【作者】 李丹；

【导师】 王军强； 魏琴；

【作者基本信息】 西华师范大学 ， 农业（专业学位）， 2025， 硕士

【摘要】 本研究以云南地区优质软脚铁皮石斛种子为材料,系统研究了天然有机物添加物（椰乳、马铃薯、香蕉）对种胚萌发、原球茎增殖分化、壮苗生根等的影响。结合炼苗-驯化技术体系优化以及驯化过程中铁皮石斛活性成分（粗多糖、黄酮、粗纤维）、重金属生物富集以及农药残留（甲霜灵等）变化测定,结合温度、光照对铁皮石斛驯化苗生长的影响研究,优化了铁皮石斛组培生产关键技术。同时,通过工厂化生产成本和收入的系统分析,量化产量-价格-投资回报的敏感性关系,评估铁皮石斛工厂化栽培的经济效益。主要研究结果如下:（1）铁皮石斛种子萌发以添加10%（v/v）椰乳的发芽率最高,达95%,且发芽较快速;100g·L^-1马铃薯泥与2g·L^-1胰化胨次之,分别为82%与77%,而100g·L^-1香蕉泥添加效果最差,低于对照组。铁皮石斛原球茎在六种培养基中的增加倍数无明显差异。而在鲜重的增加方面,200g·L^-1马铃薯泥添加与3 g·L^-1胰化胨添加之间差异不显著,但是在实际生产过程中,由于胰化胨极易引起污染,故马铃薯泥更为实用。铁皮石斛幼苗在100g·L^-1香蕉泥和马铃薯泥中效果最好,而生根阶段以含200g·L^-1香蕉泥为最佳。（2）在铁皮石斛组培苗驯化期间,水苔是较适宜的小苗移栽基质,驯化阶段结束后转入定植阶段,树皮或树皮与草炭土结合成为最好的基质。以草炭土为基质进行驯化栽培,粗多糖含量最高,达到4.94g/100g。以树皮为基质进行驯化栽培,黄酮和粗纤维含量最高。驯化阶段,光照强度小于10000Lux更有利于铁皮石斛生长。刚移栽的出瓶苗,白天控温25±1℃,夜间控温20±1℃,空气湿度应保持在白天70±2%,夜间60±2%能够提高铁皮石斛成活率,另一方面,良好的通风也是提高铁皮石斛驯化苗成活率的必要条件。（3）从铁皮石斛工厂化生产成本效益分析可以看出,当产量从600公斤/亩增加到800公斤/亩时,利润增加54%,当产量从600公斤/亩降到300公斤/亩时,利润降低81%。当价格由100元/公斤升至150元/公斤时,利润增加81%,当价格由100元/公斤降至60元/公斤时,利润降低65%。在亩产600公斤的前提下,当销售价格为100元/kg时,资本回收期为5.19年,当产量提升到800公斤/亩时,资本回收期降低为4.07年。同等产量条件下（600公斤/亩）,当价格由100元/公斤降至60元/公斤时,利润降低65%,资本回收期由5.19年增加到11.07年,增加了2.13倍。产量提升到800公斤/亩时,价格波动对资本回收期的影响要小于600公斤/亩。综上所述,组培期间添加有机物有利于铁皮石斛种子萌发和原球茎增殖,驯化阶段以树皮或树皮与草炭土结合为基质,不但能够提高活性成分,且成本相对较低,同时也要兼顾光照和温度的变化。铁皮石斛工厂化生产过程中投入产出比以及投资回收期除了受产能影响之外,价格波动也是关键影响因子。更多还原

【Abstract】 This study utilized high-quality seeds of the Dendrobium officinale’Soft-foot’cultivar from Yunnan as experimental material to systematically investigate the effects of natural organic additives(coconut milk,potato,banana)on seed embryo germination,protocorm proliferation and differentiation,seedling strengthening,and rooting.By combining this with the optimization of the hardening-off and acclimatization technique system,and measuring changes in bioactive components(crude polysaccharides,flavonoids,crude fiber),heavy metal bioaccumulation,and pesticide residues(e.g.,Metalaxyl)during the acclimatization process,alongside research on the influence of temperature and light on the growth of acclimatized D.officinale seedlings,this research optimized key techniques for the tissue-culture-based production of Dendrobium officinale.Furthermore,through a systematic analysis of industrialized production costs and revenue,the study quantified the sensitivity relationships between yield,price,and return on investment,thereby evaluating the economic viability of the industrialized cultivation of Dendrobium officinale.Main findings are as follows:(1)Seed germination reached maximum efficiency(95%)with 10%(v/v)coconut milk supplementation,demonstrating rapid germination.Secondary effects were observed with 100 g·L?1potato mash(82%)and 2 g·L?1tryptone(77%),while 100g·L?1banana mash showed inferior performance compared to control.Protocorm proliferation showed no significant differences across six media formulations.For fresh weight increase,200 g·L?1potato mash and 3 g·L?1tryptone showed comparable effects,though potato mash proved more practical due to tryptone’s high contamination risk.Seedling development optimized with 100 g·L?1banana/potato mash,while 200 g·L?1banana mash yielded optimal rooting.(2)During acclimatization,sphagnum moss proved optimal for initial transplanting,with tree bark or bark-peat soil mixtures being superior at the planting stage.Peat soil substrate maximized crude polysaccharide content(4.94 g/100g),whereas tree bark substrate maximized flavonoid and crude fiber contents.Light intensity below 10,000Lux enhanced growth during acclimatization.Temperature control at 25±1°C(day)/20±1°C(night)with 70±2%(day)/60±2%(night)humidity improved survival rates for newly transplanted seedlings,with adequate ventilation being essential.(3)Industrial production cost-benefit analysis revealed:54%profit increase when yield rose from 600 kg/mu to 800 kg/mu,versus 81%profit reduction at 300 kg/mu.Price escalation from 100 to 150 yuan/kg increased profits by 81%,while price reduction to 60 yuan/kg decreased profits by 65%.At 600 kg/mu yield and 100 yuan/kg price,capital recovery period was 5.19 years,reducing to 4.07 years at 800 kg/mu.Under equivalent yield(600 kg/mu),price reduction to 60 yuan/kg extended capital recovery period from 5.19 to 11.07 years(2.13-fold increase).Yield increase to 800kg/mu mitigated price fluctuation impacts on capital recovery compared to 600 kg/mu.In conclusion,organic supplementation enhances seed germination and protocorm proliferation during tissue culture.Bark or bark-peat substrates during acclimatization improve active components with cost-effectiveness,requiring concurrent optimization of light and temperature conditions.For industrialized production,input-output ratio and capital recovery period depend critically on both production capacity and price fluctuations.更多还原