Keerqin sand land is located in the transitional terrain between the Northeast Plain and Inner Mongolia （42°41′-45°15′N, 118°35′-123°30′ E） in Northeast China and it is seriously affected by ...Keerqin sand land is located in the transitional terrain between the Northeast Plain and Inner Mongolia （42°41′-45°15′N, 118°35′-123°30′ E） in Northeast China and it is seriously affected by desertification. According to the configuration and ecotope of the earths surface, the coverage of vegetation, occupation ratio of bare sandy land and the soil texture were selected as evaluation indexes by using the field investigation data. The evaluation index system of Keerqin sandy desertification was established by using Remote Sensing data. and the occupation ratio of bare sandy land was obtained by mixed spectrum model. This index system is validated by the field investioation data and results indicate that it is suitable for the desertification evaluation of Keerqin.Foundation Item： This study is supported by a grant from the National Natural Science Foundation of China （No. 30371192）展开更多
本文以内蒙古通辽市科尔沁左翼后旗巴胡塔镇乌旦塔拉村为试验区,选取13个土壤微形态指标,利用Photoshop、土壤切片图像处理分析系统、Image-pro plus 6.0软件对土壤微形态图像进行处理,采用定性、定量相结合的方法对不同改良处理后的砂...本文以内蒙古通辽市科尔沁左翼后旗巴胡塔镇乌旦塔拉村为试验区,选取13个土壤微形态指标,利用Photoshop、土壤切片图像处理分析系统、Image-pro plus 6.0软件对土壤微形态图像进行处理,采用定性、定量相结合的方法对不同改良处理后的砂质土壤肥力进行评价,在此基础上建立了砂质土壤肥力评价的微形态指标最小数据集(MDS)。得出以下结论:与对照组单元1相比,其他各个单元的土壤结构体、粗骨颗粒等微形态特征变化不显著。单元10(黏土、有机肥、腐殖酸施加量分别为3.00×10~5、3.00×10~4、7.50×10~3 kg/hm^2)中土壤黏粒最多、基质比最大、有机物质频率最高;土壤孔隙状况以及毛管孔隙发育最好的单元分别是单元8和单元13(黏土、有机肥、腐殖酸施加量分别是单元8:1.50×105、3.00×10~4、1.125×10~4 kg/hm^2,单元13:7.50×10~4、3.00×10~4、3.75×103 kg/hm^2)。准则层指标土壤基质、土壤孔隙、有机物质、土壤结构体、粗骨颗粒的权重分别为0.336、0.253、0.203、0.124、0.084。砂质土壤肥力评价的最小数据集包括基质比、基质类型、基质颜色、毛管孔隙占比、孔隙类型、有机物质类型、粗骨颗粒平均粒径7个指标,MDS评价结果与原始评价结果呈显著的线性相关关系,因此实际评价砂质土壤肥力时,可以MDS的7个微形态指标代替原始的13个指标。展开更多
The recent economic progress in China has stimulated scientific research in sandy lands in Inner Mongolia, where the Institute of Desert Research, Chinese Academy of Sciences （now CAREERI） has a leading position. Ec...The recent economic progress in China has stimulated scientific research in sandy lands in Inner Mongolia, where the Institute of Desert Research, Chinese Academy of Sciences （now CAREERI） has a leading position. Economic progress naturally creates financial resources for research, and also a dire need for solutions to emerging environmental problems following development, where wind-blown dust from Inner Mongolia adds to the severe particle air pollution in many Chinese cities. This paper presents selected results and observations made during Chinese-Swedish cooperation projects spanning 25 years. Results and experiences from sandy land research concerning climate, vegetation, root dynamics, soil carbon balances, etc. are briefly presented. The evolution of the Naiman Desertification Research Station, 520 km northeast of Beijing, from 1988 to 2013 is duly noted and commented. An overview of the ICBM soil carbon model concept follows and a few recommendations for future scientific advancement in Chinese arid lands are given.展开更多
为了研究施加黏土后的沙地土壤微形态特征,说明其改良效果,对内蒙古科尔沁沙地土壤切片进行观察,并利用土壤切片图像处理分析系统和Image-Pro Plus 6.0软件进行处理和分析,提取基质、孔隙和粗骨颗粒等和土壤肥力状况相关的定量化数据进...为了研究施加黏土后的沙地土壤微形态特征,说明其改良效果,对内蒙古科尔沁沙地土壤切片进行观察,并利用土壤切片图像处理分析系统和Image-Pro Plus 6.0软件进行处理和分析,提取基质、孔隙和粗骨颗粒等和土壤肥力状况相关的定量化数据进行分析及定性分析,结果表明:施加黏土后,出现了块状微结构和雏形团聚体;从基质比、毛管孔隙占比方面来说,底施处理效果更好,基质比在C2(3×10~5 kg/hm^2)处理水平比对照组提高了8.8%,毛管孔隙占比在C3(6×10~5kg/hm^2)处理水平提高了15%;就总孔隙百分比、粗骨颗粒磨圆度、粉粒百分比、粗骨颗粒平均粒径来说,表施处理效果比较好,C1(1.5×10~5 kg/hm^2)、C2(3×10~5 kg/hm^2)处理水平均有显著改善。结论:1)施加黏土后,沙地土壤结构与原始沙地的粒状微结构相比有一定的改善;2)短期底施处理下,C1和C2处理单元的基质比有所提高,毛管孔隙占比随着黏土施加量的增加而提高;粗骨颗粒特征方面,表施处理效果比底施效果要好;3)短期改良情况下,沙地土壤微结构并没有太大的变化,还是以粗骨颗粒为主,但改良后出现一些雏形团聚体,各量化指标均有不同程度的提高。展开更多
基金This study is supported by a grant from the National Natural Science Foundation of China （No. 30371192）
文摘Keerqin sand land is located in the transitional terrain between the Northeast Plain and Inner Mongolia （42°41′-45°15′N, 118°35′-123°30′ E） in Northeast China and it is seriously affected by desertification. According to the configuration and ecotope of the earths surface, the coverage of vegetation, occupation ratio of bare sandy land and the soil texture were selected as evaluation indexes by using the field investigation data. The evaluation index system of Keerqin sandy desertification was established by using Remote Sensing data. and the occupation ratio of bare sandy land was obtained by mixed spectrum model. This index system is validated by the field investioation data and results indicate that it is suitable for the desertification evaluation of Keerqin.Foundation Item： This study is supported by a grant from the National Natural Science Foundation of China （No. 30371192）
基金a Professorship for Senior International Scientists(Grant No.Y229D91001)the project"Vegetation Dynamics in Semiarid Rangeland in Naiman Banner,Inner Mongolia,"funded by the Swedish agency SAREC and IDRAS,Chinese Academy of Sciences
文摘The recent economic progress in China has stimulated scientific research in sandy lands in Inner Mongolia, where the Institute of Desert Research, Chinese Academy of Sciences （now CAREERI） has a leading position. Economic progress naturally creates financial resources for research, and also a dire need for solutions to emerging environmental problems following development, where wind-blown dust from Inner Mongolia adds to the severe particle air pollution in many Chinese cities. This paper presents selected results and observations made during Chinese-Swedish cooperation projects spanning 25 years. Results and experiences from sandy land research concerning climate, vegetation, root dynamics, soil carbon balances, etc. are briefly presented. The evolution of the Naiman Desertification Research Station, 520 km northeast of Beijing, from 1988 to 2013 is duly noted and commented. An overview of the ICBM soil carbon model concept follows and a few recommendations for future scientific advancement in Chinese arid lands are given.
