黄土丘陵区土石山区,loess and bedrock area ecoton
1)loess and bedrock area ecoton黄土丘陵区土石山区
2)loess hilly-gully region黄土丘陵区
1.Planning method of ecological restoration based on enlarging terrace and de-farming in theloess hilly-gully region: A case study of Yangou Catchment;黄土丘陵区“梯田退耕”生态重建规划方法——以燕沟流域为例
2.Spatial different characteristics on relieving andde-farming for eco-environmental rehabilitationin theloess hilly-gully region;黄土丘陵区生态重建“赈济退耕”及地域分异特征
3.Effects of land use type on soil organic C and total N in a small watershed inloess hilly-gully region;黄土丘陵区小流域土地利用对土壤有机碳和全氮的影响
英文短句/例句
1.STUDY ON SOIL DEGENERATION OF RECLAIMED FOREST-LANDS IN LOESS HILLY FOREST REGION;黄土丘陵区林区开垦地土壤退化研究
2.Effect of Farmland Abandonment on Soil Enzyme Activities in Loess Hilly Region黄土丘陵区撂荒对土壤酶活性的影响
3.The Study of Land Reclamation Potential for Subsided Land of Coal Exploitation;黄土丘陵区采煤塌陷地复垦潜力研究
4.Study on Ecological Effect of Artificial Seabuckthorn Forest with Different Ages in Loess Hilly Region;黄土丘陵区人工沙棘林生态作用研究
5.Reflection on the Rural Economic Development in Loess Hilly Region in Yulin;榆林黄土丘陵区农村经济发展的思考
6.DEVELOPMENT OF GULLIES AND EVALUATION ON THEIR STABILITY IN THE LOESS HILL REGION;黄土丘陵区沟谷发育及其稳定性评价
7.Spatial and temporal relationships between land use and soil mois ture in hilly area of the Loess Plateau;黄土丘陵区土地利用与土壤水分的时空关系
8.Soil moisture characteristics of different vegetation measures in loess hilly region of southern Ningxia宁南黄土丘陵区不同植被措施的土壤水分特征
9.Study on grass and bush and tillage measures to conserve soil and water in loess region黄土丘陵区水土保持生物和耕作措施的研究
10.Soil Water Ecological Environment on the Man-made Woodland and Grassland in Loess Hilly Region黄土丘陵区人工林草地的土壤水分生态环境
11.Soil Condition of Herb and Shrub Stage of Vegetation Secondary Succession in the Hilly-Gullied Loess Region;黄土丘陵区植被次生演替草灌阶段的土壤条件
12.The Impacts of Conversion of Cropland to Forest and Grassland on Land Use in the Loess Hilly Area;退耕还林草对黄土丘陵区土地利用的影响
13.Land Use Change and Its Regulation of Yangou Watershed in Loess Hilly-gully Region;黄土丘陵区燕沟流域土地利用变化与优化调控
14.Analysis on environment economics of the soil erosion in hilly regions of loess plateau;黄土丘陵区水土流失的环境经济学分析
15.Experimental Study on Anti-Scourability of Soil with Biological Soil Crusts in Hilly Loess Plateau Region黄土丘陵区生物结皮土壤抗冲性试验研究
16.Selection on Suitable Trees in Semiarid Loess Hilly and Gully Area;半干旱黄土丘陵沟壑区适生树种选择
17.Study on the Gully Vegetation of Junger Loess Hill-Gully Region;准格尔黄土丘陵沟壑区沟谷植被研究
18.The study of landform classification in complicated terrain areas-Loess hill and gully area黄土丘陵沟壑区地形分类方法的研究
相关短句/例句
loess hilly-gully region黄土丘陵区
1.Planning method of ecological restoration based on enlarging terrace and de-farming in theloess hilly-gully region: A case study of Yangou Catchment;黄土丘陵区“梯田退耕”生态重建规划方法——以燕沟流域为例
2.Spatial different characteristics on relieving andde-farming for eco-environmental rehabilitationin theloess hilly-gully region;黄土丘陵区生态重建“赈济退耕”及地域分异特征
