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本文测定了368味兽用中药的11种元素(Cu、Fe、Mn、Zn、Ca、Mg、P、K、Na、Li、Se),分析了12类中药间各元素含量的相关性。结果表明:各类中药被测元素的总均值是平肝药>泻下药>补益药>解表药>止咳平喘药>活血化瘀药>祛风湿药>清热药>利水渗湿药>止血药>理气药>收涩药。多类中药均具有明显的元素谱证。作者认为,无机元素含量是影响中药传统分类的重要因素之一。  相似文献   
2.
贵州余甘果汁饮料加工研究   总被引:4,自引:0,他引:4  
研究了余甘果汁饮料的主要加工工艺及产品指标,选择出最佳配方和工艺参数,探讨了维生素C等营养成份的保存和单宁物质对果汁品质的影响。试验表明:糖度10%─15%,酸度0.38%─0.44%,天然维生素C50-70mg/100g,香精0.1‰─0.15‰时,饮料口感及色泽较好。  相似文献   
3.
不同树龄脐橙次生果黄化与树体矿质营养关系初探   总被引:1,自引:0,他引:1  
通过对不同树龄脐橙树体N、P、K、Ca、Mg、Fe、Mn、Cu、Zn等养分的测定表明:花、幼果及叶片中Ca含量是树龄长的树高于或显著高于树龄短的树;N、K含量则相反,是树龄短的树高于或显著高于树龄长的树;其它养分差异不显著。幼树初投产脐橙次生果黄化的高发生率与树体钙营养失调密切相关。  相似文献   
4.
A two-year study was conducted with an overall objective of characterising the structure and function of an arid rangeland in Kenya. A plot measuring 100 × 100m was used for this study. Data on rainfall and temperature were recorded at the plot site whereas data on evaporation rates and relative humidity were obtained from the meteorological office near the study site.

Herbaceous aboveground material was sampled at monthly intervals using a rectangular 0.25m2 quadrat frame. Clipped material was separated by species and classified dead or live by physical examination. A 5cm diameter metal soil corer was used to sample belowground plant material, at monthly intervals. The sampled material was washed with running water over 2mm sieves and classified dead or live using the vital staining technique. All weights and calculations were based on organic weight.

Total aboveground standing crop ranged from 84.6g m?2 to 295.4g m?2, with a mean of 162.3 ± 60.6g m?2. Mean monthly aboveground standing crop for 1992 and 1993 was 142.8 ± 53.8 and 178.5 ± 63.3g m?2 respectively. The two values were significantly different (p<0.10). Aboveground biomass yield ranged from 17.7g m?2 to 242.7g m?2, with a mean of 104.3 ± 58g m?2 and a coefficient of variation of 58%. Mean aboveground standing crop was 59 ± 24g m?2 Monthly values ranged from 28.8g m?2 to 120g m?2, with a 38% coefficient of variation.

The range for total belowground standing crop was from 83.3g m?2 to 232.7g m?2, and a mean of 155.2 ± 46g m?2. The values had a coefficient of variation of 30%. Mean total monthly belowground plant material yield for 1992 and 1993 was 137.6 ± 41g m?2 and 169.9 ± 46g m?2 The coefficients of variation were 59% and 28% respectively. The mean monthly belowground biomass yield was 51.6 ± 33g m?2 with a coefficient of variation of 64%. Mean monthly yield for belowground dead material was 103.7 ± 32g m?2, with a coefficient of variation of 31%. There was no significant difference (p>0.01) in the mean belowground dead material yield between 1992 and 1993.

In 1992, annual NPP was 439.2g m?2, giving a net primary productivity of 1.22g m?2day?l. Monthly NPP ranged from 17.2g m?2 to 90.1g m?2 In 1993, annual NPP was 944.5g m?2, equivalent to a net primary productivity of 2.62g m?2 day?1. Monthly NPP was between 27.4g m?2 and 548.6g m?2. Over the 1992–1993 period, NPP was 1 383.7g m?2, equivalent to a productivity of 1.92g m?2day?1. Trends in monthly NPP closely followed the trend in rainfall. On the whole, herbaceous vegetation production and productivity were episodic in nature and closely linked to rainfall. The high primary productivity puts arid and semi-arid rangelands under sharp focus as CO2 sinks, whose role in the amelioration of greenhouse effect could be more important than is currently appreciated.  相似文献   
5.
高接树脐橙次生果黄化与矿质营养关系初探   总被引:3,自引:0,他引:3  
本文研究了高接五年与高接三年的罗伯逊脐橙树幼果矿质养分含量。其结果表 明:Ca、N是高接五年的高于或显著高于高接三年的树;K则相反,是高接五年 的显著低于高接三年的树;其它养分如Mg、Fe、Me、Mn、Cu、Zn均有高接五年的高 于高接三年树的趋势。高接后当年的罗伯逊脐橙树细根可溶性碳水化合物含量 显著低于对照。高接后初结果树脐橙次生果黄化落果率高,与钙营养失调密切 相关。可溶性碳水化合物供给下降,使根系退化,新生根系受抑制。是导致钙 营养失调的重要因素。  相似文献   
6.
七彩山鸡肌肉及肝脏中12种矿物元素测定分析   总被引:4,自引:0,他引:4  
为了探讨七彩山鸡体内矿物元素的含量 ,开发安全的绿色营养食品 ,以及为其人工饲养的饲料添加剂配方与微量元素疾病的诊断提供科学依据。本研究采用火焰原子吸收光谱法测定分析了七彩山鸡胸肌、腿肌以及肝脏中Ca、Cu、Fe、Zn、Mn、Mo、Se、Co、Cd、Cr、Pb、Ag 12种矿物元素的含量。结果表明 ,肝脏中Ca、Cu、Fe、Zn、Mn、Cd和Cr的含量极显著高于胸肌和腿肌 (P <0 .0 1) ,其他元素差异不显著 (P >0 .0 5 )。Cu、Zn在胸肌与腿肌中的含量差异显著 (P <0 .0 5 ) ,其他元素均无明显差异 (P >0 .0 5 )。  相似文献   
7.
西南红、黄壤带内,水热条件十分优越,作物一年2—3熟,土壤生产潜力很大,是我国农林业的重要生产基地,本文从该区土壤发生分类、矿物组成、理化性质分析结果表明,西南红、黄壤发育的各种母质,以红粘土母质发育的土壤最深,可能为地带性土壤的代表,而发育于大勐龙原始林下的砖红壤尚因热量条件较低,矿物以高岭石为主,未见三水铝石区别于广东砖红壤以高岭[三水铝矿]为主。  相似文献   
8.
本文对西南红、黄壤矿物组成及电荷特性研究结果表明:红、黄壤是以可变电荷为主的土壤,黄壤的点电荷、永久电荷、可变负电荷都高于红壤,其差异性达极显著,可变电荷零点红壤高于黄壤。游离Fe2O3是产生正电荷的物质基础,结果表明红壤高于黄壤,其差异性也达极显著水平。  相似文献   
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