Pub Date : 2011-01-01DOI: 10.3724/sp.j.1148.2011.00040
Li Li-ping
After carrying out the survey of 122 plots at 11 locations in the Altay Mountains (Altay),Kunlun Mountains (KL in abbreviation,the same below),and northern and southern slopes of the Tianshan Mountains (NT and ST respectively) in Xinjiang,it is found that the plant species richness of coniferous forests in Altay is significantly higher than that in ST and KL; plant species richness of Picea schrenkiana forests is significantly lower than that of P. obovata forests. According to the Sorensen Index,the plant composition in ST and KL is similar,and it is also similar in Altay and NT; the plant composition in Larix sibirica forests and Picea obovata forests are similar,but that in Juniperus centrasiatica and J. jarkendensis forests is quite different from that in Pinus sibirica and Abies sibirica forests,L. sibirica forests and Picea obovata forests. Species richness decreases significantly with the increase of altitude and mean annual temperature (MAT) but increases significantly with the increase of latitudes in whole Xinjiang. Species richness decreases with the increase of total basal area (TBA) in Altay and KL. According to the GLM (General Linear Model),aspect of plots (ASP) affects significantly the plant species richness in whole Xinjiang. Forest type and TBA also affects significantly the plant species richness in north Xinjiang. While in south Xinjiang,the plant species richness is significantly affected by annual precipitation (AP),slope position (POS) and TBA.
通过对新疆阿勒泰、昆仑山(简称KL，下同)和天山南北坡(分别为NT和ST) 11个地点122个样地的调查，发现阿勒泰针叶林的植物物种丰富度显著高于ST和KL;雪山云杉林的植物物种丰富度显著低于倒卵云杉林。根据Sorensen指数，ST和KL的植物组成相似，altai和NT也相似;西伯利亚落叶松林和黄云杉林的植物组成相似，而刺柏林和刺槐林与西伯利亚松林和西伯利亚冷杉林的植物组成差异较大。西伯利亚森林和云杉森林。物种丰富度随海拔和年平均温度的增加而显著降低，但随纬度的增加而显著增加。物种丰富度随总基底面积(TBA)的增加而降低，根据GLM (General Linear Model)，样地坡向(ASP)对整个新疆的植物物种丰富度有显著影响。森林类型和TBA对北疆植物物种丰富度也有显著影响。南疆植物物种丰富度受年降水量(AP)、坡位(POS)和TBA的显著影响。
{"title":"Study on Plant Species Composition and Richness of the Mountain Coniferous Forests in Xinjiang","authors":"Li Li-ping","doi":"10.3724/sp.j.1148.2011.00040","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2011.00040","url":null,"abstract":"After carrying out the survey of 122 plots at 11 locations in the Altay Mountains (Altay),Kunlun Mountains (KL in abbreviation,the same below),and northern and southern slopes of the Tianshan Mountains (NT and ST respectively) in Xinjiang,it is found that the plant species richness of coniferous forests in Altay is significantly higher than that in ST and KL; plant species richness of Picea schrenkiana forests is significantly lower than that of P. obovata forests. According to the Sorensen Index,the plant composition in ST and KL is similar,and it is also similar in Altay and NT; the plant composition in Larix sibirica forests and Picea obovata forests are similar,but that in Juniperus centrasiatica and J. jarkendensis forests is quite different from that in Pinus sibirica and Abies sibirica forests,L. sibirica forests and Picea obovata forests. Species richness decreases significantly with the increase of altitude and mean annual temperature (MAT) but increases significantly with the increase of latitudes in whole Xinjiang. Species richness decreases with the increase of total basal area (TBA) in Altay and KL. According to the GLM (General Linear Model),aspect of plots (ASP) affects significantly the plant species richness in whole Xinjiang. Forest type and TBA also affects significantly the plant species richness in north Xinjiang. While in south Xinjiang,the plant species richness is significantly affected by annual precipitation (AP),slope position (POS) and TBA.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69830632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-01-01DOI: 10.3724/sp.j.1148.2011.00085
Gao Yuan
In this paper,the data of soil moisture content in the middle reaches of the Yellow River during the period of 1981-2002 were analyzed to find the horizontal and vertical distribution laws. Characteristics of interannual and inter-decadal change of soil moisture content were also analyzed. The results reveal that,horizontally,soil moisture content was approximately higher in the central part than that in the southwestern and southeastern parts of the study area. Vertical distribution of soil moisture content changed seasonally. Soil moisture content was sharply decreased from early spring to May,especially in topsoil,the time when soil became the driest was earlier for 3 ten-day periods than that in soil layer of 50-100 cm,and the upper soil layer was drier than the lower one. Moisture content in topsoil was sharply increased in rainy season,and it was higher than that in lower layer. Holistically,soil moisture content was in a decrease trend,and there was a 5-6-year periodic change in the study area during the period of 1981-1996. There was an abrupt change of soil moisture content around 1991 in the central-southern part. Soil moisture content and its interannual change extent were high before 1991,and then soil became drier and the interannual change extent was lower. The change of soil moisture content was the most remarkable in the central-southern part of the study area.
