System Planning of Green Landscapes from the Perspective of Regulatory Planning—A Case Study of Regulatory Detailed Planning of Wenfeng District in Nanchong City,Sichuan Province of China

By taking the regulatory detailed planning of Wenfeng District in Nanchong City for example,public green spaces,protective green spaces and ecological green spaces are planned systematically on the basis of "protective,needs-oriented,systematic and characteristic" principles.Landscape system structure of "one belt,one surface,four axes,five districts and multiple points" was analyzed,concrete designs of landscape infiltration surface,landscape axis and style division elaborated.The way of integrating landscape system planning and current situation was discussed in the image construction of new urban district to co-construct characteristic urban images,realize the coordination of city,environment and culture,optimization of urban eco-environment benefits,orderly and sustainable development of urban ecological conditions.

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.

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.

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.

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.

Green Prevention and Control Technology of Peanut Diseases and Pests in Nanchong City

This paper introduced the main types of peanut pests and diseases in Nanchong City,and proposed green prevention and control technical measures for the reference of local growers.

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.

A Study on the Conservation and Application of the Silk Industry in Nanchong City,Sichuan Province,China

40 years had passed since China implemented its iconic Open Policy and reform.In the past 40 years,the proportion of tertiary industry in large cities like Beijing,Shanghai and Guangzhou has surpassed that of the primary and secondary industries.Even small and medium cities are currently transitioning from the primary and secondary industries towards the second and tertiary industries.Following this transition,the old industrial edifices and buildings are gradually abandoned and neglected.This paper examines the feasibility of Nanchong’s transformation from the textile industry to tertiary or service industry through a comprehensive survey of the status,conservation and application of Nanchong industrial heritage,and explore the new direction for China’s industrial heritage.

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.

Epidemiological characteristics of syphilis in Nanchong City from 2017 to 2021

This study analysed the epidemiological characteristics of the syphilis epidemic in Nanchong City of Sichuan Province to provide a theoretical basis for syphilis prevention and control.The syphilis epidemic data reported in the China Disease Control and Prevention Information System within the Nanchong City from 2017 to 2021.Chi-squared test and linear trend Chi-squared test were used to analyse the distribution of syphilis in terms of time,region,population and development stage.From 2017 to 2021,a total of 16,819 syphilis cases were reported in Nanchong City,with an average incidence rate of 52.35×10^(-5).The number of reported cases and the incidence rate showed an increasing trend and then decreasing.There were 8315 males with an incidence rate of 51.45×10^(-5) and 8504 females with an incidence rate of 53.26×10^(-5).The male to female ratio is 0.98:1.The age group is mainly middle-aged and older people over 50 years old.Occupations are primarily farmers,houseworkers and unemployed workers.Conclusions:In the past five years,the incidence of syphilis has first increased and then decreased in Nanchong City,but the epidemic situation remains severe.In order to effectively curb syphilis epidemic as soon as possible.It is necessary to increase comprehensive intervention efforts for high-risk groups,propose feasible measures to control the epidemic.An effective coordination mechanism needs to be established and extensively mobilise the whole society to participate in publicity and cooperate.At the same time,develop an efficient follow-up service to control the spread of syphilis and to improve the health of syphilis patients.

Present Situation and Development Countermeasures of Modern Agriculture Industrial Clusters of 100 Billion Output in Nanchong City

Industrial clusters have an obvious role in promoting regional economic development and can enhance region core competitiveness.In order to rapidly promote the economic development of Nanchong,from the aspects of agricultural resources,brand advantages,modern agricultural demonstration zones,deep processing of agricultural products and cold chain logistics,the development status of modern agricultural industrial clusters of 100 billion output in Nanchong City is summarized in this article. For existing problems,resolution strategies are proposed from the aspects of focuses,work paths and safeguards.

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。

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。

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。

基于土壤养分空间分布特征的柑橘栽培适宜区划分研究

为了解四川省南充市土壤养分状况与空间分布特征,并在此基础上划分柑橘栽培适宜区。通过对全市土壤11个养分指标进行检测分析,并利用ArcGIS技术构建各养分指标空间分布模型图,再结合柑橘需肥规律划分栽培适宜区。结果表明,南充市土壤呈碱性,有效锰含量严重缺乏,有机质、碱解氮、有效硼、有效锌含量偏低,有效钾、有效铜、有效硫含量适宜,有效磷、有效铁含量极丰富。养分指标空间分布模型图表明,蓬安、西充两个县土壤碱性程度高,有效磷主要集中在嘉陵区,碱解氮、有效铜在蓬安相对集中,有效铁、有效硼分别在阆中、西充较为集中,从北到南有效钾含量逐渐增加。根据适宜区域划分结果,不适宜区、次适宜区、适宜区、相对最适宜区、最适宜区5个区域的比例分别为0.61%、17.53%、55.90%、24.93%、1.03%;不适宜区与次适宜区在各区县均有分布,主要集中于营山、南部等区域,主要原因为pH过高,有机质及其他元素含量过低;适宜区所占比例最高,在各区县均有集中连片分布;相对最适宜区主要集中在蓬安、阆中、高坪;最适宜区范围仅分布在9个乡镇。适宜区及以上等级土壤特点为平均pH值逐渐降低,有机质含量逐渐增加,其余养分含量趋近于丰富和极丰富等级。整体来说,南充市土壤养分分布差异大,离散程度高,需注重碱性土壤的改良和整体肥力的提升,并根据养分的区域分布特征采取针对性施肥方案。全市80%以上的土壤适宜栽培柑橘,并在蓬安、阆中相对集中。

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。

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。