川西北壤塘县沙化土地土壤化学性质变化研究  

A Study of Changes of Soil Chemical Properties of Sandy Land in Rangtang County in Northwest Sichuan

作　　者：游秋明 焦四明 高俊 刘凯[1] 王博[1] 蔡凡隆[1] 

机构地区：[1]四川省林业调查规划院,四川成都624000

出　　处：《四川林业科技》2017年第6期59-63,106,共6页Journal of Sichuan Forestry Science and Technology

摘　　要：采用空间序列代替时间序列的方法,研究了壤塘县对照地、露沙地、沙化耕地、固定沙地的土壤化学性质变化。结果发现:1)0~20 cm和20 cm^40 cm土层中,p H值均随沙化程度的加重逐步升高,而有机质、全N、水解N、全P含量则逐步降低;2)不同土层之间同种类型沙化土壤p H值差异不明显;除对照土壤水解N外,有机质、全N、水解N、全P含量均表现为0~20 cm土层等于(近似等于)或大于20 cm^40 cm土层的特点。3)各种沙化类型中,土壤上层和下层全K含量变化不大,速效K和有效P含量均表现出对照>沙化耕地>露沙地、固定沙地的特点。The chemical properties changes of soil were studied listed as follows：control land, sandy soil, sandy farmland and fixed sandy land in exposed Rangtang County, by the way of spatial sequence in- stead of the time series. The results showed that ： 1 ） Under 0 cm ~ 20 cm and 20 cm ~ 40 cm soil layer, the pH value increased with the increasing of desertification degree; organic matter, total N, the hydrolysis of N, and total P content gradually reduced ; 2） Among the same sandy land type of different soil layer, the pH values were not significantly different. Except hydrolysis N of the control soil, organic matter, total N and hydrolysis N, total P content in 0 cm ~ 20 cm soil layer were equal to （approximately equal to） or greater than that in 20 cm - 40 cm soil. 3 ） In different types of sandy soil, no significant change of total K content in the upper and lower soli were found, available K and P content showed as ： control land 〉 sandy farmland 〉 expose sandy soil and fixed sandy land.

关 键 词：川西北 沙化土地 土壤 化学性质 

分 类 号：S153[农业科学—土壤学]