福建烟区土壤肥力状况

福建烟区 72 2个土壤样品的分析结果表明 ,土壤 p H平均为 5 .0 4.各成分的质量分数为 :有机质 2 8.93 g· kg- 1 、物理性粘粒 (<0 .0 1 mm) 3 3 %、全 N 1 .446g· kg- 1 、碱解 N 1 41 .9mg· kg- 1 、全 P 0 .482 g· kg- 1 、速效 P 2 0 .5 mg· kg- 1 、全 K2 0 .89g·kg- 1、速效 K1 2 2 mg·kg- 1、缓效 K2 94mg· kg- 1、交换性 Ca5 99.3 mg·kg- 1、交换性 Mg2 9.5 3 mg·kg- 1、有效S2 6.8mg·kg- 1、有效 Cu2 .1 1 mg·kg- 1、有效 B0 .2 42 mg·kg- 1、水溶性 Cl- 1 4.7mg·kg- 1 .烟区土壤 p H普遍偏低 ,应重视调节土壤酸度 ;注意适量施用 N肥 ;合理施用 P肥 ,减少土壤固定 ;重视施用 K肥 ;增加 Mg、B营养 ;施用石灰调节土壤酸度的同时应避免影响烤烟对 Mg、B的吸收

The status of soil fertility in Fujian tobacco-growing areas

The 722 soil samples from Fujian tobacco growing areas were analysed. The results were as follows: pH 5.04, organic matter 28.93 g·kg -1 , physical clay (<0.01 mm) 33%, total N 1.446 g·kg -1 , hydrolytic N 141.9 mg·kg -1 , total P 0.482 g·kg -1 , available P 20.5 mg·kg -1 , total K 20.89 g·kg -1 , available K 122 mg·kg -1 , slow releasing K 294 mg·kg -1 , exchangeable Ca 599.3 mg·kg -1 , exchangeable Mg 29.53 mg·kg -1 , available S 26.8 mg·kg -1 , available Cu 2.11 mg·kg -1 , available B 0.242 mg·kg -1 , water soluble Cl 14.7 mg·kg -1 . Because of low pH in a great majority of the soil in tobacco growing areas, adjustment of soil acidity, rational application of N and P, reduction of soil fixing, fertilization of K and increasing magnesium and boron should be well done. While lime is applied to adjust soil acidity, tobacco absorption of magnesium and boron should not be hindered.