伍恩华, 刘强, 王敏英. 海南岛北部海岸木麻黄防护林凋落物量及养分归还动态[J]. 华南师范大学学报(自然科学版), 2012, 44(2).
引用本文: 伍恩华, 刘强, 王敏英. 海南岛北部海岸木麻黄防护林凋落物量及养分归还动态[J]. 华南师范大学学报(自然科学版), 2012, 44(2).
DYNAMICS OF LITTER BIOMASS AND NUTRIENT RETURN IN CASUARINA EQUISETIFOLIA PLANTATION AS WINDBREAK ON THE COAST OF NORTH HAINAN ISLAND[J]. Journal of South China Normal University (Natural Science Edition), 2012, 44(2).
Citation: DYNAMICS OF LITTER BIOMASS AND NUTRIENT RETURN IN CASUARINA EQUISETIFOLIA PLANTATION AS WINDBREAK ON THE COAST OF NORTH HAINAN ISLAND[J]. Journal of South China Normal University (Natural Science Edition), 2012, 44(2).

海南岛北部海岸木麻黄防护林凋落物量及养分归还动态

DYNAMICS OF LITTER BIOMASS AND NUTRIENT RETURN IN CASUARINA EQUISETIFOLIA PLANTATION AS WINDBREAK ON THE COAST OF NORTH HAINAN ISLAND

  • 摘要: 在固定样地采用凋落物收集器收集并定期回收凋落物的方法,研究了海南岛北部海岸木麻黄防护林2008—2009年的凋落物产量及N、P、K养分归还动态. 结果表明:(1)木麻黄林年凋落物量为5.9844t/hm2,其中小枝凋落物量在年凋落量中占有最大比例,为88.99%;其次是杂物,为6.63%;最小是皮+枝,为4.38%. 木麻黄林总凋落物量和小枝凋落物量的月变化格局十分相似,皮+枝、杂物凋落物量月动态变化则比较平缓.(2)小枝中N、P、K 3种主要养分年归还总量为94.69kg/hm2,其中N归还量在年归还量中占有最大比例,为78.86%;其次是K,为18.71%;最小是P,为2.43%. N归还量月动态与总凋落物量月动态变化极其相似,P、K归还量月动态则比较平缓.

     

    Abstract: In order to explore the characteristics of nutrient cycle in the plantation in coastal region in Hainan Island, we studied the litter production and nutrient return of C. equisetifolia plantation on the coast of north Hainan Island through monthly collection of litter from litter traps in fixed sampling plots during 2008-2009. The results showed that the annual litter biomass of C. equisetifolia plantation was 5.9844t?hm-2. The needle litter took up the largest percentage (88.99%). The miscellaneous litter took the second place (6.63%). And the bark + branch litter took the least percentage (4.38%). The monthly dynamic of needle litter was similar to the total litter, but the monthly dynamics of bark + branch and miscellaneous litter were slow. The annual return of three main nutrients (N, P and K) from the needle litter was 94.69 kg?hm-2?a-1 in total. The percentage in the annual return of N, P and K was 78.86%, 2.43% and 18.71%, respectively, with the sequence of N>K>P. The monthly dynamic of N return was similar with the total litter, but P and K were slow.

     

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