贵州茶树种质资源遗传多样性、群体结构和遗传分化研究

以144份贵州茶树种质资源为材料,采用68个EST-SSR标记探究其遗传多样性、群体结构及遗传分化.结果表明,144份茶树种质资源按海拔范围及种都可以分为3类,Gro1代表海拔1500 m以上的大厂茶群体,Gro2代表海拔范围1000～1300 m的茶群体,Gro3代表海拔不明显、种不明显的群体.144份茶树种质资源按...     

虫茶联合缬沙坦治疗原发性高血压临床观察

目的 观察虫茶联合缬沙坦治疗原发性高血压的疗效。方法 将符合诊断标准的144例原发性高血压患者随机分为两组,治疗组72例给予虫茶及缬沙坦治疗,对照组72例单纯应用缬沙坦治疗。两组连续治疗4周后比较其临床疗效。结果 治疗组显效率为40.3%,总有效率为87.5%,对照组分别为25.0%和76.4%,两组疗效比较差异有统计学意义（P<0.05）。两组治疗后收缩压及舒张压比较差异有统计学意义（P<0.05）,治疗组优于对照组。结论 虫茶联合缬沙坦治疗原发性高血压疗效确切。     

黔湄系列品种与云南大叶种所制普洱茶的比较分析

为了解黔湄系列品种所制普洱茶品质,以晒青、炒青为原料,采用普洱茶熟茶发酵工艺生产普洱茶,并用云南大叶种普洱茶为对照进行比较分析。结果表明:黔湄系列普洱茶滋味带鲜爽味、叶底嫩、化学成分氨基酸含量远远大于云南大叶种普洱茶的含量。可为贵州茶产业多样化发展提供理论依据。     

茶叶贮藏过程中品质变化及其影响因素研究进展

本文介绍了茶叶贮藏过程中,温度、湿度、光照和氧气等外界环境因素对其品质的影响,以及贮藏中茶叶品质成分,如含水量、氨基酸、茶多酚、叶绿素和维生素等的变化;并对目前生产与研究提出了初步想法。     

明清以来闽台茶产业发展史研究进展

福建历来为产茶大省,明清以来其茶产业发展对台湾有重要影响。闽台茶产业的互动模式和发展路径,在世界茶产业界举足轻重,对其学术价值则尚待挖掘。明清以来闽台茶业演进过程中,产生了一批著名茶商,其经营思想和业绩,对当前我国茶业发展仍具借鉴意义。该文对台湾和大陆关于明清以来闽台茶业发展史的文献进行了较系统和全面的梳理和综述,以此为基础,从以茶为缘、以商为本、以技为重、以史为鉴四个方面,提出进一步深化和拓展该领域研究的建议。     

黄光萎凋对红茶品质的影响

在萎凋过程利用黄光照射茶叶,分析黄光处理对红茶品质的影响。结果表明,黄光照射处理对红茶的外形和汤色品质影响较小,香气和滋味品质显著提高,香气的甜度以及滋味的鲜爽度和甜度显著提高。理化分析结果表明,除多酚和可溶性糖外,黄光处理对红茶的儿茶素、茶黄素、氨基酸和香气成分的影响较显著。红茶经过黄光处理后,其儿茶素总量提高21.6%、茶黄素含量提高17.6%、氨基酸含量提高6.8%,香气总量增加21.7%,而醛酮类和烷烯烃类变化较小。     

Effects of difference in fertilization treatments on nitrification activity in tea soils

Abstract

It is generally recognized that the nitrification activity in acid soils is very low. Indeed, nitrification in mineral soils has been found to be negligible at pH values below 5.0 (Dancer et al. 1973; Nyborg and Hoyt 1978). However, it was reported that autotrophic nitrification occurred in some tea soils at pH levels far below 5.0 (Walker and Wickramasinghe 1979; Hayatsu and Kosuge 1993). An acidophilic ammonia-oxidizing bacterium has been recently isolated from strongly acidic tea soils in Japan (Hayatsu 1993). On the other hand, fertilization has-been considered to be an important factor influencing nitrification in agricultural soils. For example, several studies have shown that the addition of ammoniacal fertilizer to soils can lead to the increase of the populations of Nitrosomonas (McLaren 1971; Ardakani et al. 1974). Liming of acidic soils also tends to stimulate the nitrification activity (Dancer et al. 1973; Nyborg and Hoyt 1978). Although nitrification has been studied in a wide variety of agricultural soils, there is little information available on nitrification in tea soils. The effect of fertilization on nitrification in tea soils is poorly documented.     

8个茶树品种的黑茶适制性研究

品种是决定茶叶品质的基础,目前黑茶缺乏专用品种.本研究对尖波黄13号等8个湖南主栽茶树品种进行了黑茶适制性研究.感官审评结果表明:在5%显著性水平下,桃源大叶和槠叶齐感官审评结果显著优于其它6个茶树品种.不同品种不同季节鲜叶水浸出物、儿茶素、茶氨酸、氨基酸总量、咖啡碱、粗纤维、还原性糖7个指标与相应黑茶感官审评结果相关性分析表明:春季氨基酸总量和粗纤维分别与感官审评呈显著正相关和显著负相关;夏、秋季咖啡碱、水浸出物、还原性糖、粗纤维与感官审评结果的相关性基本一致,都达到了显著相关(粗纤维为显著负相关,其余为显著正相关),儿茶素在夏季表现为显著负相关,其余各指标与感官审评结果相关性较低.考虑到氟对黑茶质量安全的重要性,本研究还对8个品种一芽五叶氟含量进行了测定,结果表明:8个参试品种氟含量都小于300 mg·kg-1.     

The anaesthetic‐like effect of tea tree oil in common carp Cyprinus carpio L.

This study investigated the efficacy of tea tree oil (TTO) as an anaesthetic for common carp, Cyprinus carpio L., by estimation of behaviour changes and responsiveness to being taken out of the water. All applied concentrations (from 0.2 to 0.6 mL L⁻¹) resulted in sedation and immobilization. The lowest effective concentration (induction time ≤3 min, recovery time ≤10 min after 15 min of exposure) was 0.5 mL L⁻¹. Exposure in excess of 30 min at a concentration of 0.5 mL L⁻¹ caused mortality. TTO displayed distinct general anaesthetic‐like properties, fulfilling the basic requirements for a potent fish anaesthetic.     

早生优质高产绿茶新品种玉绿的选育

为选育优质绿茶新品种,以薮北种(♀)×优混(♂)人工杂交后代为育种材料,经系统选种、无性繁殖,育成了早生优质高产绿茶新品种“玉绿”.经多年品比试验、省级区试和多点试种,结果表明,“玉绿”为早芽种,春季萌发期与福鼎大白茶(对照)相当;产量高,经方差分析差异达极显著水平;内含物丰富,水浸出物、茶多酚和氨基酸均高于对照;适制绿茶,成品茶、汤色和叶底具有明显的“三绿”特征;抗寒性、抗旱性较强,均超过对照,抗瘿螨与对照相当.“玉绿”新品种于2005年通过湖南省农作物品种审定委员会登记.