{"title":"Analysis on Soil Moisture Content in the Middle Reaches of the Yellow River","authors":"Gao Yuan","doi":"10.3724/sp.j.1148.2011.00085","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2011.00085","url":null,"abstract":"In this paper,the data of soil moisture content in the middle reaches of the Yellow River during the period of 1981-2002 were analyzed to find the horizontal and vertical distribution laws. Characteristics of interannual and inter-decadal change of soil moisture content were also analyzed. The results reveal that,horizontally,soil moisture content was approximately higher in the central part than that in the southwestern and southeastern parts of the study area. Vertical distribution of soil moisture content changed seasonally. Soil moisture content was sharply decreased from early spring to May,especially in topsoil,the time when soil became the driest was earlier for 3 ten-day periods than that in soil layer of 50-100 cm,and the upper soil layer was drier than the lower one. Moisture content in topsoil was sharply increased in rainy season,and it was higher than that in lower layer. Holistically,soil moisture content was in a decrease trend,and there was a 5-6-year periodic change in the study area during the period of 1981-1996. There was an abrupt change of soil moisture content around 1991 in the central-southern part. Soil moisture content and its interannual change extent were high before 1991,and then soil became drier and the interannual change extent was lower. The change of soil moisture content was the most remarkable in the central-southern part of the study area.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69830705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-01-01DOI: 10.3724/sp.j.1148.2011.00126
W. Lei
In this paper,the osmotic regulation characteristics of 4 types of Armeniaca vulgaris seedlings under 80-day drought stress were studied. Drought stress treatment was applied to test the osmotic regulation characteristics of biennial seedlings of Armeniaca vulgaris f. aurantica L.,Wang et D. F. Cui and Armeniaca vulgaris f. glyeyosma L.,Wang et D. F. Cui,and the relative soil moisture content at depth of 15-20 cm,relative water content in leaves of A. vulgaris and the contents of Na+,K+,soluble protein,soluble sugar and proline were measured every 20 days. The results show that the relative soil moisture content at depth of 15-20 cm was decreased to slight drought stress (54%) after the seedlings were irrigated for 20 days,the relative water content in leaves was maintained higher than 80% except that in leaves of sweet kernel No.2. Under slight drought stress,K+ accumulation occurred in leaves of most wild apricots. Na+ accumulation occurred in leaves of all four types of wild apricot seedlings when the relative soil moisture content was decreased to the severe drought stress (47%-18%) after the seedlings were irrigated for 40-80 days. Soluble protein was relatively sensitive to drought stress,it was accumulated under slight to moderate drought stress,and such accumulation was possibly related to the drought-resistant capability of seedlings. Soluble sugar was also accumulated when drought stress was severer. Proline content was sharply increased under severe drought stress after the seedlings were irrigated for 60 days,but it was too low to contribute to osmotic regulation under hyperosmotic conditions,which suggests that the Proline accumulation is a symptom that the cells were injured under such drought stress.
