Informatics Publishing Limited

C. N. Krishnankutty , T. M. Manoharan , Mammen Chundamannil

Abstract

Bamboo (Bambusa bambos) from the forests of Kerala is allotted to the pulp industry by the government and its selling price is notified annually per metric tonne of standing bamboo. Weight of harvested bamboo is recorded at the factory gate after several days of felling. Due to loss of moisture from harvested bamboo, delay in weighing reduces its weight from that in the standing condition. The existing formula for accounting the change in weight is arbitrary and unscientific. This paper presents a set of better conversion factors which can be used to determine either the standing weight from the weight of harvested bamboo or the price payable for harvested bamboo from the notified price, after any period since harvest. Use of these conversion factors eliminates loss to either the government or pulp industry. For calculating the price payable for harvested bamboo, the notified price has to be multiplied by the conversion factor corresponding to its moisture content. For practical purposes, where the weight of harvested bamboo has already been converted to its weight at the standardised 50% moisture content, only the conversion factor of 0.9129 needs to be remembered to arrive at the price payable in any year. It is suggested that the selling price may henceforth be notified per metric tonne of bamboo at 50% moisture content, to avoid the need for any conversion factor.

Keywords

Bambusa bambos, Notified Price, Moisture Content, Conversion Factors

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C. N. Krishnankutty , Mammen Chundamannil

Abstract

Commercially important bamboo, Bambusa bambos (L.) Voss is the abundantly occurring in the forests of Kerala State in India. The average growing stock of B. bambos per ha in different stand density classes in the forests of Kerala was estimated through a statistically designed field survey in natural forests. The average number of culms per hectare ranges from 2741 in pure bamboo patches to 742 in poorly stocked bamboo areas. The estimated average green weight per ha is 147.8 metric tonnes in pure bamboo patches, 83.8 metric tonnes in medium density bamboo stands and 29.4 metric tonnes in areas with poor stocking. In terms of moisture free dry-matter content, the average oven-dry weight per hectare is 80.9 metric tonnes in pure bamboo patches, 45.9 metric tonnes in medium density bamboo stands and 16.1 metric tonnes in areas with poor stocking. The above estimates are useful for assessing the growing stock of bamboo in terms of either green weight or dry weight, when the area under bamboo in the forests in a region is known from field or aerial surveys.

Keywords

Bambusa bambos, Growing Stock per Hectare, Green Weight, Oven-dry Weight

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