红树植物秋茄热值及其变化的研究

THE CHANGE OF CALORIC VALUES OF A MANGROVE SPECIES, KANDELIA CANDEL IN CHINA

Kandelia candet is a mangrove species which is distributed broadly in tropical and subtropical coast areas in China.The caloric values of its various plant parts range from 17.42 to 20.14 kJ/g for gross caloric value, and 19.48 to 21.98 kJ/g for ash-free caloric value, with the highest value for flower and leaf, and the lowest for root. The caloric value of leaf varies evidently with seasons, being the highest in October (19.7kJ/g), and the lowest in April (18.7kJ/g). The caloric value also varies with latitude of the areas where the samples were collected. Genenrally, the caloric values in spring, summer and fall decrease with the latitude increase,but that in winter increase with latitude increase. The charge patterns of caloric values for leaf revealt that K. candel possessed some special biological characters and cold-resistance which make it be able to grow and to be distributed in higher latitude areas than other mangrove species.