| 1. | Forest is replaced by other vegetation types such as the forest steppe or steppe .
森林将被其它植被类型（例如森林草原或草原）所替代。 |
| 2. | So far as the north demarcation line of the forest zone is called the forest line , the north demarcation line of the forest - steppe zone should be called the tree line
相对于森林地带北界森林线，森林草原地带北界应为树木线。 |
| 3. | The species and genera of the vegetation cover mainly consisted of warm - dry plants whose main type is the alternation of the forest grassland or grassland
植物种属以温带干旱植物为主，植被类型多为森林草原及草原交替出现为主。 |
| 4. | Specifically , the southeast part of northwestern china should starts with forest and the middle part better with both forest and steppes while the west part can only be constructed as steppes
在东南部可以恢复森林，中西部可以恢复森林草原，西北部只能种草恢复草原。 |
| 5. | Vegetation construction should n ' t be confined to such a land use pattern as " the 28 - word general plan " put forward by zhu xianmo . the objective reality of thin woods and sparse shrubberies in the forest - steppe zone cannot be ignored
植被建造不应局限于一种土地利用模式，如朱显谟“ 28字方略” ，不能无视疏林及稀疏灌丛在森林草原地带的客观存在。 |
| 6. | Meanwhile , most aspects about this perspective are concerned , which include quantification of the soil water background of the plateau area , the regional spatial variation of soil water background and variation along the slope , mosaic structure and seasonal changes etc . the results show that : ( 1 ) for the fundamental circumstance for vegetation development is the original debilitated slope , so the perspective of soil water background specially for the loess plateau refers to the soil water conditions on the original slope . ( 2 ) the value of soil water background appears to be a descending trend from south to north based on the difference of vegetation zones . in the forest zone , soil moisture contents beneath 3m depth from the soil surface are more than 12 % usually ; in the forest - pasture zone , the values of soil moisture content beneath 4m depth underground are more than 6 % and stable , and tend to be ascending while the depth increases ; but the values in the dry pasture zone is lingering between 4 % to 6 % from the surface layer to sub - layers
发展了“土壤水分背景”的概念，并以之为基础对其各个方面进行了研究，使之形成一个相对独立和完整的体系，主要包括黄土高原土壤水分的背景值、土壤水分背景的区域分异、坡面分异、镶嵌结构及其季节分异等： ( 1 )由于植被生长发展、演替的基础阶段是天然草被群落，故认为黄土高原的土壤水分背景在概念上是特指该区天然草被群落下的土壤水分状况； ( 2 )黄土高原的土壤水分背景值，根据植被地带的不同表现出自南向北逐渐降低的规律：森林地带3米以下土层水分背景值普遍稳定地高于12 ，森林草原地带4米以下土层水分背景值稳定大于6 ，且均随土层的加深水分含量逐渐增加，而草原带的土壤水分背景值自土表至底土层一直在4 6之间徘徊。 |
| 7. | The north slope on the east part of qilian mountains was separated into 6 vertical distribution zones : alpine cold desert meadow 、 alpine meadow 、 alpine bush meadow 、 mountain forest grassland 、 mountain grassland 、 and mountain desert grassland , there are also some areas of alternative distribution
祁连山东部北坡根据气候、土壤、地貌等因素，分为6个垂直分布带：高山寒漠草甸带、高山草甸带、高山灌丛草甸带、山地森林草原带、山地草原带和山地荒漠草原带，有交替分布的地段。 |
| 8. | ( 5 ) since 3100 ab . r , through comprehensive analysis of these proxy climatic substitute indexes indicates : this was a dry and cold period in which the temperature fell the precipitation decreased ; the vegetation may be forest prairie ; human civilization further developed and the human " s influence on the environment was greater in intensity and wider in range
今，综合多气候代用指标和本期人类活动明显加强情况的分析表明：本期气候再次出现温度降低、降水量减少的变化，在趋于干冷气候条件下，在前期气候较适宜期发育的森林植被发生了退化，当时的植被可能为森林草原或干草原。 |
| 9. | The result of analysis shows that the climate of the period during which these strata were formed was mainly dry and cold , and the pollen of herbs is predominant . in the later part of this period the temperature and humidity increased a little , especially between the two cultural layers there was a short but clear section of wet and warm climate and a temperate forest steppe landscape existed
古环境分析表明，文化层出现前后的这一段时期，一直以干冷气候为主，草本花粉占绝对优势，中后期温湿度有所增加，尤其上下文化层之间曾有一个短暂而明显的较为温湿的时期，出现了温带森林草原景观。 |
| 10. | ( 3 ) 6000 - 5000ab . p , through comprehensive analysis of these proxy climatic substitute indexes indicates : this was a dry and cold period in which the temperature was the lowest and the precipitation was the least ; the vegetation may mainly be forest prairie ; in the early stage of the period appeared yangshao middle culture - the prosperous culture of miaodigou type , and in the late stage there was yangshao late culture - the culture of xiwang village type
P出现了老官台文化，中后期即本区老官台文化之后，出现了仰韶早期文化。门） 6000 5000ab p ，综合多气候代用指标的分析结果表明：本期气候为全新世以来温度最低、降水量最少的最干冷时期，在这种干冷气候条件下，在前期气候最适宜期发育的森林植被发生了退化，当时的植被可能以森林草原为主。 |