对4种亚美尼亚幼苗在80 d干旱胁迫下的渗透调节特性进行了研究。采用干旱胁迫处理，测定了二年生栽培亚美尼亚(Armeniaca vulgaris f. aururantica L.，Wang et d.f. Cui)和二年生栽培亚美尼亚(Armeniaca vulgaris f. glyeyosma L.，Wang et d.f. Cui)幼苗的渗透调节特性，每隔20 d测定15 ~ 20 cm土壤相对含水量、叶片相对含水量以及Na+、K+、可溶性蛋白、可溶性糖和脯氨酸含量。结果表明:幼苗灌溉20 d后，15 ~ 20 cm土壤相对含水量下降至轻度干旱胁迫(54%)，叶片相对含水量除甜仁2号叶片外保持在80%以上;在轻度干旱胁迫下，大部分野杏叶片均发生K+积累。灌溉40 ~ 80 d后，土壤相对含水量降至严重干旱胁迫(47% ~ 18%)时，4种野生杏幼苗叶片均出现Na+积累。可溶性蛋白对干旱胁迫相对敏感，在轻度至中度干旱胁迫下积累，这种积累可能与幼苗的抗旱能力有关。干旱胁迫严重时可溶性糖也有积累。在严重干旱胁迫下，灌水60 d后脯氨酸含量急剧增加，但在高渗条件下，脯氨酸含量过低，无法参与渗透调节，说明脯氨酸积累是细胞在干旱胁迫下受到伤害的症状。
{"title":"Osmolyte Accumulation of Armeniaca vulgaris under Continuous Drought Stress","authors":"W. Lei","doi":"10.3724/sp.j.1148.2011.00126","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2011.00126","url":null,"abstract":"In this paper,the osmotic regulation characteristics of 4 types of Armeniaca vulgaris seedlings under 80-day drought stress were studied. Drought stress treatment was applied to test the osmotic regulation characteristics of biennial seedlings of Armeniaca vulgaris f. aurantica L.,Wang et D. F. Cui and Armeniaca vulgaris f. glyeyosma L.,Wang et D. F. Cui,and the relative soil moisture content at depth of 15-20 cm,relative water content in leaves of A. vulgaris and the contents of Na+,K+,soluble protein,soluble sugar and proline were measured every 20 days. The results show that the relative soil moisture content at depth of 15-20 cm was decreased to slight drought stress (54%) after the seedlings were irrigated for 20 days,the relative water content in leaves was maintained higher than 80% except that in leaves of sweet kernel No.2. Under slight drought stress,K+ accumulation occurred in leaves of most wild apricots. Na+ accumulation occurred in leaves of all four types of wild apricot seedlings when the relative soil moisture content was decreased to the severe drought stress (47%-18%) after the seedlings were irrigated for 40-80 days. Soluble protein was relatively sensitive to drought stress,it was accumulated under slight to moderate drought stress,and such accumulation was possibly related to the drought-resistant capability of seedlings. Soluble sugar was also accumulated when drought stress was severer. Proline content was sharply increased under severe drought stress after the seedlings were irrigated for 60 days,but it was too low to contribute to osmotic regulation under hyperosmotic conditions,which suggests that the Proline accumulation is a symptom that the cells were injured under such drought stress.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69831103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-01-01DOI: 10.3724/sp.j.1148.2011.00074
Hao Peng
In order to find the leaking laws of seasonal Dagu River in Shandong Province,some typical test sited were established in the upper and middle reaches of the Dagu River,and the field infiltration experiments were conduced based on the theory of water movement in vadose zone. Capacities of infiltration in riverbed in different vadose zones were studied. The results show that the infiltration process in the dry riverbed could be divided into two stages,i.e. the unstable infiltration and stable infiltration; the infiltration in the riverbed was affected by the hydraulic properties of vadose zone,and the infiltration rate in the upper reaches was higher than that in the middle reaches. The stable infiltration rates in the upper and middle reaches were 0.028 and 0.023 cm/s respectively. The process of unstable infiltration varied in a range of 1.5-2.0 hours,the proportion of infiltration was low in the total leakage,and it was gradually decreased with the time. Therefore,it is feasible to calculate the total leakage by using the stable infiltration rate in riverbed in flood season.
