Study on Rational Fertilization Scheme for Mulberry(Morus alba Linn) Used for Tea

[Objective] This study was conducted to investigate effects of application amounts of N, P and K and their ratio on tea quality components in mulberry leaves. [Method] Effects of sole application and combined application of N, P and K on the yield and tea quality components of spring mulberry leaves were studied by 3-factor 3-level experiment, based on previous experiments. [Result] Combined ap- plication of 3 of N, P and K was better than sole application and combined appli- cation of 2 from them. Insufficient or excessive fertilization both significantly reduced yield of mulberry leaves and contents of tea quality components, such as 1-de- oxynojimycin （DNJ）, flavonoids, tea polyphenols and amino acids. With the yield of spring mulberry leaves as a target, it is advised to apply N, P and K at rates of 240, 150 and 60 kg/hm^2 , respectively. [Conclusion] This study provides reference and theoretical basis for the establishment of raw material base of high-quality mul- berry tea.

Chinese EFL Teachers' Attitudes toward Corpus Use in Collocation Instruction

The purpose of the present study was to investigate Chinese EFL(English as a Foreign Language)teachers’attitudes toward corpus use in collocation instruction.Fourteen Chinese EFL teachers from seven different colleges or universities answered a questionnaire asking their perceptions about corpus use in collocation instruction.The statistical analysis revealed that significant difference(t=2.449,df.=9,p=.037<0.1)was found between males and females in their perception of the learnability of the searching technique in collocation corpus.Besides,the result also revealed that significant differences were found between novice and experienced teachers’perception of helpfulness of corpus in writing native-like sentences(t=5.75,df=11,p<0.1),identifying collocation errors in English(t=5.75,df=11,p<0.1),usefulness of corpus in searching for English collocations(t=2.93,df=12,p<0.1),and advocacy of corpus to colleagues(t=5.75,df=11,p<0.1).Finally,some pedagogical implications were put forward.

Assessment of soil degradation and chemical compositions in Rwandan tea-growing areas

This study has focused on the processes of soil degradation and chemical element concentration in tea-growing regions of Rwanda,Africa.Soil degradation accelerated by erosion is caused not only by topography but also by human activities.This soil degradation involves both the physical loss and reduction in the amount of topsoil associated with nutrient decline.Soil samples were collected from eleven tropical zones in Rwanda and from variable depth within each collecting site.Of these,Samples from three locations in each zone were analyzed in the laboratory,with the result that the pH of all soil samples is shown to be less than 5（pH〈5） with a general average of 4.4.The elements such as iron（Fe）, copper（Cu）,manganese（Mn）,and zinc（Zn） are present in high concentration levels.In contrast calcium （Ca） and sodium（Na） are present at low-level concentrations and carbon（C） was found in minimal concentrations.In addition,elements derived from fertilizers,such as nitrogen（N）,phosphorous（P）,and potassium（K） which is also from minerals such as feldspar,are also present in low-level concentrations. The results indicate that the soil in certain Rwandan tea plantations is acidic and that this level of pH may help explain,in addition to natural factors,the deficiency of some elements such as Ca,Mg,P and N.The use of chemical fertilizers,land use system and the location of fields relative to household plots are also considered to help explain why tea plantation soils are typically degraded.

Development and Application of Green Pest Control Technology in Tea Garden

A discussion on the necessity of green control of tea pests in tea gardens was conducted on the basis of the development process from traditional control, chemical control to green and ecological control. The connotation of green control in tea gardens was analyzed, and physical control and chemo-ecological control, biological control and agricultural control respectively were introduced. Besides, the rational selection and precise use of pesticides were proposed and current problems in the green control of tea gardens in China were introduced.

Prospect of Fuelwood Plantations for Marginal Small Tea Farmers: A Case Study in Matara and Badulla Districts, Sri Lanka

This study demonstrates the importance of conversion of tea farms in marginal land to fuelwood plantation by analyzing the current biophysical, economic and institutional pros and cons of each land uses for marginal small tea plantation holders (MSTH). The study is based on household survey and field investigation conducted in Matara and Badulla Districts of Sri Lanka. Both qualitative and quantitative data on important biophysical, economic and institutional factors was collected from a total of 81 MSTH, 50 from Matara and 31 from Badulla, and fuelwood consuming industries within 20 km of the study area. The result showed that MSTH are facing biophysical and economic problems that are forcing them to leave portion of their tea planation land uncultivated. With ongoing demand increase for fuelwood, presence of tree species already adaptable to the area and favorable property right condition, conversion of the existing marginal land to fuelwood plantation is a viable way to sustainably manage the MSTH farmland. This will also contribute to tackle environmental disasters the area is frequently facing due to abandoning of the marginal tea plantation land.

扩种茶园绿肥的必要性及发展对策

针对当前我国茶园土壤肥料施用存在的主要问题,提出了扩种茶园绿肥的必要性,分析了发展茶园绿肥的潜力和茶园绿肥生产面临的主要问题,探讨了未来茶园绿肥生产的对策。

乌龙减肥茶的临床疗效观察

应用乌龙减肥茶治疗单纯性肥胖症２７２例，高甘油三酯血症７１例、高胆固醇血症６７例，总有效率分别为８４．５６％、５７．７５％和５２．２４％；显效率分别为３１．２５％、４６．４８％和３４．３３％。本品具有升清降浊，减肥消脂、醒脾祛湿、润肠通便的功能，并有一定的降血压作用。

