitrogen additionMedicago sativagrowthphysiological characteristics
PACS:
-
DOI:
10.11937/bfyy.201502046
Abstract:
Taking Medicago sativa as test material,by three consecutive years of manual nitrogen addition method to study the responses of growth and photosynthetic physiological characteristics of Medicago sativa to different nitrogen addition levels CK (0 g?m-2?a-1),LN (10 g?m-2?a-1),MN (20 g?m-2?a-1),HN (30 g?m-2?a-1).The results indicated that nitrogen addition stimulated the growth and photosynthetic physiological characteristics of Medicago sativa.The yield and the index of photosynthetic physiological characteristics of Medicago sativa were significantly higher than CK(P<0.05),which showed MN>HN>LN>CK with nitrogen addition.The daily variation of Pn and EVAP were in bimodal curve,while stomatal limitation resulted in different levels of photosynthetic “lunch break” phenomenon.The daily variation of Ci was in “N” word and Gs were in inverted “V”.The Chl a,Chl b and NUE of Medicago sativa showed a consistent rule with nitrogen addition,which were significantly higher than CK (P<0.05),while the PUE of Medicago sativa had no significant difference with CK (P>0.05).Correlation analysis showed that the uniformity and interaction influence of the index of photosynthetic physiological characteristics of Medicago sativa.

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Last Update: 2015-02-25