南充市大豆玉米带状复合种植调研报告

为了解南充市大豆玉米带状复合种植现状,文章以南充市南部县与西充县多个大豆玉米带状复合种植示范区为调研对象,对调研区的基本种植情况、存在问题进行调研,提出促进南充市大豆生产发展建议,包括优选良种,加强田间管理;推进西南丘区小型智能农机装备研发进程;提供政策扶持,加快大豆生物育种步伐,旨在为提升南充大豆单产水平提供参考,助力南充市大豆产业发展。

城市绿地乔木固碳能力及碳抵消效果评估

定量测算城市绿地乔木固碳能力及抵消碳排放,可为森林城市建设的树种选择和配置提供决策支持。基于高清卫星遥感影像数据和有关经济社会统计数据,结合实地调查,利用生物量模型法测算南充市主城区绿地乔木的固碳能力,探讨群落结构与固碳能力的影响;分析抵消城市能源CO_(2)排放的成效。结果表明:1)南充市主城区绿化植被中木本植物共269种,分属76科163属。出现频度最高的为桂花、银杏、黄葛树、天竺桂、樟木、樱花等10个树种。2)各类绿地林分平均密度677±425株·hm^(-2),平均胸径21.01±7.15 cm,平均树高8.52±2.06 m。3)各类绿地碳密度按大小为广场用地>附属绿地>公园绿地>防护绿地;固碳速率最大的是附属绿地(2.54 t·hm^(-2)·a^(-1)),最小的是公园绿地(1.64 t·hm^(-2)·a^(-1))。4)南充市主城区绿地乔木2020年碳固定量为9 347 t,能源CO_(2)总排放量为1 016.55万t,绿地乔木大约抵消城市能源0.09%CO_(2)的排放量。最后,建议南充市在城市森林营建过程中,应优先考虑多树种混合使用,并适时调整群落密度以优化林分结构、改善生境条件,促进林木整体水平的生长,进而提高群落的固碳能力;同时尽量采用近自然、较为粗放的经营方式,以减少碳排放。

政产学研视域下南充市生命科学协同创新发展路径研究

科技创新在推动科研、技术进步和产业变革中具有重要地位,是提升综合国力的关键驱动环节。本文基于南充市生命科学政产学研的现状,以南充市政府、高校、科研院所等为研究对象,探讨南充市生命科学政产学研一体化协同创新发展路径,提出加强政策支持、深化科研合作、创新氛围营造、人才引进与留住、资金投入增加、成果转化和知识产权保护等建议,以期为南充市生命科学协同创新发展提供借鉴和思考。

基于成本分析的四川省血液集中化检测的研究

目的随着输血技术的进步和发展,我国采供血机构存在血液检测模式比较分散,效率低,成本高的问题。集中化检测模式不仅能有效提高血液检测质量,还能从人工、设备等各方面节约成本。因此,本文依据四川省血液检测相关数据,综合考虑了血液检测的运输成本、检测成本和中心运营成本,研究了血液检测的最小成本模型。方法以血液检测年成本为目标函数,以标本处理能力、标本分配、运输和中心建设的逻辑关系、运输决策与运输量的一致性为约束条件建立混合整数规划模型。以四川省为例进行实证分析,通过访谈及调研形式收集数据,为满足模型需求对分段式数据做线性处理及调整,通过python编码及优化库进行模型运算并验证最优方案。结果建立了适合我国的集中检测实验室数量和选址的混合整数规划模型。在四川省的实证分析中,收集到模型所需数据,并对分段式数据做了线性处理。本研究通过详细的成本分析计算得出,最经济的方案为:以成都和遂宁为基点建立集中检测实验室;最不经济的方案为21个血站独立检测。与最不经济方案比较,最经济方案可节省29.433%的成本。为确保该结果的可靠性,我们对上述结果执行了多轮验证,进一步的分析揭示,相较于最优解,在成都和巴中构建检测中心的方案为次优选择,与最不经济方案比较,该方案可节省29.431%的成本。结论本文构建了集中检测实验室数量和选址的混合整数规划模型,首次从成本角度,为我国区域化血液集中检测的选址问题提供了决策依据,并对四川省进行了实证分析,求解了成本最低方案。

