VNIH:} '^11 '":/$00Z A^, U: s u O d ^ '^I 1'12 ^ !11 11 ;, ^, I, 1,811 111 SL^.^"=a TVa 90.0^= ."V ^^WONOa= a", ONV""= ^O aso. ^rid ^"L, ^, 0. No. a^^, v9 do^,.. " SLS=^, 0=, A^, VC"09 S 8.0 .."^11U=aV"VllU aH. ^0 "OILV^,.,. SNOW=. a"V ACnLS a". L ^IIJS :":^110.11 ":0 A :,: V;^V :^:SI":NIH;> KillLS!ill^110.1 0 Dull^:<IV:^VE) OGONVll. 0 (81) I'he^I 1010f: Cldd O. LLl EARCll RELLOWS OF THE PRE-PROJECT PRE-PROJECT LEADER, ZENG LINGHAl VICE-LEADER: HOU YUANZHAO D CTOR Or PRE. PROJECT OFFICE S WANG HONGFENG KEY STAFF : XIE Ll ^ ZHONG WE A. YANG ZHONGYANG EXECUTING AGENCY GUANGDONG ACADEMY OF FORESTRY CHINA, GUAlqGGONG, GUANGZHOU, LONGDONG, 510520 TELs 86-020-87035645 FAXs 86-020-8703/245 E-mail: zlinghai@263. net C ESE ACADEMY OF FORESTRY CHINA, BEIJING, BEHIND YIHEYUAN, 100091 TEL 86-010-62889731 FAX, 86-010-64960575 Abbreviations and Acronyms. , . , . , . , , , , . I I The Distribution, Types and Area of Secondary Forests in the Tropical Regions of China. ......,.........................................................................,....,................... 2 Ab stract ................................................................,........................................................ 2 Introduction ...............................................................,.........................................,......... 2 I . Method ..................................................................*.....,............................................. 3 2. Tropical region and tropical forests in China ............................................................ 4 2. I Tropical region ,..,..,..,.,..,..,.................................................,..,..,..,..,..,............................,..,. 4 2.2 Tropical forests of China ... ... .. .. .. .. ... .... .. .. .. .. ,. .. .. ., . .,. .,. .,. ,. ,.. ,.. ,.. ... ... .......... ... ... ... ... 7 3. The types of China' s TSF ..,....,.........................................................,........................ 9 3 . I Definition of SF ...........................,..,..,..,..,..,..........,.....---------------------------------..,'.,"""""""" ' 3.2 Come into being of China' s SF .. .. .. .. .... .. .. .. .. .. .. ., . .,. .,. .,. ,. ,.. ... .., ... ... ....... ... ... ... ... .... 10 3.3 The area of TSP and degraded forest land .. ,.. ... .. .. .. .. .. ... .. ... .. .;. .. .. .. ., . .,. .,. .,. .,. ... .., 12 3 .4 Types of the SE, ..,..,..,..,.,...,.,,.,..,..,..,....,..............................................,..,..,..,..,..,.............. I 2 4. Conclusions .......................................................................................................,..... 17 U Current Situation and Techniques in the Management of Tropical Secondary Forests in China ................................................................................................. 18 Abs tract .................................................,.....................................................................,, Introduction ...........................................................,...............,....................................*18 I. The characteristics of tropical forests of China ...................................,................ 19 2. Relative policies and regulations of Chinese Government. .......,.......................... 19 3. The current situation of TSFs in China. ..........................,.................................... 21 3 . I C}IFA ............................,..,..,..,..,..,..,.,..,.................................................,..,..........,.....,..,.., 2 I 3.2 Establishment of ER district on^) .. .. .. .. .. .. ... .. ... ....... ... ... .. .. .,. .,. .,. .,. .,. ,. ,.. ... ... .... .. 21 3.3 Conducting Natural Forest Protection Project of government ,..,..,..,..,............................. 23 3.4 Ecological Forests (EF) management . ., . ., . .,. .,. .,. .,. ,. ,. ,.. ... ... ... ... ... ... ... ... .... ... ... ... ... ... ... .. 23 4. The management techniques of TSE .................................................................... 24 5. Major achievements and experiences ................................................................... 26 5 . I Major achievements .........,............................................................,..,..,.,,..,..,..,..,.............. 26 5 . 2 Minor experiences ...............................................................,..,..,..,..,..,..,..,....,.....,............ 27 6. Conclusions ....................................................................................,..................... 28 in Analysis of Documents Concerning Research of Management of '11.0pical Secondary Forests Outside of China. ............................................................... 