EFFECT OF SEVEN COVERING MATERIAL SON GERMINATION SURVIVAL AND GROWTH OF Pinus caribaea VAR. caribaea, IN THE FOREST EXPERIMENTAL STATION IN VIÑALES, PINAR DEL RIO PROVINCE
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Abstract
The results obtained by using different covering materials i n the forest nurseries designed to grow seedlings of Pinus caribaea var. caribaea in black polythene bags of a standard size are given.. The experiment was mounted following a randomized block design, with seven treatments and four replications. The materials used as covers were: sieved soil (control), sand of O,02-0,2 mm, gravel of 0,2-1 ,O mm, rice husk, fresh pine sawdust, pine chopped needles and coffee husk. I t was demonstrated that with the use of coveringmaterials, a higher germination and survival percentage i s obtained, as well as an even growth of the cultivated stock. The eatments which gave the best results were: sand, gravel, rice husk, and fresh pine sawdust. From the technical economical point of view, the use of sawdust i n the nurseries growing P. caribaea var. caribaea iS recommended
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