分根区交替渗灌对银杏苗木生长及生理的影响

doi:10.11707/j.1001-7488.20130608

Abstract

Abstract:

This study was conducted to evaluate the adaptability of the alternative partial root-zone irrigation (APRI) on Ginkgo biloba. Potted 3-year-old G. biloba with divided root zones were used to investigate effects of irrigation regimes on growth, photosynthesis and water use efficiency (WUE). Results showed that APRI inhibited the aboveground redundancy vegetative growth, stimulated the absorption root growth and improved the root and shoot ratio. Dry weight of the absorption roots with APRI increased by 6.7% and 37% and the root shoot ratio with APRI increased by 50.1% and 10.7%, respectively, compared with the fixed partial root-zone subirrigation (PS) and the full root-zone subirrigation (FS). APRI decreased the stomatal conductance and transpiration without obvious change in leaf water status and photosynthetic rate, therefore the irrigation WUE and leaf instantaneous WUE improved by 51.7%, 33.3% and 4%, 20.5% respectively as compared to PS and FS treatments. In conclusion, APRI had significant influence on physiology and growth of G. biloba seedlings and was an effective method of water saving and growth regulating.

Key words: Ginkgo biloba, alternative partial root-zone irrigation, growth features, photosynthetic rate, water use efficiency

CLC Number:

S723.6

Wang Lei, Cao Fuliang, Wu Jiasheng. Effects of Alternative Partial Root-Zone Irrigation on Growth and Physiology of Ginkgo biloba Seedlings[J]. Scientia Silvae Sinicae, 2013, 49(6): 52-59.

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Effects of Alternative Partial Root-Zone Irrigation on Growth and Physiology of Ginkgo biloba Seedlings

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