首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   47篇
  免费   2篇
  国内免费   2篇
林业   7篇
农学   6篇
基础科学   1篇
  6篇
综合类   16篇
农作物   1篇
水产渔业   1篇
畜牧兽医   3篇
园艺   7篇
植物保护   3篇
  2021年   6篇
  2020年   3篇
  2019年   2篇
  2018年   1篇
  2017年   1篇
  2016年   6篇
  2015年   2篇
  2013年   3篇
  2012年   3篇
  2011年   2篇
  2010年   4篇
  2009年   2篇
  2008年   4篇
  2007年   3篇
  2006年   2篇
  2004年   1篇
  2003年   2篇
  1999年   1篇
  1985年   1篇
  1984年   2篇
排序方式: 共有51条查询结果,搜索用时 15 毫秒
1.
于2005年引进的10 000株红马叙葡萄柚在广西南宁栽培试种,并建立葡萄柚试验示范园。经多年的观察结果表明,该品种第3年开始结果,适应广西南宁的气候条件和土壤特点,具有外观漂亮、丰产优质、经济效益较好、适合本地发展等特点。并初步总结出一套包括建园、定植、肥水管理、整形修剪、果实套袋和主要病虫害防治技术。  相似文献   
2.
提取方法对葡萄柚精油性质与组成的影响   总被引:1,自引:0,他引:1  
葡萄柚精油是柑橘精油的重要类别,具有清新、浓郁的特征果香,是一种广受欢迎的天然香精。为了研究提取方法对葡萄柚精油表观特征、物理性质及化学组成的影响,文章分别以蒸馏法和冷榨法制备葡萄柚精油,采用气质联用(GC-MS)分析其化学组成。结果表明蒸馏法的精油得率远高于冷榨法,但冷榨法所得精油的色泽和气味更接近天然葡萄柚,折光率和相对密度也更高;蒸馏法所得精油含有39种可检测化合物,其中含氧化合物18种,相对含量为14.11%,而冷榨法所得精油含37种可检测化合物,16种为氧化物,相对含量达17.18%,尤其是芳樟醇、葵醛、柠檬醛等特征香气成分的含量明显高于前者,表明冷榨法比蒸馏法更适宜制备高品质葡萄柚精油。  相似文献   
3.
葡萄柚适宜采收期与采后货架寿命研究初报   总被引:1,自引:1,他引:0  
通过对不同采收期的葡萄柚果实总糖含量、可滴定酸、可溶性固形物含量的测定分析和感官特性的评价,表明随着采收期的推迟,果实含糖量、可溶性固形物含量增高,可滴定酸含量降低.在常温货架陈列期中,12月下旬采收的果实陈列效果较好,保持优良商品外观品质的时间较长。综合各种因素,葡萄柚在云南西双版纳善文区域12月25日左右采收最好。  相似文献   
4.
以湖南香柚皮为原料,采用溶剂法和超声波辅助法对柚皮中黄酮类物质的提取工艺进行研究,其最佳提取工艺为:固液比1∶25(g/mL),乙醇体积分数80%,超声波提取时间60min,溶液pH值7.0,黄酮类物质的提取率达2.42%。  相似文献   
5.
A comparison was made of the response to storage temperatures (0–17°C) of grapefruit ‘Shamouti’ and ‘Valencia’ oranges, and lemon fruit. There was no chilling injury (CI) and the incidence of rot was relatively low at 12°C or higher for all cultivars. At low storage temperatures, however, pitting and subsequent rot development in grapefruit and in ‘Shamouti’ and ‘Valencia’ oranges were highest at 6°C, while in lemon the incidence of these disorders rose with the decrease in storage temperature, and was highest at 2°C. Grapefruit and ‘Shamouti’ oranges exhibited the highest susceptibility to CI, lemon showed an intermediate susceptibility, and ‘Valencia’ orange a very low one. In grapefruit, severe peel pittings that developed in cold storage were covered by mold rots during cold storage and shelf-life, but in ‘Valencia’ and particularly in ‘Shamouti’ oranges the incidence of decay during cold storage was low. During shelf-life, a pronounced CI-induced increase in the incidence of mold rots was evident. This breakdown during shelf-life may be associated with microscopic peel injuries which are formed during cold storage and covered by mold rots during shelf-life. Increased susceptibility of the cultivar to CI could be correlated with an increase in ethanol content at low temperatures.  相似文献   
6.
