Effect of Irrigation on Groundwater Dynamic Change in the Typical Irrigated Area of Qinghai Province

Under the influence of the natural and human factors, water table of irri- gated area Changes frequently, but it is mainly affected by irrigation water infiltration replenishment during the irrigation. 5 groundwater observation wells were constructed in experimental plot of the Daxia irrigated area to carry out the experiment of the effect of irrigation on groundwater dynamic change in this research. The results showed that the groundwater stage dynarnic change rule of spring and seedling irri- gation stage in the typical plot was fit to the hydrological geology condition of grade- I terrace of Huangshui river valley. On the whole, lateral canal water direction formed a line effect. The No. 1 and No. 2 observation well were the closest to the lateral canal, which received more supplies, and the water level was the highest; the No, 3 observation well took the second place; The No. 4 and No. 5 observation well accepted least supplies, and the water level was the lowest. The rangeability of water table of spring irrigation period was significantly higher than that of seedling irrigation period, this is mainly due to the difference value of intake water volume and drainage water volume of spring irrigation phase was significantly higher than the seedling irrigation phase.

Rb-Sr and Sm-Nd Isochron Ages of the Dongmozhazhua and Mohailaheng Pb-Zn Ore Deposits in the Yushu area, southern Qinghai and Their Geological Implications

Located on the northeast margin of the Qiangtang terrane between the Jinshajiang suture zone and Bangonghu-Nujiang suture zone,the Dongmozhazhua and Mohailaheng Pb-Zn deposits in the Yushu area of Qinghai Province are representative Pb-Zn deposits of the Pb-Zn-Cu polymetallic mineralization belt in the northern part of the Nujiang-Lancangjiang-Jinshajiang area,which are in the front belt of the Yushu thrust nappe system.The formed environments of these two deposits are different from those of sediment-hosted base metal deposits elsewhere in the world.The authors hold that they were formed during the Indian-Asian continental collision and developed within the fold-thrust belt combined with thrust and strike-slip-related Cenozoic basins in the interior of the collisional zone.Studying on the metallogenic epochs of these two deposits is helpful to the understanding of ore-forming regularity of the regional Pb-Zn-Cu mineralization belt and also to the search for new deposits in this region.The age of the Dongmozhazhua deposit has been determined by the Rb-Sr isochron method for sphalerite residues,whereas the age of the Mohailaheng deposit has been determined by the Rb-Sr isochron method for sphalerite residues and the Sm-Nd isochron method for fluorite.The age of the Dongmozhazhua deposit is 35.0-±0.0 Ma （（87Sr/86Sr）0=0.708807） for sphalerite residues.The age of the Mohailaheng deposit is 32.2±0.4 Ma （（87Sr/86Sr）o=0.708514） for sphalerite residues and 31.8±0.3 Ma （（143Nd/144Nd）o=0.512362） for fluorite with an average of 32.0 Ma.Together with the regional geological setting during mineralization,a possible tectonic model for metallogeny of the Dongmozhazhua and Mohailaheng Pb-Zn deposits has been established.These two ages are close to the ages of the Pb-Zn deposits in the Lanping and Tuotuohe basins,indicating that it is possible that the narrow 1000-kilometer-long belt controlled by a thrust nappe system on the eastern and northern margins of the Tibetan plateau could be a giant Pb-Zn mineralized belt.

A New Discovery on the Deformation Behavior of Shale Gas Reservoirs Affecting Pore Morphology in the Juhugeng Coal Mining Area of Qinghai Province, Northwest China

Objective The Juhugeng mining area in Qinghai Province of northwest China has attracted wide attention among geologists for it hosts typical coal measure gases.The shale gas reservoirs were reformed by intensive structural movements during geological periods,

Analysis of Outdoor Cultivation of Pepino(Solanum muricatum)in Qinghai Province

[Objectives]This study was conducted to explore the feasibility of planting pepino(Solanum muricatum Ait.)in Qinghai Province,and to understand the cultivation quality and yield in various areas of Qinghai.[Methods]With small fruit type of pepino as the material,four areas in eastern Qinghai were selected to determine the agronomic traits,yield and quality indexes of pepino.[Results]Under the same cultivation conditions,there were some differences in the cultivation status of pepino,but overall,pepino fruit had higher quality.Various physiological indexes were correlated with quality and yield.[Conclusions]This study clarified the specific cultivation situation of pepino in Qinghai Province,and evaluated the quality and yield of pepino,providing strong data support for the promotion and planting of pepino in various regions in the future.

