root diameter
2.Studies have been made shown that under water stress, not only root weight, root specific surface area, root-shoot ratio, root growing potential, root water potential, root vessel diameter, etc which express the indexes of wheat root morphology and architecture have significantly changed, but also bleeding sap, root respiratory rate, root plasma membrane permeability, plasmalemma peroxide level, root protective enzymes and its isoenzymes etc which express root physiological indexes have changed correspondingly.
4.extended photoperiod could promote the growth and biomass allocation of the Abies concolor seedlings, especially a treatment for 22 hrs got the best results: average height 10.86 cm, average root collar diameter 0.32 cm, average number of lateral buds and lateral shoots 8 and 7 respectively, total dry weight, shoot and root dry weight and hair roots were all greater than that of CK seedlings.
8.The research result demonstrates that along with the increment of Reynolds number, the root mean square value of outer fluctuating magnitude of the external diameter in fall frequency band increases, the root mean square value of fluctuating magnitude of the external diameter in high frequency band decreses, demonstrating that the fluctuation of flexible pipe wall changes fluctuation don field of original rigid pipe, large-size eddy motion increases and small-size eddy motion decreases, this reduces energy loss and increases friction reduction effectiveness.
