. bao hu sheng wu xue. botany. å ¬è·¯ å é¨çå¢= 4= hm2 å¾ç±çå¢ç ´ç¢ååè¾¹ç¼æåºå¯¼è´çå¢é¢ç§¯åå°çä¾å-ãï¼A )è¿æ¯æ²¡æé-å°ç ´ç¢åçãé¢ç§¯ä¸º1 km2 ä¿æ¤åºãå设边ç¼æåºï¼é´å½±åºï¼çºµæ·±ä¿æ¤åº100 mï¼å°è¿64hm2çé¢ç§¯å¯ç¨ä½ç-å·¢é¸ç±»çå é¨çå¢ã (B)ä¿æ¤åºè¢«ä¸æ¡å ¬è·¯åä¸æ¡é路对ååï¼å°½ç®¡å®ä»¬æ²¡æå æ®å¤å°å®é é¢ç§¯ï¼ä½å»¶ä»²åºæ¥çè¾¹ç¼æåºå ä¹ä½¿ä¸åçé¸å·¢çå¢é-å°ç ´å ç¢äºæ£®æé¸ç±»å »è²å代ï¼é£ä¹åªæå¨ä¿æ¤åºå é¨æ»å ±64 hm2çé¢ç§¯å¯ä¾é¸ç±»åºè²å代ï¼ä¸ éåå »è²çè¾¹ç¼çå¢å äº 36hm2ã 设æ³ä¿æ¤åºè¢«ååå10 m宽çå ¬è·¯åä¸è¥¿å10 m宽çéè·¯åç-å为4份ï¼éè·¯å ç¨ äºæ»å ±19 900 m2 (约2hm2)çå°çãç±äºä¿æ¤åºä» æ2%é¢ç§¯çåå°
. bao hu sheng wu xue. botany. å ¬è·¯ å é¨çå¢= 4= hm2 å¾ç±çå¢ç ´ç¢ååè¾¹ç¼æåºå¯¼è´çå¢é¢ç§¯åå°çä¾å-ãï¼A )è¿æ¯æ²¡æé-å°ç ´ç¢åçãé¢ç§¯ä¸º1 km2 ä¿æ¤åºãå设边ç¼æåºï¼é´å½±åºï¼çºµæ·±ä¿æ¤åº100 mï¼å°è¿64hm2çé¢ç§¯å¯ç¨ä½ç-å·¢é¸ç±»çå é¨çå¢ã (B)ä¿æ¤åºè¢«ä¸æ¡å ¬è·¯åä¸æ¡é路对ååï¼å°½ç®¡å®ä»¬æ²¡æå æ®å¤å°å®é é¢ç§¯ï¼ä½å»¶ä»²åºæ¥çè¾¹ç¼æåºå ä¹ä½¿ä¸åçé¸å·¢çå¢é-å°ç ´å ç¢äºæ£®æé¸ç±»å »è²å代ï¼é£ä¹åªæå¨ä¿æ¤åºå é¨æ»å ±64 hm2çé¢ç§¯å¯ä¾é¸ç±»åºè²å代ï¼ä¸ éåå »è²çè¾¹ç¼çå¢å äº 36hm2ã 设æ³ä¿æ¤åºè¢«ååå10 m宽çå ¬è·¯åä¸è¥¿å10 m宽çéè·¯åç-å为4份ï¼éè·¯å ç¨ äºæ»å ±19 900 m2 (约2hm2)çå°çãç±äºä¿æ¤åºä» æ2%é¢ç§¯çåå°è¢«å ¬è·¯åéè·¯å ç¨ï¼ æ¿åºè§åè äºè¾©è¯´è¿å¯¹ä¿æ¤åºçå½±åæ¯å¾®ä¸è¶³éçãç¶èï¼ä¿æ¤åºå·²ç»è¢«åå²æ4个çæ®µï¼ æ¯ä¸ªé¢ç§¯ä¸º495 m x 495 mãæ¯ä¸ªçå¢ç段ä¸-å¿å°è¾¹é¿æè¿ä¸ç¹çè·ç¦»ç¼©ç-为247 m,ä¸å° å åè·ç¦»çä¸åãç°å¨ï¼å®¶ç«åé¼ ç±»è½å¤æ²¿çå ¬è·¯ãéè·¯æè¾¹ç¼è¿å ¥æ£®æï¼æå³çé¸ç±»åª è½å¨è¿4个ç段çæä¸-å¿åºåæåå°å »è²å¹¼éãæ¯ä¸ªä¸-å¿åºä¸º hm2ï¼æ»è®¡ hm2ãè¿æ ·ï¼ å³ä½¿å ¬è·¯åéè·¯ä» ä» å ç¨2%çåå°ï¼ä½æ¯ç±äºè¾¹ç¼æåºçå¢å¤§ï¼ä½¿å¾éå®é¸ç±»çå-çç å¢éä½äºå¤§çº¦ä¸åçé¢ç§¯ãè¿ä¸ç¹å¨å°ç森æçå¢ä¸-ï¼ä¸å¤§ç森æç¸æ¯ï¼é¸ç±»çå-åç¹æ® è½åä¸
Size: 1581px × 1581px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcollectionbiodiversity, bookcontributorli, booksubjectbotany