甘平和明日见杂柑在南充市的引种表现及关键栽培技术

甘平和明日见是20世纪90年代日本选育的高糖低酸晚熟杂柑品种。2016年从西南大学柑桔研究所引进甘平和明日见至南充进行试种观察。在南充,香橙砧甘平和明日见树体生长健壮,开花着果能力较强,果实于1月成熟,可溶性固形物分别为13.8%和14.3%,可滴定酸分别为0.875和1.012 g/100 mL。露地种植裂果严重,甘平和明日见裂果率分别高达53.6%和63.4%。在第二次生理落果期后搭建避雨棚,同时喷施20 mg/L赤霉酸和补充钙钾磷元素,可有效降低裂果率,每667 m^(2)产量可分别达到1146.1和1103.2 kg。甘平和明日见在南充种植品质优良、商品性好,但对种植技术和基础设施条件有较高要求,适宜小面积推广种植。栽培管理的核心工作是降低裂果。

南充市主城区木本植物区系分析

对南充市主城区木本植物调查,分析木本植物区系特征,为南充市创建国家森林城市提供参考.通过调查统计,南充市主城区现有木本植物84科、173属和265种.主城区木本植物区系组成主要为寡种科、单种科和少种属.高校植物区系地理成分复杂,木本植物以热带和温带分布为主,而本土树种,珍稀濒危树种数量有待提高.

2010—2020年南充市湿地及其生态系统服务价值变化

湿地生态系统服务价值是湿地生态功能的重要体现,也是进行湿地生态环境保护及可持续利用的基础。本文选取四川省南充市为研究区域,利用30 m空间分辨率土地覆盖数据对南充市2010—2020年的湿地变化进行了分析,同时利用当量因子法对2010年和2020年南充市湿地的生态系统服务价值进行了评估。结果发现:南充市的湿地主要分布在嘉陵江及其支流以及升钟湖、清水湖等国家湿地公园;2010—2020年,南充市的湿地面积净增加约5001 hm^(2),增加的湿地主要来自耕地、林地和草地,湿地生态系统服务价值从78.972亿元提升至81.724亿元。南部县、阆中市、蓬安县是南充市湿地生态系统服务价值的高值区,其生态系统服务价值约占南充市的62%。2010—2020年,南充市湿地生态系统服务价值的增幅仅为3.5%,明显小于湿地面积的增幅(21.6%),生态系统服务价值基数降低是南充市湿地生态系统服务价值增幅较小的原因。今后,南充市要着重提升湿地的生态系统服务价值,特别是要促进湿地文化服务价值的提升;同时也要加强湿地的生态保护和修复工作,挖掘嘉陵江及其沿岸湿地和农村小微湿地的生态系统服务价值。

南充高新技术企业发展分析及对策

掌握高新技术企业发展现状、解析企业科技创新存在的不足、研究培育和发展高新技术企业的有效措施,对保持和强化高新技术企业的创新主体地位、促进高新技术产业发展、增强地区科技竞争力具有重要意义。运用数据分析2018—2022年南充高新技术企业发展状况,从创新投入、创新产出和经济效益等角度展开自主创新发展实证研究。研究发现,在企业质数、领域发展、创新和盈利能力、扶持政策等方面存在诸多问题,为此提出需要政府、企业和市场充分互动,着力完善政策梯次培育,构建领军企业平台,加大投入激发活力,促进成果产出转化,校企合作培养人才,优化环境引导发展等高新技术企业递进发展的对策建议。

南充市高坪区早熟蓝莓气象条件分析

利用南充市高坪区气象资料和蓝莓生产资料,统计分析气象条件及气象灾害对高坪区青居蓝莓基地早熟蓝莓生长的影响,初步确定了早熟蓝莓气象服务指标。结果表明,高坪区发展早熟蓝莓具有较明显的气候优势,冬暖春早、花期无低温冷害,适宜早熟蓝莓生长发育;气象灾害对高坪区早熟蓝莓影响偏轻,主要气象灾害有连阴雨、干旱、大风等,但强度一般或出现频次低,对蓝莓影响较小。高坪区应在海拔400 m以下地区规模种植早熟蓝莓,同时做好气象服务保障,以提高种植效益。

