【摘要】 对桂中丘陵区不同龄组马尾松人工林的生物量及生产力进行了研究．结果表明：幼龄林（８ａ生）生物量为３２．０ｔ／ｈｍ２，中龄林（１４ａ生〕为１０８．０ｔ／ｈｍ２、近熟林（２３ａ生）为１８６．６ｔ／ｈｍ２，成熟林（３８ａ生）为１９７．４ｔ／ｈｍ２；林分平均净生产量分别为４．００ｔ／ｈｍ２·ａ．７．７１ｔ／ｈｍ２·ａ、８．１２ｔ／ｈｍ２·ａ和５．８０ｔ／ｈｍ２·ａ．更多还原

【Abstract】 The biomass and productivity of different age-group Pinus massoniana plantation in the hilly region of Central Guangxi have been studied.The results show that the biomass of young growth( 8- year) is 32.0t/ hm2 ,that of middle-aged stand( 14- year) is 108.0 t/hm2 ,that of near- mature forest( 23- year) is 186. 6 t/hm2 and that of mature forest( 38- year)is 197.4 t/hn2 ; and that the average stand net productivity of the four age groups are respectively 4. 0 t/hm2 · a,7. 7 t/hm2·a,8.1t/hm2·a and 5. 8 t/hm2 · a.更多还原