此外，空气有多"干"，即"饱和水汽压亏缺"（VPD），也是影响树木生长的关键气候因子。VPD越高， 空气越"干"，树木为减少水分流失会关闭部分气孔，却也限制了光合作用和生长。在一些极端干燥的日 子里，即使阳光充足，树木甚至可能完全停止生长。 这就引出一个更重要的科学发现：城市树木的"碳吸收"（光合作用）和"碳储存"（茎干生长）在气候胁 迫下会出现"脱钩"，当树木仍在进行光合作用时，用于生长的碳分配（实际碳汇）却已暂停。这意味 着，虽然上海夏季变长了，植物看似生长时间更久，但实际上"没怎么长"，固碳作用也没那么大。理解 这种"源-汇脱钩"的机制和阈值，对于准确评估森林在气候变化下的碳汇功能至关重要。 上海交通大学农业与生物学院教授 殷杉 大家是否发现？2025年申城的桂香姗姗来迟。10月下旬，街头巷尾的桂花才仿佛接到统一指令，几乎同 步热烈绽放，盛花期较往年推迟了约三周。花信迟来，这正是气候变化发出的生态信号——植物生命节 律在世界变暖中发生深刻调整，将引发生态系统健康和植物碳汇变化等一系列连锁反应。 物候异常揭示气候影响 植物开花由内在生物钟与外界环境信号精密协同控制。桂花这类温带植物花芽分化完成后，需要经历 ...

Group 1 - The core point of the article highlights the delayed blooming of osmanthus flowers in regions like Shanghai and Zhejiang due to higher than usual temperatures this year, with blooms occurring over 20 days later than last year [3][7][10] - In Shanghai's Qingpu District, the first signs of osmanthus flowers are noted, with a subtle fragrance in the air, indicating the beginning of the blooming season [1] - In Hangzhou, the osmanthus flowers have just started to bloom, with most still in bud form, but conditions are expected to improve for a fuller bloom in the coming weeks [4][7] Group 2 - The article discusses the sensitivity of osmanthus flowers to temperature and humidity, noting that they typically require temperatures below 24°C to bloom effectively [8] - In Hefei, osmanthus flowers are experiencing a second bloom due to a recent drop in temperature, which has allowed previously interrupted blooms to resume [11][13] - The article also mentions the optimal viewing periods for other natural phenomena, such as the autumn foliage in Hebei and the golden poplar trees in Ningxia, indicating a broader seasonal trend in nature [14][19]

Core Insights - The article highlights the development of a provincial-level nursery in Yanzi Mountain Village, Zhushan County, Hubei Province, focusing on ecological restoration and green development [1][2] - The county has established a standardized, large-scale, and technology-driven seedling cultivation system to meet the demand for seedlings in national ecological restoration projects [1] Group 1: Nursery Development - The nursery features a variety of tree species, including local and rare species, aimed at enhancing biodiversity and supporting local ecological needs [1] - The county has integrated resources from leading companies and state-owned forest farms to create a multi-point support system for seedling cultivation [1] Group 2: Technological Advancements - Advanced technologies such as light substrate containers and tissue culture are being promoted to improve seedling survival rates and growth cycles [1] - The focus is on cultivating local tree species like bamboo, camphor, and osmanthus, while also nurturing rare species like Taxus and Phoebe [1] Group 3: Supply Chain Innovation - Zhushan County has implemented an "order production, unified supply, nearby cultivation, and targeted supply" model to ensure seedlings meet specific project needs [2] - The county has the capacity to produce over 12 million quality seedlings annually, providing stable support for ecological restoration in the region [2] Group 4: Future Development Plans - The county plans to deepen standardization in nursery construction and expand the integration of seedling cultivation, afforestation, and industry [2] - The goal is to position seedlings as both protectors of the ecosystem and contributors to rural revitalization, supporting high-quality development [2]

