Abstract:

The objectives of our article were to discuss the effects on water status and growth after Ginkgo had been transplanted and cultivated in the container and in the plantinghole for two years by measuring the growth of new root, shoot and leaf, microstructure of tracheid and pit, sapflow velocity, embolism vulnerability curve, stomatal conductance, transpiration rate and water potential. The results indicated the container planting Ginkgo had more rootlet than that the holeplantingGinkgo did while, by contrast, the holeplantingGinkgo had more thick root. The root length density of fine root and rootlet with container planting was about 6.12 times more than the hole planting. The length of shoot, the diameter of shoot and the area of leaf of containerplantingGinkgo were respectively 51.2%, 34.6%, and 33.0% more than the holeplantingGinkgo, and the difference of them was significant. The results also indicated the tracheid of containerplantingGinkgo was wider and shorter than that of holeplantingGinkgo. The pit of containerplantingGinkgo was an approximate round while that of holeplantingGinkgo was ellipse. As compared with holeplantingGinkgo, during the daytime the containerplantingGinkgo had significantly higher the sapflow velocity, the stomatal conductance, the transpiration rate and the water potential, and lower embolism vulnerability. Moreover, the root system would keep intact if being transplanted again. So, the container planting was a better planting mode of big standards mature tree cultivation.

Key words: Ginkgo biloba, container planting, hole planting, growth, branch and leaf water status