Preliminary Study on Forest Fire Prevention and Extinguishing in Townships in the Southern Mountainous Areas of Zhejiang Province:A Case Study of Lishui

Forest fires seriously threaten forestry resources and the life and property safety of people in mountainous areas of Lishui City. In this paper, a fire prevention concept with refined forecast and early warning of forest fire danger weather ratings in townships as the starting point, satellite real-time observation of fire spots, monitoring of the Internet of Things and other high-tech products as an implementation means, and strengthening forest fire prevention equipment and personnel in townships as a guarantee was established. The command system for rapid emergency response by cities, counties and townships should be improved. During the forest fire prevention period, fire sources should be strictly controlled, and the basic principles of forest fire fighting in townships should be implemented into the actual fire prevention and fire fighting work to eliminate forest fires in time at the initial stage and before the disaster.

Study on the Countermeasures of Eco-environment Conservation in the Mountainous Areas of Southern Ningxia under New Situation

Under the implementation of principal functional zoning,further promotion of western development,regional migration,new countryside construction,global warming and so on,the spatial adjustment of regional industry and its structure must be enforced.The spatial adjustment and arrangement of population and economy in the mountainous areas of southern Ningxia could create tremendous opportunity for its eco-environment conservation.Based on analysis on the opportunity and challenge of eco-environment conservation in the mountainous areas of southern Ningxia,some countermeasures of eco-environment conservation were discussed in the paper,so as to provide some theoretical references for the eco-environment conservation in the mountainous areas of southern Ningxia.

Analysis on the Climatic Characteristics of Hail in the South Mountain Area of Ningxia

[Objective] The research aimed to study the climatic characteristics of hail in the southern mountain area of Ningxia in recent 50 years. [Method] Based on the hail observation data of 5 surface meteorological stations (Guyuan, Xiji, Jingyuan, Longde, Liupanshan) in the south of Ningxia during 1960-2009, the spatial distribution rule, the interannual and monthly climatic characteristics and variation trends of hail in the south mountain area of Ningxia were analyzed by using the statistical method. Moreover, the hail disaster prevention and reduction measures in Guyuan were put forward. [Result] The hail in the south mountain area of Ningxia in recent 50 years had the obvious annual, seasonal, monthly and daily variation characteristics. The hail might occur from March to October and mainly concentrated during May-August which occupied 72% in the whole year. The occurrence probability of hail in June was the biggest and occupied 21.7% in the whole year. It was the typical multi-hail zone in summer. The interannual variation of hail occurrence in Guyuan was big and had 3-year periodicity. The secondary-order time trend of hail in Guyuan was the anti-parabolic type, and the hail occurrence times during the 1960s-1980s presented the increase trend. It was the hail multi-occurrence period in the 1970s and 1980s. After the 1990s, the hail presented the decrease trend. In recent 20 years, the hail significantly decreased. The hail in Guyuan mainly concentrated during 12:00-21:00, and the hail occurrence times occupied 85% of total times. The hail distribution in Guyuan area had the obvious regional characteristics. The hail in the mountain area, hilly area was more and in the stream valley, north Pingchuan area was less. The hail cloud mainly derived from the mountain areas, such as Liupanshan, Nanhua Mountain, Yueliang Mountain, Xifeng Mountain and Yunwu Mountain, etc. The move direction of hail cloud was mainly from northwest to southeast or from north to south. Part of hail cloud disappeared in the original place. According to the regional distribution of hail, the hail risk in Guyuan City was divided into the high, moderate and low occurrence zones by combining with the hail disaster data. [Conclusion] The research provided the scientific basis for the forecast, early-warning of hail weather and the artificial hail suppression.

Response of Artificial Grassland Carbon Stock to Management in Mountain Region of Southern Ningxia, China