美国葡萄柚营养成分分析与评价   总被引:7,自引:1,他引:6  
对西双版纳普文林场引种的葡萄柚品种进行外观性状及化学成分分析,并对其营养品质进行了综合分析。结果表明,不同品种的单果质量、可食率、可溶性固形物含量、柠檬酸含量、总糖含量、和维生素C含量的差异明显,其变化幅度依次为350~550 g,70%~75%,7%~11%,0.9%~1.7%,3.49%~6.03%,20~30 m g/(100 g)。不同品种的果形指数差异较小。由此得出哈路比、亨路比、里德马叙、里约红、星路比的综合营养品质较好,矮化、火焰的综合营养品质较差。以期为开展葡萄柚品种区划及制定分级标准提供必要的参考和依据。  相似文献   
7.
Differences in chilling injury susceptibility of grapefruit from exterior and interior tree canopy positions were used to investigate the hypothesis that water loss is related to chilling injury symptom development during low-temperature storage. The sun-exposed surface of grapefruit from exterior canopy positions was more susceptible to chilling injury and had lower diffusive resistance than the shaded surface of the same fruit. Reducing the rate of fruit transpiration during the first week of storage by a pre-cooling treatment prior to low-temperature storage delayed, but did not eliminate, the development of chilling injury.  相似文献   
8.
After a brief overview of the general production, market value, and uses of citrus by-products, this literature review will focus on the most highly refined “pharmaceutical grade” citrus oils and antioxidants that have been derived from peels or other fruit parts. Citrus oils have been used as a part of the perfume industry and in the practice of alternative medicine for a long time, but now there is a great deal of mainstream food processing and drug industry interest in them owing to the rediscovery or confirmation of some of their beneficial properties, as well their development for entirely new applications. Their roles as antimicrobial, immunomodulatory, and cancer chemopreventive or chemotherapeutic agents appear promising.  相似文献   
9.
A trial was conducted during two years (2000/01 and 2001/02) on two sites using ‘Shambar’ grapefruit trees grafted to five rootstocks. The sites were located on the Greek island of Kos to evaluate the effect of rootstock and location on fruit production and leaf mineral composition of ‘Shambar’ grapefruit. Results indicated that yields were higher in 2001/02 than in 2000/01 and these differences were greater at site 2. Leaf nitrogen (N), potassium (K), zinc (Zn), and to some degree phosphorus (P) content was slightly deficient to deficient for the majority of the samples taken. Calcium (Ca) and magnesium (Mg) levels ranged from normal to high. The copper (Cu) and iron (Fe) leaf contents and the manganese (Mn) content of most samples were in the optimum range. The interactions between rootstock, site, and year upon yield and nutrient content were statistically significant. There were also significant correlation coefficients between yield and nutrient content as well as among the nutrients.  相似文献   
10.
葡萄柚柚皮苷微波提取工艺   总被引:2,自引:0,他引:2  
为建立葡萄柚皮中柚皮苷的提取工艺,本文通过单因素试验研究了乙醇浓度、微波功率、料液比、微波时间4个因素对葡萄柚中柚皮苷提取率的影响,并在此基础上用正交试验进行工艺参数的优化。结果表明:微波提取的影响因素顺序为液料比>时间>浓度>功率;葡萄柚柚皮苷提取的最佳条件为:液料比60∶1(mL/g),提取溶剂80%乙醇,微波时间30 s,微波功率160 w,两次提取。此条件下柚皮苷的提取率为5.94%。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号