3.Effects of land use type on soil organic C and total N in a small watershed inloess hilly-gully region;黄土丘陵区小流域土地利用对土壤有机碳和全氮的影响
3)loess hilly region黄土丘陵区
1.Analysis on eco-economic process of small watershed comprehensive management inloess hilly region: A case study on Litaiping small watershed in Longde county of Ningxia;黄土丘陵区小流域综合治理生态经济过程分析——以宁夏隆德县李太平小流域为例
2.Experimental study on soil erosion dynamic mechanism of slope flow inloess hilly region;黄土丘陵区坡面薄层水流侵蚀动力机制实验研究
3.Water transfer simulation in SVAT system of farmland and forestland in theloess hilly region;黄土丘陵区农林地SVAT系统水分传输模拟研究
4)loess hilly area黄土丘陵区
1.Increase of land productivity and its implication for eco-environment improvement: a case study in Zhifanggou Catchment inloess hilly areas;纸坊沟流域黄土丘陵区土地生产力变化与生态环境改善
2.Dynamic changes of soil microbial biomass in the restoration process of shrub plantations inloess hilly area;黄土丘陵区人工灌木林恢复过程中的土壤微生物生物量演变
3.Evaluating Structure of Different Household Agro-ecosystems in Loess Hilly Area;黄土丘陵区不同类型家庭农业生态系统结构评价
5)the Loess Hilly Region黄土丘陵区
1.Assessment of agricultural ecological security of the Zhifanggou Valley inthe Loess Hilly Region over 70 years;黄土丘陵区纸坊沟流域近70年农业生态安全评价
2.Heterogeneity of soil nutrients of cropland returning to forest on the loess hilly region;黄土丘陵区退耕地土壤养分变异特征
3.Ecological-economic coupling process and sustainability for ecological rehabilitation of Xiannangou Catchment inthe Loess Hilly Region;黄土丘陵区县南沟流域生态恢复的生态经济耦合过程及可持续性分析
6)Hilly Loess Plateau黄土丘陵区
1.Quality assessment of erosion soil on hilly Loess Plateau;黄土丘陵区侵蚀土壤质量评价
2.The characteristics and evolution of soil nutrient in artificial black locust (Robinia pseudoacacia)forest land in the hilly Loess Plateau;黄土丘陵区刺槐人工林土壤养分特征及演变
3.Through field investigation and laboratory measurement of the development and growth condition of bryophytes crust in the revegetated grassland on the hilly Loess Plateau,we proposed a regression equation method for measuring bryophytes biomass.通过野外调查黄土丘陵区不同发育年限退耕地上藓结皮发育状况,结合室内测定,提出了藓类植物生物量测定的回归方程法。
延伸阅读
黄土黄土loess第四纪形成的陆相黄色粉砂质土状堆积物。黄土的粒径从＞0.005毫米～＜0.05毫米，其粒度成分百分比在不同地区和不同时代有所不同。它广泛分布于北半球中纬度干旱和半干旱地区。黄土的矿物成分有碎屑矿物、粘土矿物及自生矿物3类。碎屑矿物主要是石英、长石和云母，占碎屑矿物的80％，其次有辉石、角闪石、绿帘石、绿泥石、磁铁矿等；此外，黄土中碳酸盐矿物含量较多，主要是方解石。粘土矿物主要是伊利石、蒙脱石、高岭石、针铁矿、含水赤铁矿等。黄土的化学成分以SiO2占优势，其次为Al2O3、CaO，再次为Fe2O3、MgO、K2O、Na2O、FeO、ΤiO2和MnO等。黄土的物理性质表现为疏松、多孔隙，垂直节理发育，极易渗水，且有许多可溶性物质，很容易被流水侵蚀形成沟谷，也易造成沉陷和崩塌。黄土颗粒之间结合不紧，孔隙度一般在40％～50％。黄土是指原生黄土，即主要由风力作用形成的均一土体；黄土状沉积是指经过流水改造的次生黄土。中国北方新生代晚期土状堆积物中常见有古土壤分布，尤以黄土高原地区黄土中最为普遍。在黄土古土壤层下部的白色钙质淀积层常以结核形式表现出来。钙结核的形状有长柱状、不规则树枝状及圆球状等，一般长15～25厘米，宽5～10厘米。黄土在北半球各大陆均有分布，以中国北方的黄土最为典型，在黄河中游构成了著名的黄土高原。中国黄土的分布区介于北纬34°～45°之间，呈东西向带状分布，位于北半球中纬度沙漠-黄土带东南部。黄土分布还与东西向山脉的走向大体一致，昆仑山、秦岭、泰山一线以北黄土分布广泛。中国黄土的总面积为380840平方千米，黄土状沉积的总面积为254440平方千米。其中黄河流域黄土面积为317600平方千米。黄土的厚度各地不一，陕西泾河与洛河流域的中下游地区，最大厚度可达180～200米。中国黄土物质主要来自里海以东北纬35°～45°的内陆沙漠盆地地区。沙漠盆地中的上升气流将粉尘颗粒输送至高空，进入西风环流系统，随着西风带的高空气流自西向东、东南飘移，至东经100°以东的地区发生大规模沉降。堆积起来的粉尘颗粒，由于生物化学风化作用，发生次生碳酸盐化形成黄土。黄土是一种很肥沃的土层，对农业生产极为重要。但植被稀少，水土流失，给农业生产和工程建设都造成严重的危害，需要科学治理。
