乌兰布和沙漠东北缘典型固沙林土壤养分特征研究  

Comparative Study on Soil Chemical Properties of Typical Sand-fixing Forests in Ulanbuh Desert

作　　者：黄雅茹[1,2] 郝玉光[1,2] 董礼隆 马迎宾[1,2] 辛智鸣[1,2] 徐军[1,2] HUANG Ya-ru1,2, HAO Yu-guang1,2,DONG Li-long1,2 ,MA Ying-bin1,2 ,XIN Zhi-ming1,2 ,XU Jun1,2(1. Experimental Center of Desert Forestry, CAF, Dengkou, Inner Mongolia 015200, China 2. Inner Mongolia Dengkou Desert Ecosystem Research Station, State Forestry Administration, Dengkou, Inner Mongolia 015200, Chin)

机构地区：[1]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200 [2]国家林业局内蒙古磴口荒漠生态系统定位研究站,内蒙古磴口015200

出　　处：《西北林学院学报》2018年第2期1-9,共9页Journal of Northwest Forestry University

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2017MB026)

摘　　要：在乌兰布和沙漠采用野外典型抽样调查和室内分析的方法,研究不同的固沙林土壤养分特征,并对土壤肥力进行综合评价。结果表明,有机质含量为(4.74±3.31)g·kg^(-1),全N、全K、全P分别为(0.28±0.16)g·kg^(-1)、(17.58±7.32)g·kg^(-1)、(0.37±0.12)g·kg^(-1),碱解N、速效K、速效P分别为(19.20±7.46)mg·kg^(-1)、(162.00±177.28)mg·kg^(-1)、(4.13±2.69)mg·kg^(-1),pH值为(8.63±0.38)。土壤有机质表现为二白杨林>沙棘林>新疆杨林>裸沙地。二白杨林全N含量最高,沙棘林的碱解N含量最高。全P含量、速效P含量表现为新疆杨林>二白杨林>沙棘林>裸沙地。新疆杨林土壤全K含量最高,二白杨林速效K含量最高。土壤有机质、土壤全N、碱解N、全P、速效P、全K、速效K随着土层深度的增加呈下降趋势。土壤各养分因子之间存在着不同程度的相关关系。3个典型林地pH值与其他各养分因子之间呈负相关关系,而其他各养分因子之间相互呈正相关关系。土壤肥力综合评价的排序为二白杨林(0.365)>新疆杨林(0.328)>沙棘林(0.295)>裸沙地(0.146)。With the method of representative investigation and laboratory analysis, the study on the effects of different sand-fixing forests on soil nutrient characters in Ulanbuh Desert was carried out, soil nutrient characteristics were evaluated. The contents of organic matter,total nitrogen, total potassium, total phosphorus in soil samples were （4. 74±3.31）, （0. 28±0.16）, （17. 58±7.32）, （0.37±0.12）g · kg-1 ,respectively. The contents of soil available nitrogen, available potassium, available phosphorus were （19. 20 ±7.46） ,（162. 00±177.28）,（4.13±2.69）mg · kg-1 ,respectively. The soil pH was （8. 63±0.38）. Soil organic matter was in the order of Populus gansuensis forest〉Hippophae rhamnoides forest〉P, alba var. pyramidalis forest〉bare sand. Soil total nitrogen in the highest was P. gansuensis forest, available nitrogen in the highest was H. rhamnoides forest. Total phosphorus and available phosphorus was P. alba var. pyrarnidalis forest〉 P. gansuensis forest〉H, rhamnoides forest〉bare sand. Soil total potassium in the highest was P. alba var. pyramidalis forest, available potassium in the highest was P. gansuensis forest. With the increase of soil depth,soil organic matter,total nitrogen,available nitrogen,total phosphorus,available phosphorus,total potassium, available potassium declined. The soil nutrient factors exhibited different degrees of correlation. Negative correlationship was found between soil pH of three typical forests and other factors. Positive correlationship was observed the nutrient factors. Based on a comprehensive evaluation of soil fertility,the sand-fixing forests were ranked from most to least fertile as follows： P. gansuensis forest （0. 365） 〉 P. alba var. pyramidalis forest （0. 328） 〉 H. rhamnoides forest （0. 295） 〉 bare sand （0. 146）.

关 键 词：土壤化学性质 固沙林 乌兰布和沙漠 

分 类 号：S714.3[农业科学—林学]