茶叶再造薄片感官评价及其卷烟应用

对茶叶再造薄片的烟气和感官质量进行了评价,探讨了茶叶再造薄片在卷烟CPY-1和CPY-2中的应用。结果表明:茶叶再造薄片的烟气烟碱量为0,应用茶叶再造薄片制得2种3 mg超低焦油卷烟,其焦油、烟碱、总粒相物和一氧化碳量明显降低。在CPY-1卷烟中使用茶叶再造薄片可提高感官质量。在CPY-2卷烟中掺入不同比例的茶叶再造薄片均能改善感官质量,并能产生不同的产品风格。茶叶再造薄片的生产成本低于烟草再造薄片。

Study of ciprofloxacin removal by biochar obtained from used tea leaves

In this study, used tea leaves （UTLs） were pyrolyzed to obtain used tea-leaf biochar （UTC）, and then the UTC was used as an adsorbent to remove ciprofioxacin （CIP） from aqueous solutions. Batch experiments were conducted to investigate the CIP adsorption performance and mechanism. The results showed that the CIP-adsorbing ability first increased and then declined as the UTC pyrolysis temperature increased. The UTC obtained at 450℃ presented excellent CIP-absorbing ability at pH 6 and 40℃. The maximum monolayer adsorption capacity was 238.10 mg/g based on the Langrnuir isotherm model. The pseudo-second-order kinetic equation agreed well with the CIP adsorption process, which was controlled by both external boundary layer diffusion and intra-particle diffusion. The characterization analysis revealed that the - OH groups, G=C bonds of aromatic rings, C- H groups in aromatic tings and phenolic C - O bonds play vital roles in the CIP adsorption process, and that the N - C, N - O, O- C-O and C- OH groups of UTC were consumed in large quantities. π-π interactions, hydrogen bonding and electrostatic attraction are inferred as the main adsorption mechanisms. The present work provides not only a feasible and promising approach for UTLs utilization but also a potential adsorbent material for removing high concentrations of CIP from aqueous solutions.

Comparative Study of Various Organic Fertilizers Effect on Growth and Yield of Two Economically Important Crops, Potato and Pea

In the present experiment, the effect of various house hold wastes i.e. T1 (egg shell powder), T2 (wood ash), T3 (banana peel), T4 (used tea waste), T5 (egg shell tea) and T6 (control) used as organic fertilizers on growth and yield of two important vegetables i.e. potato and pea was investigated. Among all the treatments, the minimum average number of days to germination was observed in T3 in both potato and pea. The overall growth and development of potato and pea plants increased and the average plant height after 30, 60 and 90 days was greater in plants of treatment T1 (egg shell powder). In case of potato, the highest mean plant height (14.75 cm) was observed in treatment T1, followed by T3 and T4 (10.62 cm and 9.87 cm) respectively after 90 days of the emergence. T1 treatment increases the no. of leaves, no. of nodes, no. of branches and leaf area. Regarding tuber yield, the tubers were classified as large (>30 grams), medium (15 - 30 grams) and small (0.4 - 15 grams). T1 treatment produced greater average number of large size tubers (2.25) per plant, followed by T3 (1.25);however, the medium and small tubers followed comparable trends with differences among treatments. The average tuber yield (per potato plant) in treatment T1 was higher (113.78 g). In case of pea, T4 treatment (used tea waste) showed the highest mean plant height (82.25 cm). The treatment T1 (eggshell powder), T3 (banana peel) and T4 (used tea waste) showed positive effect on average pod yield (64.82 g, 66.67 g and 114.35 g) respectively. Number of grains per pod and pod size has been found higher in case of treatment T4. It has been concluded that among the different organic treatments, eggshell powder, banana peel and used tea waste were found best as organic fertilizer source for the two vegetables i.e. potato and pea.

乌龙茶降压降脂作用的临床观察

本文观察了福建乌龙茶降压降脂的作用,结果表明,降血压、降甘油三酯和降总胆醇的总有效率分别为78.56%、58.33%和50.00%。治疗后的收缩压、舒张压、甘油三酯和总胆固醇均明显下降,与治疗前对比,均呈显著或非常显著差异(P<0.05～0.001),并能较好地改善高血压病的临床症状,是一种既能降压,又有降脂,并可供长期饮用的饮料。

The effect of tea plantation age on soil water-stable aggregates and aggregate-associated carbohydrate in southwestern China

Soil carbohydrates constitute an important component of soil organic matter(SOM),and substantially contribute to the stabilization of soil aggregates.Here,we aimed to investigate the distribution of water-stable aggregates and carbohydrates within water-stable aggregates of soil in tea plantations located in Zhongfeng Township of Mingshan County,Sichuan,which is in southwest China.Samples were collected from tea plantations of different ages(18,25,33,and 55 years old)and an area of abandoned land was used as a control(CK).We also examined correlations between soil carbohydrates fractions and aggregate stability.The results showed that the mean weight diameter(MWD)of soil aggregates in the tea plan-tations was significantly higher than that the control.Furthermore,the soil aggregate stability was significantly enhanced in tea plantations,with the 25-year-old plantation showing the most pronounced effect.Soils in the plantations were also characterized by higher concentrated acid-extracted carbohy-drate content,and carbohydrate content in both surface and sub-surface layers were higher in the 25-year-old plantation.We also detected a significant positive correlation between the carbohydrate con-tent of soil and MWD after tea plantation(P<0.01).Notably,the association between dilute-acid extracted carbohydrate and the aggregate stability showed the highest correlation,indicating this car-bohydrate fraction could be used as an index to reflect changes in soil quality during tea plantation development.We should develop a potential fertilisation programme to maintain SOM-Carbohydrates within aggregates and the appropriate pH for preventing soil structure degradation after 25 years of tea planting.