【摘要】 <正> 黄壤是我国南方山区主要土壤类型之一,分布于亚热带和热带山地上,以四川、贵州两省为主,云南、广西、广东、福建、湖南、湖北、江西、浙江、安徽和台湾诸省(区)均有相当面积的分布。母质以花岗岩、砂岩为主,还有页岩、第四纪红色粘土、石灰岩和片岩等。黄壤的自然植被为常绿林和落叶林,目前大部份地区的森林植被已被破坏,为草本植被和农作物所代替。更多还原

【Abstract】 Yellow earth is one of the main soil great group in the mountainous area of south China.Thirty four soil profiles derived from granite, Quaternary red day, limestone, shale, schist and sandstone were analyzed. Total contents of B, Mo, Mn, Zn, Cu, Co, Ni, V, Cr, Ga, Pb and available B, Mo, Mn, Zn, Cu were determined. Conclusions are summarized as follows:1. The average contents of microelements in yellow earth are: total B 52 ppm, total Mo 1.53 ppm, total Mn 373 ppm, total Zn 81 ppm, total Cu 25 ppm, total Co 11 ppm, total Ni 24 ppm, total V 130 ppm, total Cr 57 ppm, total Ga 13 ppm, total Pb 30 ppm, available B 0.27 ppm, available Mo 0.04 ppm, available Zn 2.05 ppm, available Cu 0.59 ppm, active Mn 70 ppm.2. Yellow earths derived from Quaternary red day, limestone and shale are richer in microdements than those derived from granite, schist and sandstone.3. In comparison with the average contents of the soils in other countries, Zn and V in yellow earth of China are higher, Mn and Cr are lower, and the others are similar in content.4. The contents of microelements in yellow earth are equal to those in red earth.更多还原