陳兆先　 何友軍　 柏方敏　 張際紅　 李志輝　

摘　要：對湘東丘陵地區(qū)16年生密度為2250、2860和3225株^.hm^-2的馬尾松Pinusmassoniana飛播林分生物量及生產(chǎn)力進(jìn)行了測定分析.結(jié)果表明：單株生物量隨密度的增加而明顯減小，密度為2250株^.hm^-2的林分的單株生物量是密度為3225株^.hm^-2的林分的單株生物量的2.15倍；林分生物量同樣隨密度的增加而減小，密度為2250株^.hm^-2的林分的林分生物量比密度為3225株^.hm^-2的林分高出26.57t^.hm^-2；林分各組分的生物量隨密度的增大而減小，并出現(xiàn)W干＞W(wǎng)根＞W(wǎng)枝＞W(wǎng)皮＞W(wǎng)葉的規(guī)律；密度為2250株^.hm^-2的林分的年均凈生長量是密度為3225株^.hm^-2林分的1.50倍；林分結(jié)構(gòu)以密度為3225株^.hm^-2的林分合理.
關(guān)鍵詞：馬尾松飛播林； 生物量； 生產(chǎn)力； 林分密度
分類號：S718.55⁺6; S791.248.06　文獻(xiàn)標(biāo)識碼：A
文章編號：1000-2502(2001)01-0044-04

Effects of Stand Density on the Biomass and Productivity of Pinus masso niana Air-sowing Stands

CHEN Zhao-xian（Forestry Bureau of Hunan Province, Changsha 410007, Hunan, China）　
HE You-jun（Forestry Bureau of Hunan Province, Changsha 410007, Hunan, China）　
BAI Fang-min（Forestry Bureau of Hunan Province, Changsha 410007, Hunan, China）　
ZHANG Ji-hong（Fore stry Bureau of Liling City, Liling 423400, Hunan, China）　
LI Zhi-hui（Central South Forestry University, Zhuzhou 412006, Hunan, China）　

Abstract：The biomass and productivity of 16-year Pinus massoniana air-sowing s tands with the densities of 2250, 2860, and 3225 trees^.hm^-2 were investig ated in the hilly country of East Hunan. The results show that the biomass of single tre e decreases distinctly with the increase of the density，and the single tree bio mass of the stand of 2250 trees^.hm^-2 is 2.15 times as that of the stand of 3225 trees^.hm^-2. Likewise, the biomass of the stand decreases with the i ncrease of the density and the biomass of the stands with low densities is 26.57 t^.hm^-2 higher than that wi th high densities. The biomass of eath component of stand decreases with the in crease of the stand density, and a pattern appears which can be exhibited as W stem> W root > W branch> W bark > W leaf. The annual net biomass of the stand of 2250 trees^.hm^-2 is 1.50 times as that of the stand of 3225 trees^.hm^-2. A reasonable stan d struc ture was observed in the stand of 2250 trees^.hm^-2.
Keywords：Pinus massoniana air-sowing stands; bio mass; productivity; stand density

出版日期：2001年3月1日