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自七十年代以来河南烤烟品质严重下降,至今未恢复到历史最好水平。一般认为导致品质下降的原因很多,诸如品种不良、施肥失当、留叶过多、移栽过早等。这些因素除移栽期有争议外,认识是一致的。但对于那个是主导因素,则有不同的看法。有的认为是品种,有的认为是密度,也有的认为是移栽期。通过近年的广泛调查研究,我们认为导致河南烤烟品质下降的主导因素是施肥失当。即随着农作物产量提高,农田增施了大量氮素化肥,土壤养分发生了氮多、磷
Since the seventies a serious decline in Henan quality of flue-cured tobacco, has not yet returned to the best level in history. Generally believed that leading to the decline in quality for many reasons, such as poor varieties, improper fertilization, leaves too much, such as early transplanting. In addition to these factors are controversial transplanting period, the understanding is the same. But for that is the dominant factor, then have different views. Some think it is breed, others think it is density, while others think it is transplanted. Through extensive investigations and studies in recent years, we believe that the leading factor leading to the declining quality of Henan flue-cured tobacco is improper fertilization. That is, with the increase of crop yield, a large amount of nitrogen fertilizer is applied to farmland, nitrogen and phosphorus