Comparative study of the performance of polybag plants vis-a-vis bidded stumps in small holdings of Kannur district
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Date
1992
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Department of Plantation Crops and Spices, College of Horticulture, Vellanikkara
Abstract
In order to compare the field performance of polybag plants with that of budded stump planting a case study was undertaken in Kannur district . The data required for the study was drawn from the subsidy flies of Rubber Board Regional office , Thalassery. Eighty cases each under the two types of planting were considered. The important observations emenated from the study are
1. Polybag plantings resulted in relatively low rate of casuality.
2. Budded stump planting after establishment showed a very high growth rate in the initial years of immaturity.
3. In the later years of immaturity polybag plants and budded stumps had comparable growth rate .
4. The mean girth difference between polybag and budded stump planting narrowed down as years progressed . After 7 years, growth of plants under both the systems were comparable.
5. Proportion of plants that attained tappable girth in 7 years were substantially high in bolybag plantings.
Considering the main objective of shortening the immaturity period, by bringing more percentage of trees to tapping, use of polybag plants is justified.
Polybag planting being more expensive, it could be suggested in the areas where dry spell is extensive. In areas where dry spell is extensive. In areas where distributed rainfall is prevelent, budded stump planting may be undertaken in early june and polybag plants may be used for filling up of vacancies if any during September/ October season itself. For this purpose small polybag are sufficient and polybagging of stumps is to be done simultaneously with field planting in early june. If this system is adopted cost of planting material can be considerably reduced and at the some time better establishment and uniformity could be attained during the 1st year of planting itself .
As the financial aspects of different planting materials and the monitory gains are not considered in this study ; it may be further investigated
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