Grassland is a major carbon sink in the terrestrial ecosystem. The dynamics of grassland carbon stock profoundly influence the global carbon cycle. In the published literatures so far, however, there are limited studies on the long-term dynamics and influential factors of grassland carbon stock, including soil organic carbon. In this study, spatial-temporal substitution method was applied to explore the characteristics of Medicago sativa L.(alfalfa) grassland biomass carbon and soil organic carbon density(SOCD) in a loess hilly region with different growing years and management patterns. The results demonstrated that alfalfa was the mono-dominant community during the cutting period(viz. 0–10 year). Community succession began after the abandonment of alfalfa grassland and then the important value of alfalfa in the community declined. The artificial alfalfa community abandoned for 30 years was replaced by the S. bungeana community. Accordingly, the biomass carbon density of the clipped alfalfa showed a significant increase over the time during 0–10 year. During 0–30 year, the SOCD from 0–100 cm of the soil layer of all 5 management patterns increased over time with a range between 5.300 ± 0.981 kg/m2 and 12.578 ± 0.863 kg/m2. The sloping croplands had the lowest SOCD at 5.300 ± 0.981 kg/m2 which was quite different from the abandoned grasslands growing for 30 years which exhibited the highest SOCD with 12.578 ± 0.863 kg/m2. The ecosystem carbon density of the grassland clipped for 2 years increased 0.1 kg/m2 compared with the sloping cropland, while that of the grassland clipped for 10 years substantially increased to 10.30 ± 1.26 kg/m2. Moreover, the ecosystem carbon density for abandoned grassland became 12.62 ± 0.50 kg/m2 at 30 years. The carbon density of the grassland undisturbed for 10 years was similar to that of the sloping cropland and the grassland clipped for 2 years. Different management patterns imposed great different effects on the accumulation of biomass carbon on artificial grasslands, whereas the ecosystem carbon density of the grassland showed a slight increase from the clipping to abandonment of grassland in general.

The Models for the Development of Specialty Agriculture in the Hilly Areas of Southern Ningxia: Are They Truly Effective?

The development of specialty agriculture is of great significance to western China's agricultural structure adjustment,and it's an essential way for the construction of ecological agriculture in Southern Ningxia mountainous area.This paper makes a summary about the development status of specialty agriculture in Southern Ningxia Mountainous Area and put forward the basic benefit goal and problems needing attention.On this basis,the paper studies the development pattern of specialty agriculture in Southern Ningxia Mountainous Area from the aspects of production factors and industry.This paper suggests that the development pattern of specialty agriculture in Southern Ningxia Mountainous Area should combine the regional agricultural pattern and innovative organization structure pattern,demonstration agriculture and market-directing pattern,engineering agricultural pattern and enterprise-driven pattern.The development of specialty agriculture in Southern Ningxia Mountainous Area should promote the three patterns,in order to achieve the construction of ecological agriculture and agricultural structure adjustment.

微生物菌剂对连作芹菜根际土壤真菌群落多样性与结构的影响

以宁南旱区连作4年芹菜根际土壤为研究对象,采用田间定位试验结合高通量测序技术,以常规施肥(CK)为对照,研究常规施肥+枯草·哈茨复合菌剂(MF),常规施肥+枯草芽孢杆菌(BS),常规施肥+哈茨木霉菌(TH)3个处理对芹菜连作根际土壤真菌多样性及群落组成的影响。结果表明:施用枯草·哈茨复合菌显著提高了土壤有效磷、速效钾含量,增幅分别为34.29%和9.98%。施用微生物菌剂增加了土壤脲酶、蔗糖酶活性,平均增幅分别为43.16%和12.98%,并显著改变了土壤真菌的β-多样性。被孢霉属(Mortierella)、织球壳属(Plectosphaerella)、赤霉菌属(Gibberella)、链格孢属(Alternaria)、镰刀菌属(Fusarium)是各处理优势菌属,施用枯草·哈茨复合菌显著降低了赤霉菌属、链格孢属、镰刀霉属等真菌性病原菌的相对丰度,降幅分别为59.88%、51.63%、36.13%。冗余分析表明土壤蔗糖酶、脲酶、碱性磷酸酶活性、pH值和全磷是影响真菌群落结构组成的主要驱动因子。综合而言,枯草·哈茨复合菌剂的施用不仅降低了连作芹菜根际土壤镰刀菌属、链格孢属、赤霉菌属等病原菌的富集,还通过改变有效磷、速效钾等土壤理化性质,进一步重塑土壤真菌群落结构。

苜蓿蓟马空间动态与作物布局关系研究

【目的】明确宁夏南部山区苜蓿蓟马空间种群动态与作物环境布局之间的关系。【方法】利用高空遥感无人机获取宁夏南部山区4个研究区域的遥感图片,经处理后计算其景观格局指数,明确景观与蓟马种群动态之间的关系。【结果】离散核心区数量(NDCA)、总边界长(TE)、总面积比(CA/TA)、核心区面积均值(Core_MN)、斑块丰度密度(PRD)与蓟马发生量相关,相关系数为-0.99~0.97。【结论】南部山区在梯田、台塬上种植苜蓿,对于蓟马控制具有地形优势;蓟马在跨越高低起伏的地形上,必须依靠一定的气象条件才能顺利转移;但生境破碎化,容易造成蓟马爆发成灾。

