生态环境学报2017，Vol.26Issue(6)：956-963,8.DOI:10.16258/j.cnki.1674-5906.2017.06.007
地被物处理及补苗对华南退化荒坡乡土树种定居的影响
The Influences of Ground Cover and Recruitment Methods on Seedling Establishment of Castanea henryi and Psychotria rubraon A Degraded Hilly Land in South China
摘要
Abstract
In order to assist the early restoration of degraded hilly land in South China and appropriately use the ground covers and recruitment methods to accelerate the establishment of native trees on degraded land, this study adopted 3×2 factorial design and randomized block design to systematically discussed the influences of ground cover, seeding and transplanting methods on the establishment of native tree Castanea henryand Psychotria rubra in degraded hilly land. The results showed that, the recruitment ways (P=0.0130), interaction between species and recruitment methods (P=0.0287), and interaction between species and the management of ground covers (P=0.0134) significantly affect the biomass accumulation of seedlings.The specific performances were as followings: the removal of ground cover significantly accelerated the biomass accumulation of P. rubraseedlings. The average biomass of germinated seedlings changed from 1.31 g to 8.44 g, and the values was 6.75 g to 13.54 g for transplanted seedlings. The removal of understory vegetation and litters resulted in the leaf biomass of C. henryi and P. rubra transformed to their stems and roots (9% for C. henryi and 5% for P. rubra). The seedlings enhanced their absorption and transportation of water and nutrients in order to adapt to the effects of the removal of understory vegetation and litters. Direct seeding and transplanting manners did not influence the establishment ofC. henryi seedlings, but seedling transplantation significantly improved the establishment success and biomass accumulation of P. rubra seedlings. In conclusion, we could accelerate the establishment of P. rubra through the removal of understory vegetation and litters and select seedling transplantation method during the restoration of degraded hilly land in subtropical China. For C. henryi, we can adopt artificial seeding method to assist the species introduction and seedling establishment.关键词
幼苗更新/定居限制/成活率/锥栗/九节Key words
seedling recruitment/establishment limitation/survival rate/native species/germination分类
农业科技引用本文复制引用
孙中宇,常斌,杨龙,陈燕乔,王俊..地被物处理及补苗对华南退化荒坡乡土树种定居的影响[J].生态环境学报,2017,26(6):956-963,8.基金项目
国家自然科学基金项目(31400380) （31400380）
广东省科技计划项目(2016A030303044 （）
2015A030303014 （）
2017A020216022) （）
广东省自然科学基金项目(2014A030310225) （2014A030310225）
