Journal of Tropical Oceanography ›› 2022, Vol. 41 ›› Issue (6): 67-74.doi: 10.11978/2021158CSTR: 32234.14.2021158

• Special Column: Mangrove Forest • Previous Articles     Next Articles

The mangrove forest distribution and analysis of afforestation effect in Zhejiang Province

WU Weizhi1,2(), ZHAO Zhixia3, YANG Sheng3, LIANG Licheng2, Chen Qiuxia3(), LU Xiang3, LIU Xing3, ZHANG Xiaowei1,2   

  1. 1. Zhejiang Forest Resources Monitoring Center, Hangzhou 310020, China
    2. Zhejiang Forestry Survey planning and Design Co., Ltd., Hangzhou 310020, China
    3. Zhejiang Institute of Subtropical Crops, Wenzhou 325005, China
  • Received:2021-11-14 Revised:2022-01-21 Online:2022-11-10 Published:2022-03-22
  • Contact: Chen Qiuxia E-mail:907941740@qq.com;yzscqx@163.com
  • Supported by:
    Zhejiang Province "14th five-year" Breeding Special Project Selection and Breeding of New Species of Coastal Protective Forest Trees(2021C02070-6);Investigation on Mangrove Biological Resources in Zhejiang and Fujian(2017FY100701)

Abstract:

Based on the mangrove plantation data and stand growth monitoring at different periods, we analyzed the spatial and temporal variation of mangrove forests and regional silvicultural growth differences in Zhejiang Province. The results show that: (1) The total area of mangrove forests in Zhejiang Province by 2020 is 386.77 hm2, including 257.01 hm2 in Wenzhou and 129.76 hm2 in Taizhou; the main afforestation species are Kandelia obovata (368.48 hm2) and Myoporum bontioides (18.29 hm2); (2) The proportion of mangrove area at different periods was 0.11% (before 2000), 3.72% (2000-2010), 36.17% (2011-2015) and 59.99% (2016-2020), respectively; (3) The average heights of Kandelia obovata before 2000 and 2000-2010 were 205.5 cm and 246.13 cm, respectively; the cover was as high as 67.69% and 77.9%. And the average heights of Kandelia obovata in 2011-2015 and 2016-2020 was 106.63 cm and 50.17 cm, respectively; the cover was 68.66% and 24.56%; (4) There were significant differences in the alkali-hydrolyzed nitrogen, available potassium, organic matter and salt content in tidal flat sediments of mangrove plantations in different regions; (5) The height of 4-year-old Kandelia obovata in different regions was significantly higher (P<0.05) in the Xinmeizhou village, Longgang city than in the Shupaisha Island, while the diameter was significantly higher (P<0.05) in the Shupaisha Island than in the XimenIsland. The area of mangrove planting in Zhejiang Province has increased significantly in recent years; mangrove populations are growing vigorously, and the depression of early planted stands is high; the growth of Kandelia obovata varies significantly in different regions.

Key words: Zhejiang Province, mangrove forest, spatial and temporal distribution, Kandelia obovata, population growth

CLC Number: 

  • S718.5