高质量发展视角下黄河流域国土空间分区规划策略与实践——以济南市南部山区为例

从高质量发展视角切入,分析国土空间分区规划的发展历程及目标定位,针对国土空间要素多元化、空间协同化等特征,提出系统集成的规划理念,以及生态保护、文化复兴、产业提质、城乡友好“四位一体”的规划策略和切实可行的规划实施路径。以济南市南部山区国土空间分区规划为例,分析高质量发展背景下区域面临的瓶颈,指出编制南部山区国土空间分区规划的迫切性,并紧扣地域资源特征与存在问题,探索建立要素集成、融合高质量发展的规划策略,旨在对同类地区的规划工作有所启示。

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。

近40年济南南部山区土地利用/覆被的变化特征及影响因素研究

基于济南南部山区1980、1995、2005、2010、2015、2020年6期土地利用/覆被数据,结合土地利用/覆被变化的转移矩阵、单一动态度和综合动态度等指标,研究近40年济南南部山区土地利用/覆被的时空演变特征,采用主成分分析法,探究了研究区土地利用变化的影响因素。结果表明:南部山区的主要土地利用类型为耕地、林地和草地,其占比为90%左右,林地、草地主要分布在上游河源区及海拔较大的中部地区,城乡用地及耕地主要分布在河流两岸及下游地区;1980—2010年,由于经济社会发展以及城市扩张,耕地逐渐减少,林地、草地、水域有略微的减少,且基本转化为城乡用地,城乡用地逐渐从下游向上游河源地区扩展,其中,2005—2010年各土地利用类型变化最为剧烈,其综合动态度为0.49%;2010年以来,南部山区禁止一切与水源保护、生态保护无关的建设活动。2010—2015年,只有水域面积存在明显变化。2015—2020年各土地利用类型基本保持稳定,城市扩张速度得到了减缓。经济社会发展是引起城市快速扩张的重要原因,积极的保护政策有利于南部山区生态格局的优化和生态环境改善。

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。

宁夏南部山区植被覆盖度变化及其地形因子相关性分析

以宁夏南部山区为研究区,基于Landsat影像,运用改进的像元二分模型估算1996、2008和2018年3个时相的植被覆盖度,用数字高程模型提取坡度、坡向等地形因子,分析研究区植被覆盖度的变化以及与地形因子的相关性。结果表明:研究期间,研究区植被覆盖度呈现显著增加,尤以高植被覆盖度为甚。总体来看,高程在2400 m以下的植被覆盖度随高程增加呈现上升趋势;随坡度增加,植被覆盖度呈现上升趋势;1996和2018年2个年份的植被覆盖度在各坡向差异不大,但是2008年植被覆盖度有较明显的差异,变化趋势为阴坡>半阴坡>半阳坡>阳坡。

武威南部浅山区马铃薯新品种比较试验初报

马铃薯生产中存在品种多、乱、杂的问题,是目前制约武威地区马铃薯产业发展的主要原因。为筛选出适宜武威南部马铃薯主产区种植的优质高产抗病马铃薯品种,解决武威地区马铃薯品种退化、抗病性减弱、产量低等问题,对引进的11个马铃薯新品种在武威南部浅山区进行了品种比较试验。结果表明,中晚熟马铃薯品种青薯9号和中熟马铃薯品种希森6号具有良好的适应性、丰产性和较好的抗病性,折合产量分别为61239.0、55861.5 kg/hm^(2),较对照品种陇薯10号分别增产21.91%、11.20%,可以作为当地主栽品种陇薯10号的替代品种在武威市南部浅山区马铃薯主产区推广。

