邓县地处豫西南,是南阳烟区的主要产烟县,也是全国种烟面积最大的县份之一。常年种烟17万亩,约占南阳烟区种植面积的一半。二十年代发展起来的烤烟,具有色泽鲜、组织细、吃味纯和、香气浓郁的清香型特点。但在七十年代,由于采用了一些不合理的栽培措施,如栽植多叶品种,高密度、多留叶,忽视氮磷钾的合理配比等等,烟叶的质量明显下降,影响了产品声誉。为了提高烟叶质量,我们自1982年开始,在省烟叶优、稳、低协作组的直接指导和各级领导的支持下,开展了烟叶优质适产栽培技术研究。经过几年来的试验、示范,这 Deng County is located southwest of Henan Province, is the main tobacco producing county of Nanyang tobacco, but also one of the largest county in the country. Perennial tobacco planting 170000 acres, accounting for about half of the planting area of ​​Nanyang tobacco. Twenty developed tobacco, with fresh color, fine tissue, pure taste and flavor, aroma-rich characteristics of the fragrance. However, in the seventies, due to unreasonable cultivation measures, such as planting multi-leaf varieties, high density, leaving more leaves, ignoring the rational ratio of NPK and so on, the quality of tobacco decreased significantly, affecting the product reputation. In order to improve the quality of tobacco leaves, we started to carry out researches on high-quality and moderate-yield tobacco leaf cultivation techniques since 1982 with the direct guidance of provincial excellent, stable and low-level cooperation groups and the support from leaders at all levels. After several years of experimenting, demonstrating this