知识与财富的链接
通过对三明烟区具有代表性的316个土壤样品的分析测定,结果表明:该烟区土壤pH平均为5.0;土壤养分的平均含量为:有机质27.0gkg-1、全氮1.4gkg-1、碱解氮142mgkg-1、全磷0.5gkg-1、速效磷24mgkg-1、全钾19.2gkg-1、缓效钾250mgkg-1、速效钾109mgkg-1、交换性钙726mgkg-1、交换性镁30mgkg-1、有效硫22mgkg-1、有效铁23.8mgkg-1、有效锰9.9mgkg-1、有效铜2.7mgkg-1、有效锌2.0mgkg-1、有效硼0.2mgkg-1、水溶性氯15.0mgkg-1。三明烟区土壤有机质含量普遍较高,pH偏低,全氮、碱解氮水平中等,适宜烤烟生长;部分土壤有效磷含量较高,应合理适量施用磷肥;速效钾普遍缺乏,应重视钾肥施用;土壤镁、硼营养明显不足,应增加镁,硼营养,在施用石灰调节土壤酸度的同时应避免影响烤烟对镁,硼的吸收;慎重施用氯肥。
A set of 316 soil samples from Sanming tobacco-growing areas were analysed. The results were as follows: pH 5.0, organic matter 27.0g kg~(-1), total N 1.4 g kg~(-1), hydrolytic N 142mg kg~(-1), total P 0.5 g kg~(-1), available P 24 mg kg~(-1),total K 19.2 g kg~(-1), available K 109mg kg~(-1), slow-releasing K 250mg kg~(-1), exchangeable Ca 726 mg kg~(-1), exchangeable Mg 30 mg kg~(-1), available S 22 mg kg~(-1), available Fe 23.8mg kg~(-1), available Mn 9.9mg kg~(-1), available Cu 2.7mg kg~(-1), available Zn 2.0mg kg~(-1), available B 0.2mg kg~(-1),and water soluble Cl 15.0 mg kg~(-1)were found. 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, and fertilization of K, magnesium,and boron should be well considered.
