农林交错区土壤养分空间分异特征分析
利用土壤肥力化学实测分析手段及GIS空间分析方法探讨农林交错区特殊区位条件下耕地及林地土壤肥力空间分异特征,判定不同土地利用方式下的土壤肥力变化规律及特征,为土地管理及决策者提供相应参考。通过对穆陵市林地和农地各80个采样点两种土地利用类型下土壤样本有机质、全氮、有效磷、有效钾进行化学实测,对其在高程梯度和坡度梯度分异情况进行分析,利用球状模型进行克吕格模型构建进行空间推演。结果表明,在坡度梯度上,除有效磷以外,有机质、有效钾、全氮在12°和25°附近均出现高值;在高程梯度上表现在中等海拔400-500 m上出现高值高度较高和较低海拔高度上土壤肥力值有所降低;克吕格差值模型进一步说明林地的土壤...
Saved in:
Published in | 东北农业大学学报 Vol. 45; no. 8; pp. 27 - 33 |
---|---|
Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
东北农业大学资源与环境学院,哈尔滨,150030%中国科学院东北地理与农业生态研究所,长春,130012
2014
|
Subjects | |
Online Access | Get full text |
ISSN | 1005-9369 |
Cover
Summary: | 利用土壤肥力化学实测分析手段及GIS空间分析方法探讨农林交错区特殊区位条件下耕地及林地土壤肥力空间分异特征,判定不同土地利用方式下的土壤肥力变化规律及特征,为土地管理及决策者提供相应参考。通过对穆陵市林地和农地各80个采样点两种土地利用类型下土壤样本有机质、全氮、有效磷、有效钾进行化学实测,对其在高程梯度和坡度梯度分异情况进行分析,利用球状模型进行克吕格模型构建进行空间推演。结果表明,在坡度梯度上,除有效磷以外,有机质、有效钾、全氮在12°和25°附近均出现高值;在高程梯度上表现在中等海拔400-500 m上出现高值高度较高和较低海拔高度上土壤肥力值有所降低;克吕格差值模型进一步说明林地的土壤肥力在区位条件相同的前提下均高于耕地的土壤肥力,并呈现一定的空间分异性。农林交错区的坡地耕作导致土壤化学特征及基本土壤肥力水平下降。 |
---|---|
Bibliography: | 23-1391/S NING Jing, GUAN Zhixin, WEI Dan, ZHANG Shuwen, HANG Yanhong (1. School of Resources and Environmental Sciences, Northeast Agricultural University, Harbin 150030, China; 2. Northeast Institute of Geography and Agricultural Ecology, CAS, Changchun 130012, China) farm-forest ecotone;soil fertility;spatial variation;characteristics In order to find out the variation and characteristics of soil fertility under different land use patterns, this paper studied the soil fertility spatial variation features of farm-forest ecotone by the spacial analysis of GIS and the chemical analysis of soil fertility, to provide the appropriate references for land management and making decision. The soil organic matter, total nitrogen, available phosphorus and available potassium of 80 sampling points were tested, and the elevation gradient and slope gradient variation of soil fertility were analyzed, the Kriging mode was used for space inference. The results showed that the contents of organic matter and available potassium |
ISSN: | 1005-9369 |