烟叶

Therefore, several experiments were carried out to study their effect on the growth of tobacco seedlings and the activities of enzymes in soils. The main objects were to realize the mechanisms and reasons of continues cropping obstacles, to provide scientific information for solving the problems produced by continuous cropping, and to improved the yields and qualities of fire-cured tobacco in tobacco-growing areas of Southwest China.

本项研究以烤烟根系分泌物和根残体为材料，探索它们对幼苗生长和土壤酶活性的影响，旨在研究烤烟连作障碍发生的机理和可能的原因，为进一步解决我国西南主要烟区的连作障碍问题，提高烟叶的质量和产量提供科学依据。

Soil organic matter, total K, effective Cu, effective Mo, water soluble Cl and the ratio of Ca to Mg were the key soil factors influenced the quality of tobacco leaf in the tobacco-growing areas of Guangdong Province.

土壤中有机质、全钾、有效铜、有效钼、水溶性氯和钙镁比值是影响广东烟区烟叶质量的主要土壤因子。

Results Guangdong tobacco-growing areas were endowed with basic soil conditions for high-quality tobacco leaf production; available K and effective B were somewhat low and the ratio of Ca to Mg was high.

结果］广东烟区具备生产优质烟叶的基本土壤条件，多数土壤养分适宜，速效钾、有效硼含量偏低，钙镁比值较高。

Tobacco bacterial wilt is one of main diseases of tobacco in south China due toits wide occurrence and difficultly being controlled.

烟草青枯病是我国南方烟草产区一种主要病害，发生广，且难以控制，有些发病严重的地方被迫放弃种烟，青枯病已成为烟叶稳定持续发展的重要制约因素。

Thus APRI at the root extending stage was an efficient irrigation method for tobacco production with water saving and quality regulating under lower fertilization in this study.

本研究结果表明，低肥时在烤烟伸根期进行分根区交替灌溉是烟叶生产中一种较好的节水调质的烟田灌溉方式。

The effects of root-divided alternative irrigation on growth, physiological characteristics and yield of flue-cured tobacco were studied under artificial water control by FDR.

利用射频反射仪，在人工控水条件下研究了分根交替灌溉对烤烟生长发育、生理特性及烟叶产量和品质的影响。

Compared with conventional irrigation, APRI treatment during different growth stages of tobacco saved irrigation water by 10.6% under lower fertilization and 7.1% under higher fertilization, respectively.

与常规灌溉相比，不同生育期APRI处理低肥时平均节水10.6%，高肥时平均节水6.1%，低肥时烟叶WUE平均提高2.3%。

During the whole growing period of tobacco plant, the change of evapotranspiration showed a single–peak curve. The evapotranspiration and soil evaporation increased. as soil water content increased.Tobacco water consumption of tobacco was related to yield through a binomial function.

随土壤含水量增加，烤烟各生育时期的耗水量和棵间蒸发量增大，全生育期内烤烟的耗水量呈单峰曲线，耗水量与烟叶产量呈二次曲线关系。

Then he lay quiet for a little, and then, pulling out a stick of tobacco, begged me to cut him a quid.

接着，他躺下来，取出一条烟叶，要我切下一小块。

Spring rain is the grandmother of the lines and pin lamp; spring rain is the grandfather of tobacco wrapped in tobacco pouch; spring rain injury worry is the eyes and the hazy window.

春天的雨是老奶奶灯下的线和针；春天的雨是老爷爷烟袋里裹着的烟叶；春天的雨是眼中的愁伤和窗外的朦胧。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。