|
 |
研究报告目录 |
赤红壤丘陵水土流失区马尾松纯林改造效益分析 |
| ------------------------------------------------------------------------------------------ |
| 出 版 社：热带地理 |
| 发表时间：1999 |
| 台 站：
鼎湖山森林生态系统定位研究站
|
| 作 者：刘世忠、敖惠修、何道泉、夏汉平、江灵瑟、戴万华. |
| 点 击 率：6531 |
| ------------------------------------------------------------------------------------------ |
| 关 键 字：马尾松；红锥；生态效益；林分改造；赤红壤丘陵区 |
| 摘 要：马尾松纯林改造是当前植物生态和林业工作的一项迫切、重要的内容。经赤红壤丘陵水土流失区近6年的马尾松、红锥混交试验研究，发现松、锥混交林在生长量、林地凋落物现存量、林地表层土壤养分含量和含水量、小气候环境，以及林下植物物种多样性等方面均比纯松林有着明显的改善或提高，不失为一种适宜南亚热带赤红壤丘陵水土流失区的优良混交形式，建议在此类地区大力推广种植。 |
| 关 键 字(英文)：Pinus massoniana; Castanopsis hystris; Eco-benefits ; Stand improvement; Hilly erosion region of lateric red soil |
| 摘 要(英文)：A 6 - year(1992～1997) trial on eco - benefits of Pinus massoniana and Castanopsis hystris mixed forest, in a hilly erosion region of lateric red soil of subtropics showed that the mean height growth, radial growth, individual volume increment and stock of the mixed forest increased by 3.85%, 18.75%, 42.11% and 18.69%, respectively, compared with a pure P. massoniana stand under in same conditions. Futhermore, the former had 3.1t/hm2 of litter standing crop, more 2.48 times than the latter. Meanwhile, the contents of soil organic matter, total N and P, available N, P and K at 0～20cm, and soil water at 0～20cm and 20～40cm deep in the mixed forest increased by 354%, 374%, 9.5%, 73.3%, 9.9%, 15.5%, 54.1% and 36.3%, respectively, as compared to the pure forest. The highest temperature of air and soil surface, the daily amplitude of temperature of air and soil surface in the mixed forest decreased by 1.6℃ , 1.4℃, 1.6℃ and 2.2℃, whereas the relative humidity increased by 8.6%; and the plant spieces and individuals were more abundant and complicated than in the pure forest. The results indicate that the P. massoniana and C. hystris mixed forest is a suitable mixed forest type in this region lied in the low subtropics, and is suitable for improving the local P. massoniana pure forest. |
| ------------------------------------------------------------------------------------------ |
| null |
|
|
|
