Nutrition studies with irrigated Eucalyptus camaldulensis and Anthocaphalus chinensis on a cracking clay in northern Australia
1986
Cameron, D.M. | Rance, S.J. (CSIRO, St. Lucia, Queensland (Australia). Division of Forest Research. Cunningham Laboratory) | Williams, E.R.
The effects of N, P, S, Zn + Fe, and a mixture of other plant nutrients were tested in a factorial experiment with irrigated Eucalyptus camaldulensis (Myrtaceae) and Anthocephalus chinensis (Rubiaceae) on an alkaline cracking clay. N gave a highly significant response in height and diameter growth of E. camaldulensis, and there was an additional benefit from the application of P. Survival was excellent but borers attacked 4 % of trees and 9 % suffered stem breakage during storms. A. chinensis responded to N, but health declined after the first year possibly due to B accumulating to toxic levels. Insect attack was not a problem with this species. E. camaldulensis can be established and grown satisfactorily on a difficult site at Kununurra under irrigation and when fertilized with N and P. The health decline encountered with A. chinensis suggests that problems could arise with B and with E. camaldulensis unless the soil profile is adequately flushed. Continued irrigation without adequate flushing could accumulate salts to levels which could depress growth
显示更多 [+] 显示较少 [-]