Development and Research on Rural Regional Characteristic Sports Tourism Industry: A Case Study of Southern Jiangxi Province

With the hope of providing basis for sound development of rural sports tourism industry in economic less-developed region and the establishment of macro industry policy,this paper demonstrated the selection of development way,space frame and product system of rural sports tourism industry in southern Jiangxi Province by consulting document literature and conducting field research and based on the analysis of social background for the rise of rural sports tourism.

Mafic, Ultramafic and Carbonatitic Dykes in the Southern Siberian Craton with Age of ca 1 Ga: Remnants of a New Large Igneous Province?

Virtual absence of igneous complexes with ages between1.8 Ga and 0.8 Ga in southern part of the Siberian Craton allowed to Galdkochub et al.(2010)to formulate a hypothesis of long magmatic quiescence.Most reliable

Analysis on Prospecting Potential of Tungsten Polymetallic Ore in Haergeng of Gonghe County, Qinghai Province

The discovery of Gonghe County Haergeng tungsten polymetallic deposit is one of the most important tungsten deposits discovered in Qinghai Province in recent years.It has important theoretical and practicalsignificance.1 Regional geological background The research area lies in the northwest edge of

Fission track dating of the Cenozoic uplift in Mabian area, southern Sichuan Province, China

The apparent ages of samples are obtained from fission track dating of apatite samples collected from the fault zones in Mabian area, southern Sichuan Province. In addition, thermal history is simulated from the obtained data by applying AFT Solve Program, to acquire the thermal evolution history of the samples. The result shows that tectonically the Mabian area was relatively stable between 25 and 3 Ma, compared to the inner parts and other marginal areas of the Tibetan Plateau. The studied area had little response to the rapid uplift events that occurred for several times in the Tibetan Plateau during 25-3 Ma. The latest thermal event related to the activity of the Lidian fault zone (about 8 Ma ) is later than that of the Ebian fault zone (18-15 Ma ) to the west, indicating to some extent that the evolution of fault activity in the Mabian area has migrated from west to east. The latest extensive tectonic uplift occurred since about 3 Ma. As compared with the Xianshuihe fault zone, the Mabian area is closer to the east- ern margin of the plateau, while the time of fast cooling event in this area is later than that in the southeast segment of the Xianshuihe fault zone (3.6-3.46 Ma ). It appears to support the assumption of episodic uplift and stepwise outward extension of the eastern boundary of the Tibetan Plateau in late Cenozoic.

青海东部干旱区不同紫花苜蓿品种饲用品质和生产性能比较

为筛选出适宜青海省东部干旱区种植的紫花苜蓿(Medicago sativa L.),促进当地畜牧业发展,本研究对29个紫花苜蓿品种生育期、生产性能和营养品质进行对比分析,并采用灰色关联度分析法对参试品种的各项指标综合评价。结果表明:参试紫花苜蓿均可在青海省东部干旱区完成整个生育期,生育期介于172~174 d间,差异较小。29个紫花苜蓿中‘大业3号’鲜干草产量均为最高;‘西贝’株高超1.00 m,显著高于其它品种(P<0.05);‘佳能’分枝数最多超过15个;‘磐石’粗蛋白含量最高,达21.71%DM;‘MT4015’中酸性洗涤纤维含量均较低;‘MT4015’和‘磐石’相对饲喂为价值较高,显著高于其他品种(P<0.05)。利用灰色关联度综合饲用价值和生产性能进行排序,发现‘磐石’‘大业3号’‘218TR’位居前列,兼顾产量和品质,适宜在该地推广种植。

