共查询到19条相似文献,搜索用时 968 毫秒
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绿叶蔬菜工厂化生产关键技术研究 总被引:3,自引:0,他引:3
围绕绿叶蔬菜的清洁高效生产和均衡供应需求,借鉴日本、荷兰等国家植物工厂发展的先进经验,针对绿叶蔬菜工厂化生产的关键环节和技术突破点,以小白菜的工厂化生产为例,综述了品种选择、基质研发、肥水运筹、节能生产、绿色防控、物流加工、质量管理等关键设备与技术研究进展,探索符合中国国情的有机生态型绿叶蔬菜工厂化生产的可行性。 相似文献
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温室大棚是我国北方冬季生产蔬菜的保护地措施.长期以来大多用于冬春季生产西红柿、茄子、辣椒等茄果类蔬菜,早春黄瓜、西葫芦等瓜类蔬菜及韭菜、芹菜等绿叶蔬菜。近年,伴随全国南北农区大面积商品蔬菜远销基地的建立和商品蔬菜全国性流通大市场的形成,以寿光为代表的山东省大面积商品蔬菜运销东北,并已形成较大的市场占有份额。由于这一影响及本区近年各地又新增加较大的保护地面积,因而使蔬菜产销及价格的竞争变得更加激烈。对于占有相当大比例的多年一贯制生产固定品种蔬菜的地区及菜农则所受影响更大,最明显的就是产销的逐年比较… 相似文献
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正上海市民喜食绿叶蔬菜,上海市政府为保证绿叶菜稳定均衡供应,在全市建立了1.4万hm2绿叶菜功能保障区,种植鸡毛菜、青菜等绿叶蔬菜的种植户可享受多项政府补贴。但上海地区夏季高温干旱、台风暴雨等气候因素常导致绿叶蔬菜生长困难,绿叶菜产量低、品质差,再加上夏季是病虫害发生高峰期,农户常大量使用农药,蔬菜食用安全难以得到保障。为此,我们通过在设施菜地实施"双绿(绿色综合防控技术、绿叶蔬菜)"工程为菜农总结出一套优质、高效、安全的高温季节绿叶菜生产技术规范,以提高上海地区绿叶蔬菜 相似文献
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上海绿叶蔬菜产销的技术保障 总被引:1,自引:0,他引:1
近年来设施绿叶蔬菜基地建设进展很快,为上海绿叶蔬菜的生产及市场供应发挥了积极的作用,特别是应对台风以及重大雪灾的能力得到了显著提升,近年来未出现大面积设施损坏的现象。但面对常态化极端气候,郊区的绿叶蔬菜生产显得保障能力不足。供应保障能力涉及较多因素,如基础设施条件、效益、市场风险以及人工成本等, 相似文献
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当前蔬菜产业补贴政策措施、问题与对策 总被引:1,自引:0,他引:1
<正>在回顾中国蔬菜产业补贴政策历史沿革的基础上,从蔬菜生产环节、经营环节及政策性蔬菜保险三方面总结了现阶段地方政府蔬菜产业补贴政策的主要措施,并分析了中国蔬菜产业补贴政策存在的主要问题,进而提出了未来的改革方向,如建立基本蔬菜生产补贴的长效机制、减少政府对价格的直接干预等。作为农业特色产业之一,蔬菜产业的弱质性、外部性与多功能性,决定了对其实施补贴的必要性和重要性(穆月英,2012)。随着城镇化步伐的加 相似文献
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文章从生产面积变化、生产格局、经营方式等方面分析苍梧县的蔬菜产业现状,并从生产效益、生产总量、市场调控、产销体系、市场规模、体制机制等方面分析存在问题,最后针对存在的问题提出加强组织领导,健全工作机制;强化政策扶持,加快基地建设;强化科技支撑,狠抓品牌建设,做好蔬菜营销;狠抓预冷库和市场建设,调整蔬菜种类比例,稳定蔬菜价格等具体对策措施,以期促进行政区划调整后苍梧县蔬菜产业健康快速发展。 相似文献
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H. M. S. Al Ubeed M. C. Bowyer J.B. Golding 《The Journal of Horticultural Science and Biotechnology》2019,94(5):620-626
Hydrogen sulphide (H2S) inhibits senescence in harvested fruit and vegetables but presents logistical, safety and regulatory issues to become a commercial treatment. D-cysteine and L-cysteine are semi-essential amino acids that are metabolised to hydrogen sulphide by plant tissues albeit by different pathways. This paper examines the effect of cysteine on postharvest senescence of three green leafy vegetables. Spraying pak choy leaves with 10 mmol D-cysteine, L-cysteine or DL-cysteine inhibited leaf senescence through a delayed loss of green colour expressed as market life, reduced respiration rate and reduced ethylene production. The beneficial effects of cysteine were similar to those achieved by fumigation with