南充市福寿螺种类与遗传多样性分析

本研究基于线粒体COⅠ基因对南充市福寿螺种类和遗传多样性进行了研究,并与国内其他已报道的福寿螺种群,尤其是川渝地区进行了比较和系统分析。结果表明:(1)南充市辖三区共发现小管福寿螺(P.canaliculata)和斑点福寿螺(P.maculata)2种。其中,小管福寿螺单倍型以Hap2(43.33%)和Hap5(20.00%)为主,单倍型多样性为0.63,核苷酸多样性为0.02000,核酸平均差异数为13.88,遗传多样性较高;斑点福寿螺以Hap7(20.00%)为主,单倍型多样性为0.29,核苷酸多样性为0.00046,核酸平均差异数为0.29。(2)优势单倍型Hap2、Hap5和Hap7在川渝地区广泛分布,并分别与中国分布广泛的单倍型Pc4、Pc1和Pm10同源。建议南充地区的福寿螺防控以小管福寿螺为主要对象,同时将高坪区螺溪河作为福寿螺重点管理和防治区域。

支持自动点灯功能的汉巴南高铁调度集中系统设计

针对汉巴南高铁在项目开通初期需在常态灭灯区段运行LKJ控车模式列车的实际需求,经过研究对比,选择调度集中系统自动点灯方案为信号系统配套实施方案。方案涉及中心行调台、各级中转接口服务器、车站追踪服务器和自律机等多个子系统及其内部模块的开发升级。以兼容和扩展为原则进行方案整体设计,提供LKJ控车模式数据灵活输入和可靠传输机制,在车站核心自律机增设自动点灯模块和升级计划执行模块,完成自动点灯逻辑与既有排路逻辑融合、自动点灯时机计算以及自动点灯重试和报警等功能。增设参数进行业务管控和算法调优,确保自动点灯功能的安全性、适配性和精准性。方案已成功应用于汉巴南高铁并取得预期效果,为调度集中系统在复杂场景下的功能补齐提供解决思路。

城镇污水厂尾水排放对嘉陵江流域微生物群落的潜在影响

为了探究城镇污水排放对嘉陵江流域水体中微生物群落的潜在影响,于2021年12月下旬,采集嘉陵江(南充段)流域8个污水处理厂的进水、尾水以及附近水样品,测定了常规水质指标,并利用Illumina NovaSeq 6000平台对水体微生物群落进行测序分析。结果显示:pH为附近水>进水>尾水,TN、NH_(4)^(+)-N、TP为进水>尾水>附近水。尾水中的微生物多样性高于进水和附近水;所有水体中,微生物均以变形菌门(Proteobacteria)为主,但不同来源水体群落组成显著不同;相较于附近水,尾水中微生物具有更多的特有种。此外,相关性分析结果表明,附近水的微生物群落与水体理化因子相关性最大,且仅附近水的微生物多样性指数与理化因子相关。综合来看,嘉陵江南充段城镇污水厂尾水的微生物可作为生物源影响江水微生物,且尾水亦能通过提升水体营养间接影响江水微生物群落组成。城镇污水厂应该进一步改进净水工艺,降低尾水水体营养,同时提升杀菌强度,从两方面来避免沿岸城镇污水处理厂尾水对嘉陵江微生物群落的潜在影响。

Analysis and Regionalization of Climate Ecological Conditions for Blueberry in Nanchong City Based on GIS

By using the meteorological data,GIS data and blueberry production data of Nanchong and the surrounding areas in Nanchong from 1991 to 2022,the climate ecological suitability of blueberry was analyzed based on the growth habit of blueberry,and the restrictive and high-impact factors were selected as zoning indicators to carry out climate ecological zoning.The results show that Nanchong has a humid climate,and the annual average temperature in most parts is 15.0-17.8℃;the cold temperature duration in winter is more than 770 h,and the average maximum temperature in July is more than 30.0℃,so it is suitable for planting southern high-bush blueberry,rabbit-eye blueberry and a hybrid of northern and southern high-bush blueberry.Sunshine,high temperature in midsummer,daily temperature range at the fruiting stage and terrain slope are the main limiting or high-impact ecological factors of blueberry production in Nanchong,among which the adverse effect of insufficient sunshine is the largest.The meteorological disasters affecting blueberry production in Nanchong mainly include rainy weather,rainstorm and flood,high temperature and drought.High temperature and heavy heat damage in midsummer in areas at an altitude below 400 m have a great impact on the production of late-maturing blueberry.High temperature and summer drought are often accompanied in the southeast,which will aggravate the adverse effects.The suitable area of blueberry in Nanchong is mainly distributed in the shallow hilly area and the low-mountain deep hilly and gentle slope area at an altitude of 350-700 m.The less suitable area is mainly distributed in the flat dam area of shallow hill-valley at an altitude of below 350 m,the low-mountain area at an altitude of above 700 m,and other hilly areas with a slope of 15-30°.The unsuitable area is mainly distributed in hills with slope>30°,some sporadic shallow hills and flat dams at an altitude of below 300 m,river banks,water wetland buffer zones,etc.In order to make full use of the climate resources and the advantages of blueberry varieties,early-and medium-maturing southern high-bush varieties should be mainly planted in the low-altitude area below 400 m in Nanchong,and medium-and late-maturing varieties should be mainly planted in the medium-altitude area above 400 m.