陕南中低海拔山区植物物种多样性与海拔及坡向的关系

为了研究陕南中低海拔山区植物物种多样性与坡向、海拔之间的关系,在研究区内设置并选取了具有代表性的样方91处,统计分析了每150 m海拔区间内乔木层、灌木层、草本层物种多样性及其关系。结果表明:(1)研究区内共有维管束植物129科、312属、460种;阴坡乔木、灌木、草本植物的物种数均多于阳坡;相同坡向内草本植物的科、属、种数量最多,灌木次之,乔木最少。(2)除草本植物的H、D值外,其他层次物种多样性指数的变异系数阴坡均大于阳坡;阳坡海拔1250 m以上草本植物物种数逐渐降低,优势种逐渐显现;在阴坡,海拔500—650 m处草本植物物种数最多,而海拔1400—1550 m灌木的个体数量最多。(3)回归分析中,多样性指数与海拔之间大多能呈现较好的拟合效果。阴、阳坡向内乔木层的多样性指数均先降低再升高,海拔950 m以上,阴坡乔木层的H、M值大于阳坡,差异显著(P<0.05);而D、J值差异不显著。阴坡灌木层的H、J、M值在海拔800 m处呈现单峰格局;阳坡灌木层的H、M值在研究区域内单调升高,而J值与海拔之间没有很好的拟合效果。在研究区内,阳坡草本层的H、J、M值随海拔升高呈现先增加再降低趋势,而阴坡草本层各指数与海拔之间没有很好的拟合效果。(4)不同层次间相关性检验中,阳坡乔木层H值与灌木层的H、D、M为显著负相关(0.01<P≤0.05),乔木层的J值与灌木层的J值、灌木层的J值与草本层的J值为显著正相关(0.01<P≤0.05);阴坡灌木的多样性指数与草本层各指数(D值除外)多呈显著或极显著正相关;其他相关性均达不到显著水平。(5)阳坡的种间共同出现率的峰值位于海拔800—950 m、950—1100 m的两个区间内,最低值在海拔1100—1250 m、1250—1400 m两个区间内。阴坡的峰值海拔比阳坡峰值海拔高100—400 m,而最低值所处的海拔区间与阳坡相同。

宁南山区杏园三种食心虫种群发生动态

为掌握宁南山区杏园食心虫发生规律,2018年和2020年采用性诱监测方法对彭阳县杏园梨小食心虫、桃小食心虫和李小食心虫成虫种群动态进行了系统监测。结果表明,宁南山区杏园梨小食心虫成虫田间发生期为4月上旬至9月中旬,发生高峰分别为4月底至5月初、5月下旬初和6月中旬末至下旬初,7月上旬后零星发生,无明显峰期。不同坡向虫口数量分布呈现东坡>南坡>西坡,不同坡向的上、中、下坡位虫口数量均以中、下层坡位分布为主。桃小食心虫成虫发生期为5月中旬或下旬至8月下旬或9月初,发生高峰分别为6月上旬或中旬初和7月中旬或下旬;李小食心虫成虫发生期为5月上旬至9月上旬,发生高峰分别为6月上旬、7月上旬和8月上旬。宁南山区对杏园3种食心虫防治可以采取以农业防治为基础,优先采用理化诱杀和生防技术,大发生时加强药剂适期防治的综合防治策略。

皖南丘陵山区油菜生产机械化现状与建议

油菜是我国重要的油料作物之一,食用植物油的最主要来源。安徽省是全国油菜主产地之一,有沿江和江淮两大集中优势产区,2023年全省油菜种植面积46.97万hm^(2)。种植模式和生产特点导致油菜机械化生产难度大,尤其是种植和收获2个环节机械化率较低。皖南丘陵山区由于地理条件、种植模式、机械装备、生产规模、经营模式等制约因素,影响了油菜生产机械化发展。需要从多方面着手,提高油菜生产机械化水平,从而提升作业效率,降低生产成本,增加农户收益。

从《杨辉算法》看南宋区域农业经济史的两个侧面

《杨辉算法》是南宋后期杨辉所编撰的一部算学著作集,该著以算题形式为我们保存了当时台州地籍的一些原始资料。因此,我们可以通过这些算题对南宋后期整个江浙丘陵地区的农业生产状况作一粗略估计,尤其是根据民间粮食交易的客观需要,杨辉还对“方斛”或“方积”与“圆斛”或“圆积”之间的数量关系进行了换算,从而为不同形制的量斛制造提供了科学依据。杨辉作为南宋晚期一名应用数学家,以数理科学为工具,对南宋市井民量进行大胆改造,从而使当时民间商品交易更趋于公平合理,这种力行实践的科学精神值得肯定。

垄作模式与种植密度互作对露地花椰菜生长的影响

为确定花椰菜在宁南山区露地栽培的最佳作畦模式和种植密度,设置2个不同作畦模式(2行、3行;分别编号为T、N)和3个不同种植密度(2500、3000、3500株/667 m^(2);分别编号为1、2、3)的双因素试验,比较分析不同作畦模式与密度对花椰菜植株生长、产量和品质的影响。结果表明,花椰菜生长、产量及品质指标在不同作畦模式及种植密度处理下有所不同;株幅、花球质量、花球横径、中心柱高在2行作畦且密度在2500株/667 m^(2)时最优;可溶性蛋白含量在2行作畦且密度在3000株/667 m^(2)时最优;叶片数、花球纵径在3行作畦且密度在2500株/667 m^(2)时最优;株高、外茎高、产量、维生素C含量、可溶性固形物含、可溶性糖含量在3行作畦且密度在3000株/667 m^(2)时最优。综合考虑花椰菜植株生长、产量及品质指标,主成分分析最终排名N2>T2>N3>N1>T3>T1,2行和3行作畦且密度在3000株/667 m^(2)时排名前2,且3行作畦、种植密度在3000株/667 m^(2)时效果最好,可作为宁南山区露地花椰菜高产高效栽培参考。

