Comparing the Upper Triassic Deep-sea Flysch of the Shannan Terrane with the Coeval Shallow Shelf Sediments of the Tethys Himalaya,Southern Tibet

The provenance and paleogeography of the Upper Triassic deep-sea flysch Langjiexue Group(LG)of the Shannan Terrane in the northeastern Himalaya orogen,south of Yarlung Zangbo,have been disputed in recent years since its affinity to the Tethys Himalaya was suspected during the early 2000 s.Based on the earlier discoveries of the Upper Permian–Triassic basalts and mafic dykes from the LG and of coeval detrital zircons from the Qulonggongba Formation(QF)in shallow shelf sediments of the Tethys Himalaya,the previous viewpoints on the basin and tectonics of the LG have been recently rejected.We compared the two units of the Upper Triassic,and our results reveal a number of differences,discrepancies,and inconsistencies in the debate,raising crucial questions on the postulation and provenance model of the remote Gondwanide Orogen for the LG.It is suggested that more observations and evidence are needed to further improve the paleogeographic understanding and relationship of the two units.

Specificity of Tibetan Chicken Germplasm Resources and Its Breeding and Utilization in Shannan Prefecture of Tibet

Shannan Prefecture of Tibet is the central producing region of Tibetan chicken, and Tibetan chicken feeding has become one of the characteristic industries of animal husbandry in local agricultural and pastoral area, and it is an important source of food and income for the locals. However, because of extensive feed- ing managemem, low level of intensification, blind hybrid of exotic varieties and despising selective breeding, the number of pedigree Tibetan chickens have reduced year by year and the performance of Tibetan chicken herd varied greatly, premium specificity could not be effectively utihzed. By investigating the present situation of Tibetan chicken feeding, analyzing the specificity of Tibetan chicken germplasm resources, the scientific conservation breeding was started to make full use of the advantage of keeping Tibetan chickens on the plateau.

Integration of Family Planning With MCH in Shannan Prefecture

Shannan Prefecture。located on the bank of the Yarhung Zangpo River,is the cradle of Tibetan civi-lization.It is about 200 kilometers from Lhasa,the regional capital。With an area of 73,000 square kilo-meters and a population of 310,000.There are 12 counties,146 towns and townships,and 861 villages un-der its jurisdiction.

SHANNAN ART TROUPE:European Visit Fruitful

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Thoughts on Pairing Assistance to Tibet for Promoting Agricultural High-quality Development in Southern Tibet from the Perspective of Agricultural Power

In the new era,there is an urgent need to further promote pairing assistance to Tibet,promote the simultaneous construction of a strong agriculture in Tibet and the China's Mainland,and compose a Chinese-style modernization.Southern Tibet,located in the southeastern part of the Tibet Autonomous Region,includes Shannan City and Nyingchi City,is a region assisted by four provincial partners including Hubei Province.This paper introduces the agricultural environment in southern Tibet,studies its agricultural characteristics,and analyzes the main issues of its pairing assistance.Taking forging the strong consciousness of the Chinese national community as the main line,the paper explores strategies for promoting agricultural high-quality development in southern Tibet through pairing assistance to Tibet from the perspective of agricultural power,and proposes some strategies,such as inheriting agricultural cultural heritage,promoting the upgrading of modern seed industry,enhancing the characteristic advantages of highland barley(naked barley)and animal husbandry industries,and developing edible fungi and cold water fish industries.

基于多情景分析的西藏山南地区碳达峰预测及路径研究

以西藏山南地区为研究对象,通过构建GM-ImPACT模型,根据不同情景下山南市碳排放峰值预测结果,提出达峰路径和具体的政策建议。研究结果表明,在当前经济增速的基础上,配合强减排策略是山南市获得碳达峰的最优路径。预计山南市提前10年于2024年实现碳达峰,碳排放总量减少20.72%,碳排放强度的下降幅度比全国高7.89个百分点。所提模型框架可用于探索其他城市的碳达峰最优路径。

How urbanization affect the ecosystem health of Tibet based on terrain gradients:a case study of Shannan,China

