林业科学
林業科學
임업과학
SCIENTIA SILVAE SINICAE
2001年
2期
1-12
,共12页
连香树%营养元素%含量%积累%循环
連香樹%營養元素%含量%積纍%循環
련향수%영양원소%함량%적루%순배
研究了10年生连香树人工群落8种营养元素的含量、积累分配和循环。主要结论是：(1)连香树营养器官中各种元素的平均含量顺序为Ca＞N＞Al＞K＞Mg＞P＞Fe＞Mn。(2)元素量在各营养器官的分配顺序为根＞叶＞去皮干＞皮＞枝，各元素含量顺序为Ca＞N＞K＞Al＞Mg＞P＞Fe＞Mn。(3)连香树群落8种元素的吸收量、存留量和归还量分别是729.82 kg·hm-2a-1、206.72kg·hm-2a-1和523.10kg·hm-2a-1。(4)51.2％的归还总K量靠降水淋溶归还，其余元素总归还量的55.7％～96.5％靠凋落物归还。Fe、Al归还量的41.3％和44.3％通过死根归还。(5)8种元素的利用系数、归还比和周转期分别为0.23～0.54、0.57～0.82和2.26～7.63。文中改进了降水淋溶归还的算法，提出了群落归还系数、积累系数和吸收系数，讨论了落叶树种元素生物循环的算法。
研究瞭10年生連香樹人工群落8種營養元素的含量、積纍分配和循環。主要結論是：(1)連香樹營養器官中各種元素的平均含量順序為Ca＞N＞Al＞K＞Mg＞P＞Fe＞Mn。(2)元素量在各營養器官的分配順序為根＞葉＞去皮榦＞皮＞枝，各元素含量順序為Ca＞N＞K＞Al＞Mg＞P＞Fe＞Mn。(3)連香樹群落8種元素的吸收量、存留量和歸還量分彆是729.82 kg·hm-2a-1、206.72kg·hm-2a-1和523.10kg·hm-2a-1。(4)51.2％的歸還總K量靠降水淋溶歸還，其餘元素總歸還量的55.7％～96.5％靠凋落物歸還。Fe、Al歸還量的41.3％和44.3％通過死根歸還。(5)8種元素的利用繫數、歸還比和週轉期分彆為0.23～0.54、0.57～0.82和2.26～7.63。文中改進瞭降水淋溶歸還的算法，提齣瞭群落歸還繫數、積纍繫數和吸收繫數，討論瞭落葉樹種元素生物循環的算法。
연구료10년생련향수인공군락8충영양원소적함량、적루분배화순배。주요결론시：(1)련향수영양기관중각충원소적평균함량순서위Ca＞N＞Al＞K＞Mg＞P＞Fe＞Mn。(2)원소량재각영양기관적분배순서위근＞협＞거피간＞피＞지，각원소함량순서위Ca＞N＞K＞Al＞Mg＞P＞Fe＞Mn。(3)련향수군락8충원소적흡수량、존류량화귀환량분별시729.82 kg·hm-2a-1、206.72kg·hm-2a-1화523.10kg·hm-2a-1。(4)51.2％적귀환총K량고강수림용귀환，기여원소총귀환량적55.7％～96.5％고조락물귀환。Fe、Al귀환량적41.3％화44.3％통과사근귀환。(5)8충원소적이용계수、귀환비화주전기분별위0.23～0.54、0.57～0.82화2.26～7.63。문중개진료강수림용귀환적산법，제출료군락귀환계수、적루계수화흡수계수，토론료락협수충원소생물순배적산법。
The distribution and circulation of 8 nutrient element contents and accumulation in the l0a artificial Cercidiphyllum japonicum community were studied. The results indicate:( 1 )The order of average content of elements in organs is Ca ＞ N ＞ Al ＞ K ＞ Mg ＞ P ＞ Fe ＞ Mn. (2) The order of different organs for element accumulation is roots ＞ leaves ＞ stems without barks ＞ barks ＞ branches, and the order of elements accumulation is Ca ＞ N ＞ K ＞ Al ＞ Mg ＞ P ＞ Fe ＞ Mn. (3) The amount of uptake, retention and return of 8 elements in the community is 729.82 kg· hm- 2 a-1、 206.72 kg· hm- 2 a- 1 and 523.10 kg· hm-2a-1, respectively. (4)51.2 % of total return for K is returned through rainfall leaching, 55.7 %～96.5% of the rests through litter. However,41.3% of total return for Fe and 44.3% for Al is still returned through dead roots,respectively. (5) Utilization coefficient, ratio of return to uptake, circulation period were 0.23～0.54、0.57～0.82 and 2.26 ～7.63. Meanwhile, the calculating method of nutrient elements returning through leaching was amended, and the uptake coefficient( annual element uptake/annual available element in soil), accumulation coefficient( annual element accumulation/ annual available element in soil)and return coefficient(annual element retum/annual available element in soil)were put forward. Finally, the calculating method of element circulation for deciduous forest was discussed.