Core Points - The second wave of osmanthus flowers is blooming in Wuhan, with citizens enjoying the pleasant weather and fragrance in various parks [1][4][5] - The city parks have a significant number of osmanthus trees, with over 600 in the Liberation Park alone, and various other parks also showcasing the initial bloom [4][5] Group 1 - The Liberation Park features over 600 osmanthus trees, with the most concentrated area being Osmanthus Mountain [4][5] - Other parks such as Zhongshan Park, Guishan Park, and Yuehu Scenic Area also have osmanthus trees entering their initial blooming phase [4][5] - The osmanthus is considered a standard feature in Wuhan parks, with varieties including golden osmanthus, silver osmanthus, and fragrant osmanthus [5] Group 2 - The blooming period for osmanthus typically occurs from September to October, with flowers maturing in batches, resulting in three to four waves of blooms each year [5] - The golden osmanthus is noted for its vibrant color, abundant flowers, and strong fragrance, making it the most prevalent variety in the parks [5]

Core Insights - The delayed blooming of osmanthus in Hangzhou is attributed to climate sensitivity, with optimal blooming conditions requiring sustained average temperatures of 20°C to 22°C [1] - High temperatures during the National Day and Mid-Autumn Festival holidays have hindered the flowering process, but cooler air is expected to create favorable conditions for blooming by late October [1] Group 1 - Osmanthus is a climate-sensitive plant, with its flowering dependent on specific temperature conditions [1] - The prolonged high temperatures, referred to as "autumn tiger," have delayed the flowering signals for osmanthus [1] - Experts predict a concentrated blooming period for osmanthus in Hangzhou by late October [1] Group 2 - Green workers implement a detailed irrigation plan, watering in the early morning and late evening to avoid root damage from midday heat [2] - The irrigation strategy is tailored based on the size of the plants and soil moisture, ensuring adequate water supply for osmanthus trees [2] - During the flower bud differentiation period, workers provide osmanthus trees with a nutrient boost primarily consisting of phosphorus and potassium to prepare for blooming [2]

Core Viewpoint - The second wave of osmanthus flowers in Wuhan is expected to bloom soon due to favorable weather conditions, following the first wave that peaked during the National Day holiday [2]. Group 1: Flower Blooming Patterns - The first wave of osmanthus flowers bloomed around September 26, coinciding with the National Day and Mid-Autumn Festival holidays, leading to some residents missing the peak bloom due to travel [2]. - The blooming of osmanthus flowers occurs in waves, with each wave separated by about a week, allowing for 2-3 blooming waves within the same flowering period [2][3]. - The flower buds are currently swelling, with many buds appearing yellow-green, indicating that blooming will commence in the coming days [2]. Group 2: Osmanthus Varieties in Wuhan - The largest and most diverse osmanthus garden in Wuhan is located in the Huaguoshan Ecological Park, featuring 131 varieties and 260,000 osmanthus trees [2]. - The main varieties of osmanthus in Wuhan include Jin Gui (Golden Osmanthus), Yin Gui (Silver Osmanthus), Dan Gui (Sweet Osmanthus), and Si Ji Gui (Four Seasons Osmanthus), with each variety having specific blooming periods [2][3]. - Four Seasons Osmanthus, particularly the "Yueyue Gui" variety, can bloom almost every month, while the other varieties typically bloom from September to October [2].

Core Insights - The National Botanical Garden has opened its fourth Chrysanthemum Exhibition, featuring tens of thousands of chrysanthemums alongside other flowers, creating a vibrant autumn scene [1] - This year marks the first introduction of a cross-section display of the large chrysanthemum, showcasing its internal tying techniques to the public [2] Exhibition Highlights - The exhibition features three main areas: the core area, the "Elegant Fragrance" premium chrysanthemum area, and the "Chrysanthemum Sea" self-bred small chrysanthemum area [2] - The core area, covering 8,000 square meters, displays over 20,000 small chrysanthemums from 24 varieties, combining traditional gourd elements with colorful chrysanthemums to create a visually rich experience [2] - The "Elegant Fragrance" area showcases over 200 varieties with approximately 1,500 pots of chrysanthemums, including both traditional and new varieties, with the unique "Independence Chrysanthemum" set to bloom early for the National Day [2] Self-Bred Varieties and Events - The "Chrysanthemum Sea" area features over 100 self-bred chrysanthemum varieties with independent intellectual property rights, totaling more than 1,500 plants, with a flowering period from late September to early November [3] - The exhibition will host various educational activities, including lectures and interactive sessions to explore plant mysteries, alongside multiple themed exhibitions and a creative market showcasing over 100 plant-derived products [3]