Urbanization has significant impacts on ecosystem health(ESH)by affecting land-use patterns.The evaluation of the ESH and the spatial correlations between human interference provides an insight into sustainable development as a response to potential ecological degradation if ESH is threatened by further urbanization.We applied the Vigor-Organization-Resilience-Services(VORS)modelto detect the responses of ESH of Shannan Prefecture in the Tibet to urbanization from 1990 to 2015,based on different levels of terrain gradients.The results show that the ESH of the most areas in Shannan reaches the levels of highest health and average health during the study period.By 2015,the area proportion at the highest health level increased by 0.68%,while that of degraded level decreased by 1.51%.Overall,the ESH of areas tends to shrink at higher-level TGs,and urban sprawl with ESH shrinking existed in middle-level TGs in Shannan.Furthermore,a significant spatial aggregation effect was found concerning that low ESH-high CUL type is mainly distributed on the middle-level TGs with dense human population.The results highlight the needs to rationally organize urbanization process in plateau regions based on different TGs,which contribute to maintain ESH advancing people livelihood improvement.

山南市扎囊县沙地生态治理及种子丸粒化技术研究应用

沙漠化和土地退化是当今全球面临的严重环境问题之一,对生态系统稳定性、农业生产和社会可持续发展构成严重威胁。西藏自治区处于中国的高原地带,拥有壮丽的自然景观和丰富的生态资源,但也面临着沙漠化和土地沙漠化的严重问题,其中扎囊县是受影响最严重的地区之一。扎囊县地处山南市,其干旱气候和土地沙漠化已经严重影响当地的生态环境和农业可持续发展。该研究旨在探讨山南市扎囊县沙地生态治理及种子丸粒化技术的研究和应用,以寻求有效的生态修复方法,恢复土地生态平衡,减轻沙漠化问题的影响。

西藏山南市辣椒引种比较试验

为筛选出适合西藏山南市气候和消费习惯的优质高产辣椒品种,对引种的10个辣椒品种进行了抗病性、果实性状、产量和经济效益对比分析。结果发现,10个品种及对照品种均抗CMV、TMV、疫病,中抗炭疽病;‘博辣皱线2号’、‘博辣皱线3号’、‘兴蔬早惠’、‘兴蔬211’等4个品种以及对照品种均为羊角形辣椒品种,‘兴蔬皱皮辣’、‘兴蔬皱辣2号’、‘兴蔬皱香辣’、‘兴蔬玉椒香’等4个品种为牛角形辣椒品种,‘福湘秀丽’和‘福湘碧秀’属于粗牛角形辣椒品种;‘兴蔬皱辣2号’、‘兴蔬211’、‘兴蔬皱皮辣’、‘博辣皱线3号’等4个品种折合每667 m2鲜椒产量分别为3117 kg、3062 kg、3243 kg、3109 kg;‘兴蔬玉椒香’、‘兴蔬皱香辣’、‘福湘碧秀’、‘福湘秀丽’、‘博辣皱线2号’、‘博辣皱线3号’等6个品种折合每667 m^(2)利润分别为8212元、9500元、5548元、6260元、2907元、4827元,经济效益均超过了对照品种‘嘎玉2号’。结果表明,‘博辣皱线3号’的商品性较好、抗病性较强、产量高、效益高,适宜在西藏山南市进行示范并大面积推广应用。

日粮中添加富硒桑叶粉对陕南白山羊屠宰性状和肌肉脂肪酸的影响

[目的]研究日粮中添加富硒蛋白桑叶粉对陕南白山羊屠宰性状指标、肌肉理化特性指标及肌肉脂肪酸和硒含量的影响。[方法]将30只3月龄陕南白山羊羯羊随机分为对照组和富硒桑叶组,每组15只;对照组饲喂基础日粮,富硒桑叶组在基础日粮中添加15%的富硒蛋白桑叶粉;试验期为60 d,预饲期15 d,正饲期45 d;试验结束时进行屠宰试验,测定屠宰性状及肌肉理化特性指标;采集试验羊背最长肌,测定肌肉脂肪酸含量和硒含量。[结果]日粮中添加15%的富硒蛋白桑叶粉可显著(P<0.05)提高陕南白山羊肌肉pH1 h值和失水率;富硒桑叶组的眼肌面积和胴体重大于对照组,但差异不显著(P>0.05)。在2组山羊的背最长肌中检测到19种脂肪酸,其中饱和脂肪酸5种,不饱和脂肪酸14种;2组山羊肌肉中饱和脂肪酸、单不饱和脂肪酸及多不饱和脂肪酸含量占脂肪酸总含量的比例相似,分别约为28%、67%、5%;富硒桑叶组肌肉中的γ-亚麻酸含量显著(P<0.05)高于对照组,但脂肪酸总含量低于对照组。与对照组相比,富硒桑叶组肌肉中硒含量有所升高,但差异不显著(P>0.05);富硒桑叶组(0.0713 mg/kg)和对照组(0.0660 mg/kg)背最长肌硒含量均达到陕西省含硒肉类食品标准。[结论]在陕南白山羊日粮中添加15%桑叶粉可在一定程度上改善产肉量、促进硒在肌肉中的富集、减少胴体脂肪沉积,但由于肌肉失水率显著升高,需在储存和运输过程中尽量避免水分丢失。