青海省生态修复关键区识别及修复分区划分

[目的]基于“整体保护、系统修复、综合治理”的治理思路识别生态修复优先空间抑制生态退化,是区域社会—经济协调发展、筑牢生态安全屏障和推进生态文明建设的重要举措。[方法]以青海省为研究区,通过土地利用强度、土地利用重心迁移反映城市化进程,定量评估2005—2020年7项生态系统服务、生态敏感性和生境退化度,提出基于“生态系统服务簇—生态敏感性-生境退化度”识别生态修复优先空间,将内部缺陷和外界胁迫相结合,划定5类生态修复优先区并提出相应修复策略。[结果]青海省2005—2020年产水深度分别为125.1,106.9,80.0,135.4 mm,水源涵养深度稳定在15 mm左右。粮食产量由1.42 t/hm^(2)提升至2.02 t/hm^(2),防风固沙能力由2.42 t/hm^(2)提升至4.59 t/hm^(2),土壤保持能力由85.90 t/hm^(2)下降至65.30 t/hm^(2);青海省生态系统服务簇可划分为生态宜居和谐簇、水土耦合协调簇、生态源地保育簇、自然生态修复簇、防风固沙功能簇5类。基于双变量自相关识别生态恢复优先点结果可知,青海省主要关键生态恢复点和自然生态恢复点面积分别占5.26%和2.55%,其中关键生态恢复点和生态宜居簇增加区域在空间上分布基本吻合。[结论]青海省生态修复优先区集中在生态环境脆弱的西北荒漠地区、高海拔山区、水源地和河流沿岸及人类活动较频繁的河湟谷地和天峻县、兴海-玛多—曲麻莱县一带。

皖南山区不同类型森林土壤阳离子交换性能差异

为了解皖南山区不同类型森林土壤阳离子交换性能差异,为该区合理营林提供参考,选取皖南山区6种不同类型森林土壤(杉木林、马尾松林、栓皮栎林、外松林、天然阔叶林和杉木-栓皮栎混交林)为研究对象,比较森林土壤阳离子交换性能的差异。结果表明:(1)研究区土壤呈强酸性,土壤有机质含量为33.84~91.50 g·kg^(-1),总氮含量为0.94~3.37 g·kg^(-1),碱解氮含量为131.58~203.62 mg·kg^(-1),总磷含量为0.22~0.77 g·kg^(-1),有效磷含量为0.17~0.32 mg·kg^(-1);土壤主要缺乏速效磷养分。(2)阳离子交换量在8.09~12.57 cmol·kg^(-1)之间,排序为:天然阔叶林>外松林>马尾松林>混交林>杉木林>栓皮栎林,不同森林土壤间阳离子交换量的差异主要由其土壤有机质的差异引起。(3)交换性盐基总量在1.74~2.72 cmol·kg^(-1)g之间,排序为:马尾松林>外松林>杉木林>栓皮栎林>混交林>天然阔叶林,Ca^(2+)和Mg^(2+)是主要的盐基离子,是成土过程中Ca、Mg优先固持形成的。(4)盐基饱和度在13.97%~28.98%之间,排序为:马尾松林>杉木林>栓皮栎林>外松林>混交林>天然阔叶林,该差异是由淋溶作用和树木对盐基离子的吸收共同作用形成的差异。综上,研究区土壤保肥和缓冲性能较低且供肥能力较差,尤其是土壤速效磷供应能力差。其中松林的供肥保肥能力及缓冲性能明显优于其他树种森林,混交林的速效养分含量更高,故可通过营造松类混交林以及施肥来提高森林土壤供肥保肥能力和缓冲性能。