Core Points - The "2025 Beijing Osmanthus Culture Festival" opened at the Summer Palace on September 23, featuring over 1,000 pots of osmanthus, including more than 70 ancient trees, and aims to create a city-wide autumn viewing event [1] - Various parks and cultural institutions in Beijing are collaborating to showcase osmanthus, with specific exhibitions planned at locations such as Xiangshan Park, the National Botanical Garden, and the Beijing Labor People's Cultural Palace [1][2][3] Group 1 - The Summer Palace will display over 230 pots of osmanthus, including ancient varieties, to enhance visitor experience [1] - Xiangshan Park will exhibit 36 pots of osmanthus, primarily focusing on golden osmanthus, from September 20 to October 15 [1] - The National Botanical Garden will showcase premium osmanthus varieties in a greenhouse setting from September 19 to October 12 [1] Group 2 - The Beijing Labor People's Cultural Palace will feature over 150 pots of osmanthus from late September to late October [1] - Yuyuantan Park will collaborate with the Summer Palace to display osmanthus pots for public enjoyment [2] - The China Garden Museum will exhibit 14 pots of osmanthus from September 22 to October 12 [3]

Group 1 - The article discusses the optimal time for harvesting osmanthus flowers, emphasizing the importance of selecting half-open flowers for better aroma [1] - It highlights the culinary uses of osmanthus, particularly in southern Chinese cuisine, where it is commonly paired with glutinous rice to create dishes like osmanthus cake [1] - The health benefits of consuming dried osmanthus are mentioned, including its potential to warm the spleen and stomach, alleviate digestive discomfort, and enhance appetite [1] Group 2 - The article provides safety guidelines for consuming edible flowers, advising against using flowers from public areas or those treated with pesticides [2] - It emphasizes the need for caution when trying new edible flowers, recommending starting with small amounts to monitor for allergic reactions [2] - The nutritional value of edible flowers is noted to be limited, primarily serving to enhance flavor rather than as a significant source of vitamins and minerals [2]

Core Viewpoint - The article highlights the beauty of Chinese plant names, showcasing their poetic and philosophical significance in relation to nature and life [2][19]. Group 1: Plant Names and Their Meanings - The rose is referred to as "Four Seasons Flower" due to its year-round blooming nature [4]. - The rapeseed flower is called "Yun Tai," which signifies its yellow color and tender shoots [5]. - The orchid is known as "You Ke" or "Xiang Zu," emphasizing its fragrant presence even in a room [6]. - The white poplar is called "Du Yao," symbolizing its straight and strong nature [7]. Group 2: Additional Plant Names - The pear flower is referred to as "Ying Zhou Yu Yu," linking it to the mythical fairyland [6]. - The jasmine is called "E Gu Jun," highlighting its green calyx [7]. - The red camellia is known as "Du Sheng," while the white camellia is called "Yu Ming" [8]. - The hibiscus flower is referred to as "Shun Hua," indicating its beauty [9]. Group 3: More Plant Names - The kiwi is called "Chang Chu," reflecting its presence in ancient poetry [10]. - The honeysuckle is known as "Ren Dong," symbolizing its resilience in winter [11]. - The pomegranate flower is referred to as "Liu Jin," indicating its vibrant appearance [12]. - The ginkgo tree is called "Ping Zhong," representing its green spring foliage [13]. Group 4: Final Plant Names - The osmanthus flower is referred to as "Guang Han Xian," linking it to celestial beauty [14]. - The bamboo is called "Bao Jie Jun," emphasizing its upright character [15]. - The water lily is known as "Ling Bo," connecting it to the mythological figure [16]. - The banana plant is referred to as "Shan Xian," highlighting its various names [17]. Group 5: Cultural Significance - The peony is called "Jiang Li," symbolizing love and parting [18]. - The chrysanthemum is known as "Jiu Hua," associated with the ninth month of the lunar calendar [19]. - The hibiscus flower is referred to as "Qi Zhang," indicating its beautiful appearance [20]. - The lotus flower is known as "Fu Qu" or "Han Dan," reflecting its poetic imagery in literature [20].