塔北隆起西部地区白垩系碎屑岩油气成藏规律及成藏模式

以岩心观察、物性分析、地球化学分析和三维地震资料为基础,通过单井、连井沉积相分析、地震精细解释及优势砂体识别等方法,从油气来源、油气充注特征、输导体系及储盖组合等4个方面对塔北隆起西部地区白垩系碎屑岩油气成藏规律及模式进行了研究。研究结果表明:(1)研究区白垩系油气具有“陆源”特征,石油主要来自库车坳陷三叠系湖相烃源岩,天然气主要来自库车坳陷侏罗系煤系烃源岩,区内深部三叠系海相烃源岩贡献极小。(2)研究区白垩系油气充注持续时间长,成藏时期晚,早期生油,晚期生气,油成藏于中新世(4.0~22.0 Ma),气成藏于晚中新世—中上新世(3.5~11.0 Ma),受2.6~3.5 Ma构造隆升影响,气藏成熟度较低。(3)研究区油气输导体系较发育,天山南地区以断裂和不整合面作为主要运移通道;顺北地区以不整合面和巴西改组薄层砂体为运移通道。(4)研究区储层主要发育在舒善河组和巴西改组,含砂率一般高于60%,与其上部发育的连续泥岩构成良好的储盖组合;优质储层的分布受沉积相控制,天山南地区优质储层主要分布在扇三角洲前缘砂坝及滩坝,顺北地区优质储层主要分布在辫状河三角洲前缘朵体,目前探井未钻遇朵体最高部位,油气显示相对较差;顺北地区储层物性更佳。(5)研究区天山南与顺北地区因断裂活动强度及储盖组合特征存在差异造成了二者的油气藏类型不同,前者以低幅度构造、构造-岩性复合油气藏为主,后者以规模较小的岩性油气藏为主。

宁南山区侵蚀沟不同部位土壤理化性质及可蚀性研究

侵蚀沟沟头前进,沟岸扩张,沟床下切严重影响区域粮食生产和环境质量。以宁夏彭阳县玉洼流域3个稳定侵蚀沟的沟头、沟床、沟岸为对象,通过野外调查取样与室内试验相结合的方法,分析了侵蚀沟不同部位(沟头、沟床、沟岸)的土壤理化性质及可蚀性K值,采集0—10,10—25,25—40,40—55,55—70 cm土壤,测定并计算土壤质量含水量(θ)、土壤容重(ρ)、土壤总孔隙度(φ)、土壤黏粒(CLA)、粉粒(SIL)、砂粒(SAN)含量、>0.25 mm水稳性团聚体含量(R 0.25)、土壤平均重量直径(MWD)、土壤几何平均直径(GMD)及土壤有机质(SOM)含量,利用EPIC模型计算土壤可蚀性K值。结果表明:(1)侵蚀沟各部位平均质量含水量、总孔隙度、有机质、粉粒含量、>0.25 mm水稳性团聚体含量、平均重量直径、几何平均直径的大小顺序均为沟床>沟岸>沟头,各部位平均土壤容重、砂粒含量为沟头>沟岸>沟床,平均土壤黏粒含量为沟岸>沟头>沟床,各部位土壤机械组成均为粉粒含量>砂粒含量>黏粒含量;(2)侵蚀沟各部位土壤可蚀性K值在0.0329~0.0395(t·hm^(2)·h)/(MJ·mm·hm^(2)),属于中可蚀性,平均可蚀性K值表现为沟头>沟岸>沟床;(3)侵蚀沟各部位土壤可蚀性K值与土壤粉粒、黏粒含量呈显著负相关,与土壤砂粒、有机质含量、质量含水量呈显著正相关,沟床土壤可蚀性K与R 0.25、MWD、GMD呈极显著负相关(p<0.01)。沟头作为侵蚀沟发育最活跃的部位,通过提高土壤有机质含量、粉粒含量来增加团聚体的数量和稳定性,从而降低土壤可蚀性。研究结果可为侵蚀沟生态稳定性及评估提供依据。