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福建黄壤分布面积仅次于红壤,而与灰棕壤约略相等,为福建三大土类之一。黄壤垂直分布的范围,比红壤与灰棕壤尤宽,从海拔数十米的丘陵到海拔千余米的高山,都有黄壤的存在。高山区的气候较湿凉,植物繁茂,黄壤承受微域气候的影响较大,低丘地区因排水不良,黄壤多由氧化铁水化而成,而主受微域地形的影响。大面积的黄壤多分布于高山构坡度较平缓的山顶或山坡。本文所研究的黄壤,乃属于这一类。福建北部的年雨量约在1,600毫米以上,平均温度在19℃以下,相对湿度
Fujian yellow soil distribution area is second only to red soil, and about the same as gray-brown soil, one of the three major soil types in Fujian. The range of yellow soil vertical distribution is wider than red soil and gray-brown soil. There are yellow soil from the hills of tens of meters above sea level to the mountains of 1000 meters above sea level. In the high mountainous area, the climate is wet and humid with luxuriant plants, and the yellow soil is more affected by the micro-climate. Due to the poor drainage in the hilly area, the yellow soil is mostly hydrated by the iron oxide, while the main area is affected by the micro-area topography. Large areas of yellow soil and more distributed in the mountain slope of the more gentle slope or hillside. The yellow soil studied in this article belong to this category. The annual rainfall in northern Fujian is about 1,600 millimeters or more, the average temperature below 19 ℃, relative humidity