{"title":"Field Experimental Study on Infiltration in Seasonal River Channels","authors":"Hao Peng","doi":"10.3724/sp.j.1148.2011.00074","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2011.00074","url":null,"abstract":"In order to find the leaking laws of seasonal Dagu River in Shandong Province,some typical test sited were established in the upper and middle reaches of the Dagu River,and the field infiltration experiments were conduced based on the theory of water movement in vadose zone. Capacities of infiltration in riverbed in different vadose zones were studied. The results show that the infiltration process in the dry riverbed could be divided into two stages,i.e. the unstable infiltration and stable infiltration; the infiltration in the riverbed was affected by the hydraulic properties of vadose zone,and the infiltration rate in the upper reaches was higher than that in the middle reaches. The stable infiltration rates in the upper and middle reaches were 0.028 and 0.023 cm/s respectively. The process of unstable infiltration varied in a range of 1.5-2.0 hours,the proportion of infiltration was low in the total leakage,and it was gradually decreased with the time. Therefore,it is feasible to calculate the total leakage by using the stable infiltration rate in riverbed in flood season.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69830909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-01-01DOI: 10.3724/sp.j.1148.2011.00151
Hui Ying
In this paper,the spatiotemporal change of annual extreme precipitation events is analyzed using the daily precipitation data observed by 78 meteorological stations in Shaanxi Province during the period 1961-2009. The results show that the threshold of extreme intensity precipitation varied in a range of 18.7-9.5 mm/d,and it decreased northward. The extreme precipitation events in the province occurred mainly in rainy season from May to September,especially during the period from July to September,their duration was mostly for one day,the extreme precipitation events with 2-day duration occurred mainly in the central-southern part of south Shaanxi Province,and those with 3-day duration were occasional. The change trend of annual extreme precipitation events in the province was not significant in recent 49 years,but the extreme precipitation events increased in summer. The EOF results reveal that there were 2 main spatial distribution patterns of frequency of extreme precipitation events in the province. The first one (EOF1) was that the high or low frequency of extreme precipitation events was accordant in whole province,and there were 22-year and quasi-8-year periodic changes. The second one (EOF2) was that the frequency of extreme precipitation events in the southeastern part was opposite to that in the northwestern part,and there were the 12-14-year and 2-3-year periodic changes.
{"title":"Spatiotemporal Evolution of Extreme Precipitation Events in Shaanxi Province during the Period 1961-2007","authors":"Hui Ying","doi":"10.3724/sp.j.1148.2011.00151","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2011.00151","url":null,"abstract":"In this paper,the spatiotemporal change of annual extreme precipitation events is analyzed using the daily precipitation data observed by 78 meteorological stations in Shaanxi Province during the period 1961-2009. The results show that the threshold of extreme intensity precipitation varied in a range of 18.7-9.5 mm/d,and it decreased northward. The extreme precipitation events in the province occurred mainly in rainy season from May to September,especially during the period from July to September,their duration was mostly for one day,the extreme precipitation events with 2-day duration occurred mainly in the central-southern part of south Shaanxi Province,and those with 3-day duration were occasional. The change trend of annual extreme precipitation events in the province was not significant in recent 49 years,but the extreme precipitation events increased in summer. The EOF results reveal that there were 2 main spatial distribution patterns of frequency of extreme precipitation events in the province. The first one (EOF1) was that the high or low frequency of extreme precipitation events was accordant in whole province,and there were 22-year and quasi-8-year periodic changes. The second one (EOF2) was that the frequency of extreme precipitation events in the southeastern part was opposite to that in the northwestern part,and there were the 12-14-year and 2-3-year periodic changes.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69831133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-01-01DOI: 10.3724/sp.j.1148.2011.00047
