INCREASES IN ROOT AND SHOOT GROWTH OF ROSA MULTIFLORA CUTTINGS TAKEN FROM STOCK PLANTS FERTILIZED WITH LIME AND P

Hardwood cuttings of the rootstock Rosa multiflora ‘Brooks 56’ were taken from one-year-old stock plants grown in an acid, sandy soil low in nutrients and treated with 0, 1120, or 3360 kg/ha calcitic limestone, and 0, 69, or 139 kg/ha P₂O₅ in factorial combination.
There were no differences in rooting or shoot growth of cuttings taken from the variously treated stock plants after 12 weeks in a controlled environment glasshouse.
However, when cuttings were rooted in the field for 21 weeks, those from stock plants treated with 0 or 1120 kg/ha lime plus P produced more roots than cuttings from plants treated similarly with lime but with no P. Cuttings from plants treated with 3360 kg/ha lime and 0 or 139 kg/ha P produced more roots than cuttings from plants treated similarly with lime but with 69 kg/ha P (lime x P interaction). Cuttings from plants treated with 139 kg/ha P produced more shoot dry weight than cuttings from plants treated with 0 or 69 kg/ha P (main effect). Stock plants treated with lime and P appeared to produce cuttings which could better withstand the additional stress of field planting.

I International Symposium of the Research and Cultivation of Roses

H.B. Pemberton, V.A. Haby, W.E. Roberson, J.V. Davis

https://doi.org/10.17660/ActaHortic.1986.189.14