29 Abstract ............................................................................................,.......................... 29 Introduction ............,.................................................................................................... 29 I. Research process of management of global TSEs ..........................,..................... 30 2. Types of TSF ........................................................................................................ 31 3. The development of TSF ...................................................................................... 31 4. The composition of species and construction of forest stand in TSF .............,..... 32 5. Change of tree species during TSF succession ...........,....,.................................... 33 6, Plant species of TSF and land use intensity. .........,............................................... 34 7. Effect of artificial stands to secondary succession ,.............................................. 35 IQ AC^!;I, '03 M I oq ^. 8. TSF and armnal. ..............,............. e. ...........................,..............................,....,...... 36 9. TSF succession and environment ...................,...............,..................................... 36 10. ' Biomas s and productivity of TSF. ..........................................,....,...................... 38 I I . Nutrient cycling in TSF ..........,.....................................,..................................... 39 12. Soil of TSF .............................,...............,..............................................,............ 40 13. Conclusions and recoinmendations .................................................................... 41 IV Current Situation and Experiences in the Management of Tropical Secondary Forests Outside of China. ......."..........,........................................... 42 Abstract .....................,.......;..................................................,....,....,...............,.........,.. 42 introduction, .........,....,...............,....,..........,....................................,............................ 42 I. The tropics and forest resources in the world. ..,....................,................................. 43 I. I Tropical nations and their population. ,... .......... ....... .., ... ... ... .......... ....,. ... ...... .,. .,. .,. .,..,..,.. .. 43 1.2 Distribution of forest resources in the tropics ................................................................... 43 1.3 Status of tropical forest resources ... .......... ... .. .,. .,. .,.,,.. ..,,.. ... ... ... ... ... ... ... ... ....... ... ... ... ... ... 44 2. TSF status in the world. ..............................................,..............................,....,....,... 46 2.1 The area and distribution of TSE, . .,. .,. ...,... ... ... .. .. ... .......... .. ... .. .. ... .. ... ... ... .. .,. ... ... .,. .,. 46 2.2 Basic types of SE, ,.,..,..............,..,..,..,..,.,.............................................................,..,.....,.... 47 2.3 Main characteristics of TSF .. .......... .,. .,.,..,... ... ..,. ... .,. ...... .... ... ... ... ... ... ... ... ... .. .. .. .. .. .. .. 48 3. Study and present management status and experiences of TSF in the word ........... 49 3.1 Present nunagement status of TSF in the world ,.,..,..,..,..,.......,..,........,............................ 49 3.2 international experiences for TSF management. ...........................................,............,...... 50 4, importance of TSF management .,..;..............................................................,....,.... 55 4. I Importance of TSP ............................................,.................,..,..,..,..,..,.....,........................ 55 4.2 ProbleiusofTSF .......,..,..,..,..,..........................'..............................................,..,....,..,...,... 5 5 5, Conclusions and recoinmendations ......................................................................... 57 V Potential Productivity and Some Management Modes of China's Tropical Secondary reorests andTheir Chief Technology Design. ..,....,....,.................... 58 Abstract .........,.........................................................................,....,........................,..... 58 introduction. .......,....,...............,....,...............................,.............................................. 58 I, The potential productivity of TSF in China. .................................................*....,..... 59 I . I The present productivity status ,. .,. .,. .,. .,.. ... ... .... .,. ... ... ... ....... ... .. .. .. .. .. ... ... ... ... .. ... .,. .,. ., 59 I 2 Potential productivity .......................................................,...............................................