Li Li-ping
Growth of trees includes two dimensions,i.e. diameter and height. The height-diameter relationship is affected by climatic and topographic conditions as well as species properties. In this paper,the relationship between stem diameter at breast height (DBH) and stem height (H) of coniferous forests is analyzed based on 120 sample plots investigated from 11 locations in the Altay Mountains (Altay),Kunlun Mountains (KL in abbreviation,the same below),and northern and southern slopes of the Tianshan Mountains (NT and ST respectively) in Xinjiang. The potential heights (H*) of trees in each plot were estimated. The results show that the taper of coniferous forests in KL,calculated with DBH/H,is higher than that in other regions,and the potential height in KL is lower than that in Altay and NT. For different forests,the taper of Pinus sibirica,Abies sibirica and Picea obovata forests is lower than that of Larix sibirica and Juniperus forests. The taper of Picea schrenkiana forests is lower than that of Juniperus forests but higher than that of Picea obovata forests. The H* of Juniperus forests is lower than that of other forests. Taper increases with the increase of altitude but decreases with the increase of AP in whole Xinjiang. For different regions,taper increases but H* decreases with the increase of altitude in Altay and NT,but there is no notable change of taper and H* with the increase of altitude in ST and KL. For different forests,the taper and H* of L. sibirica and Picea schrenkiana forests increase and decrease significantly with the increase of altitude separately. The taper of Pinus sibirica and A. sibirica forests increases significantly with the increase of altitude. According to the GLM (General Linear Model) analysis,change of the height-diameter relationship with environmental factors is different from different regions and scales. Annual precipitation (AP),aspect of sample plots (ASP) and forest type are the most important variables to taper and H* in whole Xinjiang. ASP,slope position (POS) and mean annual temperature (MAT) are important in north Xinjiang,and ASP,AP and MAT are important in south Xinjiang.
树木的生长包括两个维度，即:直径和高度。高径关系受气候、地形条件和物种特性的影响。本文以新疆阿勒泰、昆仑山(简称KL，下同)和天山南北坡(分别为NT和ST) 11个地点120个样地为研究对象，分析了针叶林胸径(DBH)与茎高(H)的关系。估算各样地树木的潜在高度(H*)。结果表明:以胸径/高(DBH/H)计算，KL针叶林的锥度高于其他地区，潜在高度低于阿尔泰和NT地区，不同林分，西伯利亚松林、西伯利亚冷杉林和黄云杉林的锥度低于西伯利亚落叶松林和刺柏林。雪山云杉林的锥度低于杜松林，但高于倒蛋云杉林。刺柏林的H*值低于其他林种。在整个新疆，随着海拔的升高，锥度增大，但随着AP的增加，锥度减小。在不同区域，随着海拔的升高，阿尔泰和NT的锥度增大，H*减小，而ST和KL的锥度和H*随海拔的升高变化不显著。在不同森林中，西伯利亚松林和雪山云杉林的锥度和H*分别随海拔的升高而显著增大和显著减小。随着海拔的升高，西伯利亚松林和西伯利亚针叶林的锥度显著增加。根据GLM (General Linear Model)分析，不同区域、不同尺度的高径关系随环境因子的变化是不同的。年降水量(AP)、样地坡向(ASP)和森林类型是影响整个新疆地区植被锥度和H*的最重要变量。ASP、坡位(POS)和年平均温度(MAT)在北疆重要，ASP、AP和MAT在南疆重要。
{"title":"Study on Relationship between Height and DBH of Mountain Coniferous Forests in Xinjiang","authors":"Li Li-ping","doi":"10.3724/sp.j.1148.2011.00047","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2011.00047","url":null,"abstract":"Growth of trees includes two dimensions,i.e. diameter and height. The height-diameter relationship is affected by climatic and topographic conditions as well as species properties. In this paper,the relationship between stem diameter at breast height (DBH) and stem height (H) of coniferous forests is analyzed based on 120 sample plots investigated from 11 locations in the Altay Mountains (Altay),Kunlun Mountains (KL in abbreviation,the same below),and northern and southern slopes of the Tianshan Mountains (NT and ST respectively) in Xinjiang. The potential heights (H*) of trees in each plot were estimated. The results show that the taper of coniferous forests in KL,calculated with DBH/H,is higher than that in other regions,and the potential height in KL is lower than that in Altay and NT. For different forests,the taper of Pinus sibirica,Abies sibirica and Picea obovata forests is lower than that of Larix sibirica and Juniperus forests. The taper of Picea schrenkiana forests is lower than that of Juniperus forests but higher than that of Picea obovata forests. The H* of Juniperus forests is lower than that of other forests. Taper increases with the increase of altitude but decreases with the increase of AP in whole Xinjiang. For different regions,taper increases but H* decreases with the increase of altitude in Altay and NT,but there is no notable change of