弥渡县植烟土壤养分丰缺状况评价

为掌握大理州弥渡县植烟土壤养分状况,采用GPS定位技术在全县8个乡镇采集116个样品进行分析测定。结果表明:(1)弥渡县植烟土壤酸碱度多呈微酸性及中性,占79.31%。(2)有机质质量分数处于适宜偏高的水平,但仍有7.76%的植烟土壤有机质质量分数低于适宜质量分数标准。(3)土壤碱解氮、速效磷、速效钾质量分数总体上处于中等水平。(4)土壤有效硼、有效钼质量分数偏低的土壤分别占到45.69%和64.66%,各乡镇均有分布。(5)土壤水溶性氯质量分数在适宜水平的仅占15.52%,其中质量分数偏低的比例达59.48%,质量分数偏高比例占25.00%。可见,弥渡县植烟土壤有效硼、有效钼普遍缺乏,水溶性氯的适宜比例极低。

Evaluation of Soil Nutrients of Tobacco-growing Areas in Midu County

In order to evaluate the main nutrients of tobacco-growing areas in Midu County, 116 soil samples of 8 townships collecting with GPS were analyzed. The results showed that: (1) Soil reaction in study area was mainly weak acid and neutrality with the ratio of 79.31%. (2) The average contents of soil organic matter (OM) were high level, however, about 7.76% of soil OM content were lower than the suitable level. (3) The contents of soil available nitrogen (AN), available phosphorus (AP) and available potassium (AK) were generally medium level. (4) The proportion of soil available boron and available molybdenum, which were lower than suitable level, were 45.69% and 64.66%, respectively. Each township had their distribution. (5) The proportion of suitable content level for soil water soluble chlorine was only 15.52%, the proportion of lower content and higher content was 59.48% and 25.00%, respectively. Soil available boron and available molybdenum were generally lack and the suitable proportion of soil water soluble chlorine was extremely low.