The arbuscular mycorrhiza fungsi for rehabilitation of matured cocoa trees: growth and physiologycal responses
1998
Rini, M.V. | Azizah Hashim | Jamal Talib
The effect of mixed arbuscular mycorrhiza (AM) inoculum Glomus mosseae and Scutellospora calospora on gowth and physiology of cocoa was evaluated in the field. A split-plot design experiment was used with AM treatment as the main plot and cocoa clones as the subplot. Five selected cocoa clones (viz., KKM3, KKM4, KKM5, PBC 137 and PBC 178) were grafted onto nine-year-old cocoa (hybrid U1T1 X Na32) tress. The data were collected at 3, 5 and 7 months after the AM inoculation. Inoculated clones showed better and significant plant with longer scion lengths and larger area index compared to uninoculated ones. The crop physiology was also significantly affected by AM with higher relative water and chlorophyll content in the leaf and lower stomatal resistance. Amongst the clones, PBC 137 in particular proves to be far superior to the KKM clones. The most interesting observation as a result of AM inoculation was inoculated PBC clones started to flower 8 1/12 months after grafting, while the KKM clones flowered 12 months after grafting.
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