taper and H* with the increase of altitude in ST and KL. For different forests,the taper and H* of L. sibirica and Picea schrenkiana forests increase and decrease significantly with the increase of altitude separately. The taper of Pinus sibirica and A. sibirica forests increases significantly with the increase of altitude. According to the GLM (General Linear Model) analysis,change of the height-diameter relationship with environmental factors is different from different regions and scales. Annual precipitation (AP),aspect of sample plots (ASP) and forest type are the most important variables to taper and H* in whole Xinjiang. ASP,slope position (POS) and mean annual temperature (MAT) are important in north Xinjiang,and ASP,AP and MAT are important in south Xinjiang.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69830779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-01-01DOI: 10.3724/sp.j.1148.2011.00001
Tang Zhi-yao
There are 3 637 wild vascular plants,425 birds and 154 mammals in Xinjiang. In this study,a database of the distribution of all the plants,birds and mammals in Xinjiang was compiled,the distribution maps of the species richness of plants and animals were charted,the relations between these species were analyzed,and distribution hotspots of the species richness were obtained. The results revealed that the species richness in the northern and western parts of Xinjiang was higher than that in the southern and eastern parts. There were positive correlations of the richness among the vascular plants,halophytes,ephemeral plants,endemic plants and key protective plants,and there were also positive correlation between the richness of vascular plants and that of birds and mammals. Hotspots of different taxonomic groups were incongruent. Hotspots of vascular plants were distributed in the western part of the Altay Mountains,the western and central parts of the Tianshan Mountains,and the mountains in the west Junggar Basin; those of birds extended as far as the east Tianshan Mountains and the southern slope of the west Tianshan Mountains; and those of mammals were distributed only in the Altay Mountains and the west Tianshan Mountains. Altogether only 8.9% of the hotspots were shared by all the three groups. Current nature reserve networks cover the most of these hotspots. However,the Shawan-Manas region is an important conservation gap for biodiversity in Xinjiang.
{"title":"Distribution Patterns of the Species Richness of Plants and Animals in Xinjiang,China","authors":"Tang Zhi-yao","doi":"10.3724/sp.j.1148.2011.00001","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2011.00001","url":null,"abstract":"There are 3 637 wild vascular plants,425 birds and 154 mammals in Xinjiang. In this study,a database of the distribution of all the plants,birds and mammals in Xinjiang was compiled,the distribution maps of the species richness of plants and animals were charted,the relations between these species were analyzed,and distribution hotspots of the species richness were obtained. The results revealed that the species richness in the northern and western parts of Xinjiang was higher than that in the southern and eastern parts. There were positive correlations of the richness among the vascular plants,halophytes,ephemeral plants,endemic plants and key protective plants,and there were also positive correlation between the richness of vascular plants and that of birds and mammals. Hotspots of different taxonomic groups were incongruent. Hotspots of vascular plants were distributed in the western part of the Altay Mountains,the western and central parts of the Tianshan Mountains,and the mountains in the west Junggar Basin; those of birds extended as far as the east Tianshan Mountains and the southern slope of the west Tianshan Mountains; and those of mammals were distributed only in the Altay Mountains and the west Tianshan Mountains. Altogether only 8.9% of the hotspots were shared by all the three groups. Current nature reserve networks cover the most of these hotspots. However,the Shawan-Manas region is an important conservation gap for biodiversity in Xinjiang.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69830209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-05DOI: 10.3724/SP.J.1148.2009.00804
Xin-biao Liu, Bin Zhou, Yu Wei