hydrogen sulphide. L-cysteine sprays on parsley and peppermint leaves also showed reduced leaf colour loss and respiration compared to untreated leaves. Cysteine, either as the racemate or individual enantiomers, is considered to have commercial potential for green leafy vegetables as it provides the beneficial effect of hydrogen sulphide but should be easier to register for commercial use due to the GRAS status of L-cysteine. 相似文献
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我国蔬菜价格周期性波动规律分析 总被引:2,自引:0,他引:2
近年来,我国蔬菜价格波动频繁,卖难、买贵现象时有发生。本文采用HP 滤波法和BP 滤波法,分析了我国2004~2013 年蔬菜及主要品种的价格波动规律。通过分析得出,我国蔬菜价格呈总体增长的线性趋势,季节性变化特征明显,无明显随机性波动特征;产区集中的耐贮品种具有较明显的价格波动周期,季节性波动相对明显;产区分散的耐贮品种无明显的价格波动周期,季节性波动较明显;大棚菜和叶菜类价格波动受天气因素影响较大,季节性波动明显,无明显周期波动特征。 相似文献
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以适合阳台栽植的菜心、白菜和芥菜3种叶菜的9个品种为材料,在施肥处理上采用常规管理与水肥一体化两种模式,初步探索了阳台蔬菜在两种栽培模式下的生长和发育状况。试验结果表明,在相同施肥管理栽培模式下,不仅菜心、白菜与芥菜3种蔬菜间的产量存在差异,且相同蔬菜的不同品种的地上部鲜质量也存在差异,但是菜心、白菜和芥菜均一致表现出在水肥一体化栽培模式下的植株地上部鲜质量高于常规管理模式,增幅分别为13.83%~51.60%、34.26%~35.24%、16.36%~26.70%,植株收获期根冠比则均低于常规管理模式。 相似文献
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Andrea Giro Antonio Ferrante 《The Journal of Horticultural Science and Biotechnology》2016,91(6):603-610
Corchorus olitorius is mainly cultivated in Africa and is used in the human diet for its nutraceutical proprieties. In this work, C. olitorius was grown in a floating system using a standard (NS100%) or halved (NS50%) nutrient solution. Yield was evaluated at harvest when plants reached the baby leaf stage. Quality of leaves was estimated by measuring sugars, nitrate, chlorophylls, carotenoids, polyphenols, and anthocyanins. Yield was similar to other common leafy vegetables cultivated in floating systems. Analytical determinations showed good levels of antioxidant compounds and sugars. Mineral contents were relevant for Ca, Mg and Fe in comparison with C. olitorius cultivated in soil and other common leafy vegetables. Results showed these plants had healthy characteristics for human nutrition, in particular for women and children. C. olitorius had a good performance in the floating system with yield ranging from 0.8 to 2.4 kg m?2. Mineral nutrient levels were higher than in the major leafy vegetables. Nutrient solutions influenced anthocyanin accumulation (+37% in NS50% in spring and +48% in NS50% in summer). Leaf nitrate content was –50% in NS50% at spring cultivation. The overall quality parameters suggest that C. olitorius can be an optimal candidate for baby leaf production in the fresh cut leafy vegetable industry. 相似文献