Effect of Fertilization on the Photosynthetic Characteristics of Alfalfa(Medicago sativa) in its branching period

Abstract

Abstract: 【Objective】The photosynthetic rate, transpiration rate, stomata conductance of 3 year-old alfalfa in its branching period were studied under different fertilizing treatments.【Method】Using LI-6400 portable photosynthesis measurement system of LI-COR company.【Result】The photosynthetic rate of fertilizing nitrogen 10kg/hm2.【Conclusion】Fertilizing nitrogen 10kg/hm2 could increase the photosynthetic rate, water use efficiency (WUE) of alfalfa leaf. Based on fertilizing nitrogen 10kg/hm2, fertilizing phosphorus 20-40kg/hm2 could increase WUE with increments of fertilizing phosphorus. Fertilizing phosphorus 20 kg/hm2 could increase transpiration rates of leaves and markedly improved the stomata conductance and intercellular CO2 concentrations.

CLC Number:

Wei Xin ju, Jia Zhi kuan, Han Qing fang, Dong Zhi xin. Effect of Fertilization on the Photosynthetic Characteristics of Alfalfa(Medicago sativa) in its branching period[J]. Chinese Agricultural Science Bulletin, 2006, 22(12): 77-77.

References

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