雅鲁藏布江山南宽谷流域生态安全格局构建

山南宽谷流域是雅鲁藏布江主要宽谷之一,特殊的地理环境致使该流域既是严重的土地沙化生态脆弱区,也是重要的沿江经济发展带,构建合理的生态安全格局可为未来生态功能提升与经济发展提供依据参考。以山南宽谷流域为研究对象,基于生态系统服务价值和生态敏感性评价,识别出生态源地,利用最小累积阻力值确定了生态安全区并识别生态廊道,构建山南宽谷流域2020年生态安全格局。结果表明:(1)山南宽谷流域生态源地面积为1089.68 km^(2),主要分布于贡嘎县、扎囊县和乃东区内的草场和林区。(2)在山南宽谷流域内建立了高、较高、中等、较低、低水平生态安全区,分别占流域总面积的24.74%、51.24%、10.31%、5.43%、8.28%,不同生态安全区应采取不同的措施以保证生态环境的安全。(3)识别出总长4720.08 km的105条生态廊道,与生态源地、生源点和生态安全区共同构成山南宽谷流域生态安全格局。(4)结合土地利用现状建议山南宽谷流域南岸进行适度产业开发,北岸以生态保护为主,并提出构建“一地一场两区四园”的发展格局。

西藏自治区山南地区鲜食玉米品种筛选鉴定

为筛选适宜山南地区种植的鲜食玉米品种,引进7个鲜食玉米品种在山南地区进行栽培试验,考察各品种的生育期、农艺性状、产量和品质,结果表明:7个品种在山南加查县均能正常成熟,适应性好,全生育期为112~118 d。其中“华耐甜玉782”“小布丁”和“美珍206”鲜穗产量为1462.6~1549.0 kg/667 m^(2),分别较对照增产13.6%,7.9%,7.3%,果穗商品性及品质表现较好,建议在山南地区进一步试验与推广。

不同材质地膜在山南市玉米栽培上的试验初报

为进一步探究不同材质地膜覆盖对西藏玉米生长发育、产量及生产效益的影响,筛选出适宜山南玉米生产应用的可降解地膜,以露地玉米栽培为对照,设置6种不同地膜处理进行田间对比试验。结果表明,在西藏山南温带季风半干旱区种植玉米,采取地膜覆盖促增效应更显著,地膜覆盖可以有效促进玉米生长发育,缩短生育期,提高正常成熟的安全性,籽粒单产较露地(CK)增幅达101.2%~128.0%,净收益在967.8~1 476.2元/667 m^(2),产投比1.30~1.45;其中聚乙烯黑膜的生产效益略高,生态降解膜(慢)、生态降解膜(中)、全生物降解膜及聚乙烯白膜间的单产和生产效益相当,本地区玉米生产可因地制宜地推广应用上述地膜。

西藏山南市河湖长制工作实践和探索

自2017年全面推行河湖长制以来,山南市在落实工作责任、整治侵占河湖、恢复自然岸线和改善河湖面貌等方面取得了显著成效,但也存在运行机制仍不顺畅、基层保障不足等问题。本文从组织体系建设、健全工作机制、加强宣传引导、开展河湖治理、强化监管执法等方面介绍西藏山南市在全面推进河湖长制工作中的具体做法和经验,并针对当前河湖长制工作方面存在的主要困难和问题提出了对策和建议。

