提取鲜茶汁加工速溶茶(英文)

传统方法加工速溶茶需用10倍以上沸水从干茶中提取茶汁,这不但消耗大量能源,而且茶叶香味明显降低.作者研究了从鲜茶叶直接提取鲜茶汁的方法,鲜叶经杀青提取绿茶汁.萎凋后提取红茶汁,摇整后提取乌龙茶汁.处理叶切碎后压榨,提取率约20～30％,鲜茶汁浓度7～8°Brix     

Economic Valuation of Varieties and Breeding Objectives

Breeding planning and variety valuation can be supported only if weighting factors for the economically relevant performance traits are available. In plant breeding they are necessary for the calculation of selection indices as well as for the comparison of varieties and for quantifying the monetary impact of breeding progress. In this article the economic weights for the most important performance traits of sugar beet are calculated from the farmer's, the sugar factory's, and the national economy's point of view. Based upon economic weights for beet yield, sugar content, potassium, sodium, and ammo nitrogen content, a total of 19 varieties was compared with regard to physical and economic performance. The investigation shows that “best” and “worst” varieties differ in gross margin per ha by 270.— to 330.— DM. Indications were given for possibilities and limitations of the application of economic weights in breeding planning.     

棉花新品种川碚2号的多抗性鉴定

 经多个菌系三年规范化鉴定结果,肯定新棉花品种川碚2号(B013—2)抗棉枯萎病性能好,耐黄萎病,对肾形线虫和枯萎病复合病害有耐病性,铃病亦较轻,是一个多抗性好的良种.     

Sortenbedingte Reaktion bei Lolium perenne L. auf systemisch selektiv wirkende Herbizide

Variety-specific reaction of Lolium perenne L. on selective systemic herbicides
The investigation intended to show the specific reaction of different varieties of Lolium perenne on selective systemic herbicides. These results can be regarded as the base for advanced explorations to the described topic. The results may be summarized as follows:
Independent of the stage of growth, the date of application, the dosage and the droplet size there were effects on the forage yield in correlation to the variety and the active ingredient. Measurable yield reductions were presented after CMPP application on the varieties of the late and after the treatment with Asulam on the varieties of the early maturity group. Compared to the maturity group the varietal attribute growthhabit demonstrated no significant effects. The active ingredients MCPB and MCPA presented not any measurable influence on the forage yield of the different varieties. In the main harvest year the yield depressions were manifested clearer than in the seeding year. In the same way the described secondary actions were larger after the treatment in an advanced stage.
Extended investigations should inquire to the causes and secondary effects on the forage quality. Beyond this for variety testings of species with a large distribution and volume it seems remunerative to include questions of herbicides tolerance.     

优质高产抗病新品种新陆早18号及高产栽培技术

着重介绍新陆早18号的品种特性、产量性状、纤维品质及抗逆性,并主要阐述新陆早18号的高产栽培技术。     

玉米单交种杂种优势与双亲主要性状搭配规律分析

在分析自交系种质血缘的基础上，根据其主要形态性状可以预见性地组配强优势单交组合。分析结果表明，玉米强优势单交种双亲性状搭配的主要组合方式是：株型上为上冲筒型×平展筒型和上冲筒型×上冲筒型；果穗类型上为长筒型×短粗筒型；出子率和千粒重上为大高型×大高型和偏高型×偏高型；雄穗发育上为中下型×适中型或发达型。雌穗吐丝上为快吐丝型和吐丝正常型间相互搭配。     

毛尖茶常见品质缺点及其成因

本文详细论述了毛尖茶常见品质缺点的类型、表现特征及其产生原因,对准确鉴别毛尖茶品质,科学地指导茶叶生产具有重要意义。     

永嘉县柿树资源调查

永嘉县从１９８７年开始，陆续对全县柿树品种资源进行调查，并整理出东皋长柿、牛心柿、方柿等８个农家品种类型。筛选出的以东皋长柿为主的无核或小核品种类型优株，已被确定为省林业厅优柿品种之一．     

Green tea flavan-3-ols and oligomeric proanthocyanidins inhibit the motility of infective larvae of Teladorsagia circumcincta and Trichostrongylus colubriformis in vitro

The effects of a hot water infusion and an aqueous acetone extract of green tea (Camellia sinensis) on the motility of infective larvae of the sheep nematodes Teladorsagia circumcincta and Trichostrongylus colubriformis were investigated under in vitro conditions. The infusion and extract dose-dependently inactivated the infective larvae as assessed by the larval migration inhibition (LMI) assay. To determine the components responsible for the inhibitory activity, the hot water infusion and aqueous acetone extract of green tea were fractionated on Sephadex LH-20 and the green tea extract fractions (GTE-I-VIII) characterised by mass spectrometry. The larvae were exposed to increasing concentrations of these GTE fractions. Fractions containing epigallocatechin gallate (EGCG) and proanthocyanidin oligomers were most effective. GTE fractions were more effective against T. circumcincta than T. colubriformis larvae as assessed by the LMI assay.     

放牧苜蓿品种选育研究进展

苜蓿放牧草地以其成本相对低(与干草型苜蓿草地相比)、营养价值高、放牧家畜生产性能优异得到了家畜生产者的青睐.长期以来苜蓿的利用一直是以生产干草为主,多数干草型品种的耐牧性并不好,因此选育耐牧性强的苜蓿品种是育种家的重要目标.国外1990年后推出的耐牧性品种不仅耐牧性强,且抗病虫害能力强、产草量高、适口性好.为此,从放牧型苜蓿品种的特点、选育指标、选育过程及放牧苜蓿品种的评价体系等方面,综述了放牧型苜蓿育种的研究进展,为今后我国放牧型苜蓿品种的选育提供指导.