赣南铁山垅一带水系沉积物地球化学特征及找矿方向探讨

本文基于对铁山垅一带1∶5万水系沉积物测量工作,分析测试了19种元素,并分析总结了各元素地球化学的分布特征、异常特征。结果表明,该区W、Bi、As、Sb、Bi、Co、Se等元素相对富集,Hg、Ag等元素亏损较强;根据元素组合的特征,可将元素分为四组,即W、Sn、Mo、Bi、F高温元素组合,Cu、Pb、Zn、Cd中温元素组合,Au、Ag、As、Sb、Hg低温元素组合,Mn、Cr、Co、Ni亲铁元素组合;圈定了综合异常22处,找矿远景区2处;在铁山垅—白鹅钨铜多金属找矿远景区可主攻石英脉型钨铜多金属矿,石下—胎子岽钨找矿远景区可主攻隐爆角砾岩型钨矿。

基于土地利用变化的苏南生境质量与生态红线评估

【目的】评估和模拟快速城镇化对生境质量的影响,为优化生态红线区和生态敏感区调整提供科学依据,进而优化国土空间规划和加强生态空间管控。【方法】以江苏省南部为例,基于PLUS模型、InVEST模型和热点分析等方法,评估2000、2010、2020年的土地利用变化规律、生境质量与退化度的时空演变、预测2030年的变化趋势,并综合定量评估生态红线区生境质量。【结果】(1)2000—2020年,苏南地区土地利用发生显著变化,主要表现为耕地向建设用地和水域转移;生境质量均值呈下降趋势,空间上形成了东西高,中间低的分布格局;生境退化度呈现“中心低–外部高”的圈层分布。(2)2030年3种土地利用模拟情景中,城镇发展情景下,耕地面积减少最多;生态保护情景下,森林和湖泊得到严格保护;可持续发展情景下建设用地规模得到控制。生境质量均值的排序为生态保护情景>可持续发展情景>城镇发展情景。(3)热点分析得出,2020年苏南地区乡镇尺度的生境质量和退化度呈集中分布,城镇中心为冷点区域,热点主要分布在森林和山脉,水域为生境质量的高值区。(4)生态红线区域内的生境质量整体高且相对稳定;在未来预测中,生态保护情景会扩大错位面积,可持续发展情景会降低错位面积。【结论】快速城镇化和人类活动剧烈是导致苏南地区和部分生态红线区内生境质量下降的主要原因。

皖南山区洞栖性蝙蝠的本底资源现状调查

2022年6—8月,基于竖琴网、雾网、抄网等工具,对安徽省皖南山区洞栖型翼手目(Chiroptera)多样性进行了调查。调查中共发现翼手目动物4科4属17种,其中,菊头蝠科(Rhinolophidae)1属8种,占比47.05%;蹄蝠科(Hipposideridae)1属2种,占比11.76%;蝙蝠科(Vespertilionidae)1属6种占比35.29%;长翼蝠科(Miniopteridae)1属1种,占比5.88%。从动物区系来看,东洋型共有12种,占比70.59%,南中国型(1种)和季风型(4种)较少。结果显示皖南山区在安徽省洞栖蝙蝠物种丰富度方面,具有较高的多样性水平。此外,在调查的基础上,对皖南山区洞穴型蝙蝠的濒危等级、保护现状、区系特点进行了概述。本次调查能够为安徽省后期开展的翼手目动物资源调查与监测工作提供科学依据。

幼儿园推普助力乡村振兴路径研究——基于对青海乡村幼儿园推普现状的调查

语言输入、语言加工、语言输出是语言习得的基本路径。从语言习得的角度看,推普具有社会性,互动生成是语言习得和推普的关键环节。本文立足推普助力乡村振兴的时代背景,以幼儿园教师为关注重点,通过对青海农村幼儿园教师和幼儿及家长互动和习得方式的推普调查、分析,旨在厘清青海农村推普中存在的短板与不足,探索影响与推普效果的内外在因素,并在此基础上提出“一中心三主体三体系内循环外联动”的“133”农村幼儿园推普模型,家园社融合的推普路径助力农村高质量推普。