山南市鲜食甜、糯玉米新品种引种试验

为筛选出适宜山南市沿江谷地种植的鲜食甜、糯玉米新品种,满足生产和市场消费对优良品种的需求,特从内地引进9个鲜食甜、糯玉米新品种,在山南市乃东区开展品种大区对比试验,试验结果显示:研究区露地地膜覆盖、育苗移栽种植鲜食甜糯玉米宜选用生育期在130 d以内的品种,参试品种“SHZR270”“雪甜7401”“金银早2020”“华甜玉3号”“雪甜232”“SHZR281”的生育期适宜、外观品质优、穗大粒满、农艺性状好,可在同生态区推广种植;结合气象资料推测,保温育苗的适宜播种期在4月下旬至5月初。

江西相山铀矿田山南矿区控矿构造解析与找矿预测

江西相山铀矿为与火山岩有关的中低温热液型矿床,断裂构造控矿特征明显。以相山铀矿田山南矿区为研究重点,开展控矿构造解析和构造控矿规律研究,旨在为隐伏矿床找矿预测提供科学指导。通过详细的野外观测和变形分析,揭示出山南矿区主要的控矿构造,即北北东向、东西—北西西向断裂破碎带都经历了早期压性和晚期张性-张扭性的破碎变形,构成了本区主要的容矿空间。在此基础上,分析了断裂控矿规律,推测破碎带的性质控制了铀矿体产出特征,构造通过控制岩石的变形行为而控制了铀矿体的产出,进而解释了所谓的"岩性控矿"观点。根据构造控矿规律及其控矿构造组合特征与区域综合找矿模型,认为横涧矿区的西南段、岗上英矿区与横涧矿区及石马山矿区的连接处等应为下一步找矿的首选有利区段,同时要注意寻找北北东向和东西—北西西向断裂复合部位的富、大矿体,并关注北北东向断裂成矿期后的活动对矿体的左旋错移情况。

冈底斯东段山南地区第三纪矽卡岩-斑岩Cu-Mo-W(Au)多金属矿床勘查模型及深部找矿意义

冈底斯东段南缘的山南地区分布有努日、明则、克鲁、冲木达和陈坝等中到大型Cu-Mo-W(±Au)矿床,与含矿矽卡岩有关的侵入岩形成于20～30Ma之间,为高钾钙碱性中酸性岩,形成于碰撞晚期构造背景。矿化赋存于下白垩统比马组的碳酸盐岩和其它钙质岩石与岩体的外接触带内及斑岩体内,主要矿化类型为矽卡岩型、斑岩型和热液脉型,构成完整的斑岩-矽卡岩、脉状铜-钼-钨±金多金属成矿体系,矿化组合主要为Cu-W-Mo、Mo、Cu-Au和Cu矿化。外接触带的蚀变以矽卡岩化、角岩化为主,而内接触带上主要为岩体的绢云母化、硅化、绿泥石化等,内矽卡岩不发育。山南地区的矽卡岩型铜-钼-钨(金)矿床均赋存于浅部矽卡岩中,在明则矿区矽卡岩型矿化之下发现了斑岩型钼矿化的存在,暗示该区的矽卡岩型矿化可能与冈底斯中带相似,具有统一的斑岩型-矽卡岩型成矿系统,由此建立了该地区的成矿模式,指出了找矿方向。

西藏山南地区箭筈豌豆与丹麦“444”燕麦混播效应的研究

研究了西藏山南地区不同比例箭筈豌豆与丹麦"444"燕麦的混播效应。结果表明,混播可明显提高产草量和牧草品质,不同混播比例间的产草量、粗蛋白、粗脂肪、NDF、Ca和P含量差异显著(P<0.05),ADF含量差异不显著(P>0.05);随着箭筈豌豆比例的增加,粗蛋白、粗脂肪、Ca和P含量随之增加,而NDF、ADF含量增加。播种比例以箭筈豌豆(50%)+丹麦"444"燕麦(50%)为佳,产草量较高,品质较好。混播能提高土壤有机质、全氮、速效钾的含量。箭筈豌豆与丹麦"444"燕麦按此比例混种在西藏山南可以推荐推广以提高土壤肥力和改善饲草品质。