518 L. ZUFA 



Rooting levels of cuttings and needle fascicles were not significantly 

 different when propagule collection date was disregarded (Table 5). 

 Needle fascicles taken from 15-year-old P. griffithii x strobus trees 

 apparently rooted better than cuttings taken from the same trees, but 

 the difference for 5-year-old ortets was not as great (Table 2). 



Table 5. Rooting of P. strobus and P. griffithii x strobus 

 cuttings and needle fascicles obtained from 5- and 15-year-old 

 ortets: December, January, and March collections 



Propagule type No. rooted % rooted 



Cuttings 21 23.3 



Needle fascicles 28 31.1 



X 2 = 1.12 d.f. = 1 



Rooting of cuttings planted in tubes and in rooting beds were not 

 significantly different. But, the cuttings survived better in tubes than 

 in rooting beds (Table 6) . 



Table 6. Rooting and survival of P. strobus and P. griffithii 

 x strobus cuttings planted in tubes and beds 



Planting 



Ortet 



age 



Collection 

 time 



Rooted 



Survived 



location 



No. % 



No. % 



Tubes 5 and 15 Dec, Jan., 21 17.5 74 61.7 

 $ Mar. 



Beds 2, 5, 10 S 15 



years $ mature May 88 13.5 143 22.0 



X 2 = 0.52 X 2 = 18. 83^ 



d.f. = 1 d ' f - " l 



** Significant at the .1% level 



The tubed cuttings developed a well balanced root system consisting 

 of several vertically oriented roots (Fig. 1), while the cuttings in 

 rooting beds developed an unbalanced root system consisting mainly of 

 one long horizontal side root (Fig. 2) . 



