鄂西南植烟土壤养分状况分析

对鄂西南8个产烟县(市)进行了土壤取样调查分析。结果表明,鄂西南烟区14%的土壤存在酸化趋势;约50%土壤的有机质和86.5%土壤的碱解氮含量偏高;28%的土壤非常缺磷,63.5%的土壤缺钙;58.5%的土壤缺钾,其中20.1%的极度缺钾;89%的土壤缺镁;88.2%的土壤缺硼,其中54.4%的严重缺硼。因此,应采取相应措施调节酸碱度,严格控制氮肥用量,重视普钙(过磷酸钙)、钾肥、镁肥和硼肥的施用。该烟区79.1%的土壤不缺锌,因此,缺锌不是该烟区烟叶生产的主要障碍,但需要关注土壤有效锌含量的变化趋势。

Analysis on Soil Nutrients of Tobacco-growing Areas in Southwest Hubei

Soil samples from eight tobacco production areas in southwestern Hubei Province were analyzed.The results indicated that 14% of the soil experienced different levels of acidification.50% and 86.5% of the soils were found with relatively higher levels of organic matter and available nitrogen,respectively.63.5%,58.5%,89% and 88.2% of the soils were deficient in calcium,potassium,magnesium,and boron,respectively,including 28%,20.1%,and 55.4% of the soils extremely poor in phosphorus,potassium,and boron,respectively.Thus measures should be taken to control soil pH and nitrogen fertilizer rate,and calcium,potassium,magnesium and boron fertilizer should be applied.79.1% of the soils were not deficient in zinc,but we should pay attention to changes of soil zinc contents..