Effects of some plant growth regulators on some biometric variables in mango cv. Haden
1999
Leal, F. | Sergent, E. | Anlez, M.(UNELLEZ, Estado Portuguesa, (Venezuela). College of Agriculture. Vegetal Production Program)
Experiment was designed to evaluate the influence of paclobutrazol (PBZ) alone combined with ammonium thiosulfate (ATS) and potassium thiosulfate (PTS) on mango Haden trees. Plants were of nine years old and located at the College of Agriculture Experimental Station, situated at 10 deg 16 lipda 13 philipda N and 67 deg 36 lipda 41 philipda W and at 450 masl. The experimental design used was an incomplete randomized block with five replications, and one tree was the experimental unit. The treatments were: check (T0), PBZ only (T1) and the combinations of PBZ plus ATS or PTS, the ATS and PTS at three different concentrations and at two different application data. The biometric variables measured were: plant height (PH), canopy width from North to South (CWNS), canopy width from East to West (CWEW), lateral canopy area (LCA), stem circumference (SC), and stem cross section area (SCSA). First year results showed that there was not significant differences in the variables evaluated at P GT 0.05, this is probably due to tree size at the moment of the initiation of the experiment, that is they were in the average of PH = 4 to 5 m, CWNS = 5 to 5.4 m and CWEW = 4 to 5 m. Similar works from the literature showed that PBZ was not influenced on mango tree sizes during the first year after treatment, but the effect was seen in the following year.
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