Importance of Comprehensive Ecological Restoration of Mountains,Rivers,Forests,Farmland,Lakes and Grass:A Case Study of the Shichuan River

With China's economic development and population growth,China's ecological environment continues to deteriorate.The comprehensive ecosystem restoration of the Shichuan River aims to build an ecosystem containing"mountains,rivers,forests,farmland,lakes and grass"by determining scientific and reasonable thickness of foreign soil,pollution restoration,ecological reconstruction,safeguard measures,etc.It brings new vitality to local ecological environment remodeling and economic development.

Ideas for Accelerating Development of Deep Processing Industry of Agricultural Products--A Case Study of Nanchong City

In order to provide certain references for further deepening the development of processing industry of agricultural products,this paper analyzed and elaborated the basic principles,construction priorities and safeguard measures of the development of deep processing industry of agricultural products in Nanchong City of Sichuan Province. Besides,it made a scientific planning for accelerating the deep processing of agricultural products in Nanchong City in 2018-2020,to ensure the full implementation of fine and deep processing of agricultural products.

Cultivating New Agricultural Operators to Promote the Transformation and Upgrading of Traditional Agriculture——A Case Study of Nanchong City

In order to provide reference for cultivating new agricultural operators to promote the transformation and upgrading of traditional agriculture,the main practices,achievements and problems of cultivating new agricultural operators to promote the transformation and upgrading of traditional agriculture in Nanchong City,Sichuan Province were analyzed firstly,and then some measures were proposed.

Advantages of Nanchong City in Developing Late-maturing Citrus and Countermeasures

Nanchong City has the advantages of developing late-maturing citrus in ecology,no-quarantine diseases and insect pests,base construction starting taking shape,production and management technology becoming increasingly mature,leaders paying close attention and market recognition,and significant income increase of fruit growers. However,there are also problems such as weak infrastructure and weak anti-disaster ability,inadequate technology extension system,unmatched cold chain warehouses,and uneven quality of seedlings. Therefore,it is recommended to make scientific plan in accordance with actual local situations,regulate fine variety breeding and market supervision,build orchards with high standard and strengthen management,do a good job of propaganda and branding,improve post-harvest processing,extend the industrial chain,and issue preferential policies to promote the development of citrus industry in Nanchong City.

China's Silk Road Originates from Nanchong and Develops across the Whole World

The following views regarding the Southern Silk Road are presented and discussed. First, primitive wild mulberry trees were transplanted from Nanchong to the world. Second, primitive wild silkworms immigrated from Nanchong to the world. Third, the ancient silk of China originated in Nanchong and spread across the world. Fourth, Sichuan silk arrived in Afghanistan and ancient Egypt one thousand years earlier than Zhang Qian's arrival. Fifth, the appearance of the Southern Silk Road precedes the appearance of the Northern Silk Road and the Maritime Silk Road by hundreds of years. This article supports the belief that as the headstream of the Southern and Northern Silk Road, Nanchong is the intersection of "the Belt and Road"as well as the Yangtze River Economic Belt.

Analysis on Development Potential and Development Measures of Nanchong Ecotourism

Ecotourism is a new type of tourism characterized by unique ecological environment as the main landscape and a new trend of sustainable development of tourism industry.Nanchong region is one of the potential areas for developing ecotourism in Sichuan Province,and its potential for ecotourism is evaluated as the basis of realizing the sustainable development of industries in Nanchong region.The AHP is used to evaluate and then study the Nanchong region as per the evaluation result,so as to propose the measures and suggestion of developing ecotourism in Nanchong region.

Characteristic Construction of Nanchong City

With the gradual improvement of urban economic conditions,the features of local cities have been seriously damaged,and their characteristics have gradually weakened or even disappeared in the wave of urbanization.Taking Nanchong City,the core city in Sichuan-Chongqing region,as the research object,the paper excavates the local characteristics of Nanchong by means of historical tracing and field investigation.Through the research on the urban characteristics of Nanchong,it is hoped to provide some references for the construction of local urban characteristics in the rapid development of China at the present stage.