{"title":"Analysis on Groundwater Based on Environmental Isotopes in the Longdong Basin: Analysis on Groundwater Based on Environmental Isotopes in the Longdong Basin","authors":"Xin-biao Liu, Bin Zhou, Yu Wei","doi":"10.3724/SP.J.1148.2009.00804","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00804","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"804-810"},"PeriodicalIF":0.0,"publicationDate":"2010-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69826152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-05DOI: 10.3724/SP.J.1148.2009.00811
Bo-lang Chen, Jian-dong Sheng, Pingan Jiang, Yong-gang Liu
{"title":"Effects of Phosphorus Application on Phosphorus Adsorption and Desorption of Cotton Field Soil at Different Growing Stages: Effects of Phosphorus Application on Phosphorus Adsorption and Desorption of Cotton Field Soil at Different Growing Stages","authors":"Bo-lang Chen, Jian-dong Sheng, Pingan Jiang, Yong-gang Liu","doi":"10.3724/SP.J.1148.2009.00811","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00811","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"811-818"},"PeriodicalIF":0.0,"publicationDate":"2010-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69826218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-05DOI: 10.3724/SP.J.1148.2009.00840
Chen Lin, W. Lei, Zhang Qing-xia, Song Nai-ping
In this paper,the grey correlation analysis is used to analyze the vertical and monthly dynamic change of soil moisture content under 4 land use types in a wind-blown sand area in Yanchi County,Ningxia Hui Autonomous Region of China.The results show that the vertical change of soil moisture content under different land use types are quite different,the similarity of soil moisture content in the middle layer(30～70 cm in depth) and the deeper layer(70～100 cm) is high,with an order of Caragana korshinskii land natural grassland Glycyrrhiza sp.land Medicago sativa land.The grey correlation degree of soil moisture content between the top layer(0～30 cm in depth) and the deeper layer(70～100 cm) was the lowest,and the difference of soil moisture content is the highest.In Glycyrrhiza sp.land,the grey correlation degree of soil moisture content and similarity of soil moisture content change are higher during the period from August to October,however it is quite different in July;in Caragana korshinskii land,the grey correlation degree is the lowest in September,and it increases gradually in other months;however,it fluctuates strongly in the change trend of high-low-high-low in Medicago sativa land and natural grassland.The method of grey correlation analysis can be used to ideally identify the similarity or dissimilarity of soil moisture content change under different land use types.
{"title":"Analysis on grey correlation degree of soil moisture content under different land use types in a wind-blown sand area.","authors":"Chen Lin, W. Lei, Zhang Qing-xia, Song Nai-ping","doi":"10.3724/SP.J.1148.2009.00840","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00840","url":null,"abstract":"In this paper,the grey correlation analysis is used to analyze the vertical and monthly dynamic change of soil moisture content under 4 land use types in a wind-blown sand area in Yanchi County,Ningxia Hui Autonomous Region of China.The results show that the vertical change of soil moisture content under different land use types are quite different,the similarity of soil moisture content in the middle layer(30～70 cm in depth) and the deeper layer(70～100 cm) is high,with an order of Caragana korshinskii land natural grassland Glycyrrhiza sp.land Medicago sativa land.The grey correlation degree of soil moisture content between the top layer(0～30 cm in depth) and the deeper layer(70～100 cm) was the lowest,and the difference of soil moisture content is the highest.In Glycyrrhiza sp.land,the grey correlation degree of soil moisture content and similarity of soil moisture content change are higher during the period from August to October,however it is quite different in July;in Caragana korshinskii land,the grey correlation degree is the lowest in September,and it increases gradually in other months;however,it fluctuates strongly in the change trend of high-low-high-low in Medicago sativa land and natural grassland.The method of grey correlation analysis can be used to ideally identify the similarity or dissimilarity of soil moisture content change under different land use types.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"99 1","pages":"840-845"},"PeriodicalIF":0.0,"publicationDate":"2010-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69826231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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