基于生态水文变异特征的济南南部山区河流生态需水研究

[目的]开展基于生态水文变异特征的山东省济南市南部山区河流生态需水研究,为区域水资源综合管理和生态保护,加强黄河流域生态保护,促进黄河流域可持续发展提供理论依据。[方法]收集1979—2021年黄河下游济南南部山区的崮山站(北大沙河)和卧虎山站(玉符河)的径流量数据,采用累积距平法,Mann-Kendall(M-K)检验法,滑动T检验法,双累积曲线法多种统计分析方法,分析径流突变点;结合IHA-RVA法,研究济南南部山区河流径流变异特征和生态需水;通过分析河流生态需水满足度,研究区域生态水文和生态需水变异的主要影响因素,提出济南南部山区生态需水的保障措施。[结果]北大沙河和玉符河的径流量突变点为1996年,整体水文改变度分别为72.75%和69.42%,均属高度改变;北大沙河和玉符河的年生态需水分别为1.47×10^(6),1.81×10^(6) m^(3)。总体上,北大沙河月生态需水满足度平均为32.35%,玉符河月生态需水满足度平均为60.42%。[结论]济南南部山区在突变前后水文变异较大,总体的生态需水满足度整体偏低,可从河流生态调度和提高水资源利用效率方面加强河流生态需水保障。

浙南山地血缘型传统村落空间形态表征研究--以温州泰顺四村为例

快速城镇化背景下浙南山地血缘型传统村落的空间形态遭到持续性破坏。以浙江省温州市泰顺县库村、百福岩村、溪东村、桥西村为研究对象,立足自然环境要素和社会关系要素,定性和定量相结合研究方法,解读村落二维空间、亲水空间、交往空间和宗族空间的形态特征。

青海浅山地区燕麦豌豆混作模式研究

为寻求能显著提升青海浅山地区生产性能、饲用营养品质和经济效益的燕麦豌豆混作技术模式,文章以5个燕麦和1个豌豆品种为供试材料,按照8:2播量设置5个混作和6个单作处理。通过探索不同处理下的生产性能和营养品质差异,筛选出生产性能、营养品质和总收益均优良的最优混作组合,再设置9个不同混作比例和7个不同混作方式处理,筛选出能稳定实现粮草双高、饲草品质优良、总收益提高的适宜混作比例和混作方式。试验结果表明燕麦“牧王”和豌豆“草原224”混作组合为浅山地区推广的较为优良的禾豆混作组合,在适宜混作比例和混作方式下,可最大程度发挥出优越的生产性能和优良的饲用营养价值,可为青海浅山地区农业结构调整和产业提质增效提供借鉴和推广。

地质背景复杂区的找矿技术组合研究——以青海省柳弯区块状硫化物矿床为例

青海省柳弯区矿集区内块状硫化物矿床是北祁连地区较为重要的海相火山岩型矿床,矿体赋存于次火山岩中,受后期构造破坏,矿体分布规律难以掌握。自20世纪90年代以来,该区多金属矿找矿利用了地、物、化、遥等多种方法手段,涉及该区及周边各种地质工作较多,但未能系统总结不同方法、不同物化探工作在该区铜多金属矿找矿上的应用效果,因此在找矿方面一直未能取得突破。本次研究从分析多金属矿床覆盖层厚度、矿床和矿体地质特征、不同物化探异常特征入手,总结地质背景下矿化体的物化探特征,进一步缩小找矿靶区,并通过钻探深部验证,在下柳沟、弯阳河、下沟老矿段深部发现隐伏矿体,在老矿段之间的空白区圈定了工业矿体,同时在矿区外围的下沟沟脑-苇夏沟一带发现较好的找矿线索。综合分析认为,本区有效的找矿技术组合为重力+激电+地气+可控源+钻探,可为新一轮找矿突破战略行动中“在哪找、怎么找”提供参考。