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社区型生态系统价值核算研究——以滨湖桃源生态社区为例
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作者 陶建格 张明慧 《农业与技术》 2023年第2期86-89,共4页
“绿水青山就是金山银山”的论断指出了自然生态系统不仅为人类提供了丰富的生态产品与服务,具有巨大的经济效益,其生态价值还可以转化为经济价值造福人类。积极探索社区型生态系统价值核算是认识生态价值、将生态价值转化为经济效益的... “绿水青山就是金山银山”的论断指出了自然生态系统不仅为人类提供了丰富的生态产品与服务,具有巨大的经济效益,其生态价值还可以转化为经济价值造福人类。积极探索社区型生态系统价值核算是认识生态价值、将生态价值转化为经济效益的基础。本文在社区型生态系统价值核算框架基础上,以滨湖桃源生态社区为例进行应用探索,说明社区型生态系统的价值应当引起人们的重视,对城市可持续发展具有积极意义。 展开更多
关键词 社区型生态系统 生态社区 生态价值 滨湖桃源
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Community Based Seed Production-A Sustainable Seed Production Model for Subsistence of Bhutanese Maize Farmers
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作者 Tirtha Bdr. Katwal Doriji Wangchuk +2 位作者 Namgay Wangdi Rinzin Choney Lhap Dorji 《Journal of Food Science and Engineering》 2015年第2期76-84,共9页
Bhutanese maize farmers grow different open-pollinated traditional varieties and improved high yielding varieties recommended by the national maize program. All most every maize farmer uses the recycled seeds from the... Bhutanese maize farmers grow different open-pollinated traditional varieties and improved high yielding varieties recommended by the national maize program. All most every maize farmer uses the recycled seeds from their farms for planting in the next season. Farmers traditional or informal seed system was found to be poorly organized and unscientific that has resulted in the deterioration and contamination of seed quality. Bhutanese maize farmers living in remote areas are highly constrained by the inconsistent supply and poor access to good quality maize seed. The formal public seed sectors lack adequate resources to produce and supply good quality seeds. This called for an urgency to identify and adapt an innovative and a sustainable seed production approach to service the subsistence needs of Bhutanese farmers in a cross-pollinated crop, like maize. The community based seed production (CBSP) approach was introduced and evaluated under the Bhutanese maize production system as an alternative farmer based seed production model. A total of seven farmers CBSP groups were formed and promoted as a smallholder seed enterprise. The technical skills of these CBSP group members on maize seed production were improved through practical demonstrations and trainings. The CBSP groups were supplied with high quality source seed of new maize varieties by the national maize program. For long term, the sustainability of CBSP groups were linked to the formal seed sector in the country for marketing the seeds. The CBSP approach has proven to be a successful small scale maize seed production model under highland maize production ecosystem that has improved the production and supply of good quality maize seeds. The Bhutanese experiences with CBSP in maize, its merits for small holder Bhutanese maize farmers and lessons learnt from the CBSP model are discussed in this paper. 展开更多
关键词 Seed system sustainability CBSP open-pollinated variety (OPV) seed replacement rate CBSP groups.
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