湛江市公园绿地花境应用及配置调查

针对湛江市主要公园绿地的花境植物应用及配置模式进行了实地调查,以期了解粤西地区花境应用现状及配置特色。结果表明:目前湛江市应用于花境的植物共99种,隶属于46个科84个属;配置模式根据花境立地环境划分主要有林缘花境、路沿花境、临水花境、建筑物周围花境、草坪花境等。并对花境植物应用及花境配置等方面存在的问题进行了探讨。     

湛江市主要街道绿化调查研究

对湛江市几条主要街道椹川大道、军民路、机场路、海滨大道、人民大道等绿化情况进行了调查研究,主要内容包括街道的绿化形式、绿地率、绿化的立体结构等.旨在通过对几条主要街道绿化调查结果的分析,总结湛江市街道绿化的优缺点,为湛江市争创国家生态园林城市提供理论依据.     

湛江市攀援植物的调查及应用研究

攀援植物是城市绿化中的重要组成部分,本文对湛江市13个公园、居民区的攀援植物资源种类、应用现状进行了调查与分析。结果表明,该区攀援植物约有40科67属78种,绿化的形式有棚架式、柱体式、附壁式、篱垣式、假山置石式和护坡、地被绿化。并结合了湛江市攀援植物在园林绿化中的特点及应用,指出了湛江市攀援植物应用存在的问题,并提出了解决建议。     

湛江市古树名木衰退原因及保护措施探讨

通过对湛江市现存古树名木的品种、数量进行实地调查,分析湛江市古树名木衰退的主要原因,针对现状提出相应的保护措施。     

广东湛江市6种落叶乔木的生长习性及园林应用

阐述湛江市木棉、美丽异木棉、凤凰木、榄仁、小叶榄仁、大花紫薇6种落叶乔木的生长习性,总结其观赏价值和园林应用特点,并提出应用和保护湛江市落叶乔木的建议。     

湛江市多色花境色彩美景度的评价与分析

花境作为一种新的设计形式,广泛应用于城市绿地中,极大地丰富了城市景观的色彩。本文主要以湛江市机场路入口、银帆公园、中澳友谊花园、渔港公园等18处的多色花境为研究对象,对其进行美景度分析,经研究结果表明:湛江市可用于花境的植物有61种,涉及36个科59个属。美景度评价后,样本SBE值排前4的分别为粉紫黄色系、紫红白橙、紫粉红、白粉红黄色系的花境,同时,提出相对应的植物品种,以期为未来湛江市花境设计提供一定的参考。     

湛江市景观风貌规划探析

新时期下,湛江市需要对城市形象进行重塑,形成具有时代精神和城市特色的空间形象,促进城市可持续性发展。立足湛江的实际情况,对湛江市的景观风貌规划设计问题进行了分析和探讨。     

园林文化 魅力湛江——2019岭南盆景艺术博览会成功举办

<正>为展现园林文化,打造魅力湛江,弘扬岭南盆景艺术,由湛江市城市综合管理局主办,广东省盆景协会、湛江市科学技术协会、岭南盆景网站指导,湛江市寸金公园、湛江市盆景协会承办的"园林文化·魅力湛江"2019岭南盆景艺术博览会2月1日至2月20日在湛江市寸金桥公园文化广场举办。2月1日上午,2019岭南盆景艺术博览会盛大开幕。广东省盆景协会会长黄远颖,终身名誉会长谢克英,秘书长邓孔佳,常务副会长何伟源,副会长、粤西盆     

棕榈植物在湛江市绿地的应用调查

通过实地考察寸金公园、南国热带花园、海滨公园、湖光岩、中澳友谊花园、渔港公园等公园和绿地,对湛江市目前园林绿化中应用棕榈科植物的种类、植物配置现状进行了调查与分析。结果表明,湛江常见的棕榈植物有22属38种,主要配置方式有孤植成景、列植成行道树、群植混植为棕榈园、与山石组合成景等。     

湛江园林绿化树种应用现状及对策

调查发现，湛江市园林植物主要应用了高山榕、麻楝、含笑、白兰、桂花、大王椰子、椰树、假槟榔、凤凰木和羊蹄甲等品种，本地乡土植物应用较少。而乡土植物作为本地的优势植物，经过漫长的自然选择，对本地的气候、土壤适应性强，生长良好，在改良土壤、净化空气、改善生态环境和小气候等方面均优于外来树种。因此建议遵循生态性原则，着重发挥乡土植物的应用价值，注重生物多样性。     

Effects of Tongxinluo on activation of platelet in rabbit model of atherosclerosis

AIM: To study the effects of Tongxinluo on the activation of platelets in a rabbit model of atherosclerosis. METHODS: New Zealand rabbits were randomly divided into 7 groups: normal group, model group, the groups treated with high, medium and low doses of Tongxinluo micropowder (0.15, 0.3 and 0.6 g·kg^-1·d^-1), atorvastatin group (2.5 mg·kg^-1·d^-1), and aspirin group (12.5 mg·kg^-1·d^-1). The rabbits in normal group was fed with common diet for 12 weeks, and the rabbits in model group were fed with high-fat diet for 12 weeks to establish atherosclerosis model. The rabbits in the rest groups were treated with the corresponding drugs, at the same time to give high-fat diet. Fasting for 12 h after the last treatment, whole blood was collected to perform the blood routine test, and to measure serum and plasma levels of lipids, platelet factor 4 (PF4) and soluble CD62P (sCD62P). Flow cytometry was used to analyze platelet calcium ion concentration. Electron microscopy was used for platelet superfine observations, and light microscopy for observing the pathological changes. RESULTS: Compared with normal group, the levels of triglyceride (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), platelet counts, and mean platelet volume in model group were significantly elevated, and the levels of PF4, sCD62P and calcium were also significantly increased (P < 0.05). Compared with model group, except aspirin group, the levels of TG, TC and LDL-C in high, medium and low doses of Tongxinluo groups and atorvastatin group were effectively decreased. The platelet counts and mean platelet volume in all treatment groups were markedly decreased, and the serum levels of PF4, sCD62P and Ca²⁺ in platelet (P < 0.05) were reduced. In electron microscopic observation, the shape of platelet was regular and organelles distributed uniform in normal group. However, in model group, the shape of platelet was irregular, pseudopodia forming was obviously observed, and α particles and dense granules decreased, indicating that the platelet was activated. To a different extent, the platelet shape, increase in the number of α particles and dense granules were improved in treatment groups and the damage of the cytoplasm was attenuated. Through histopathological observation, the intimal was smooth and complete in normal group. In the model group, the intimal thickness markedly increased, foam cell aggregated, and plaque was formed. Compared with model group, the intimal thickening and the number of foam cells were significantly decreased, and plaque formation was not obvious in atorvastatin group and high dose of Tongxinluo group. The pathological damages in the other treatment groups were alleviated in different degrees. CONCLUSION: Tongxinluo significantly inhibits the activation of platelets in the process of atherosclerosis, and has important clinical value to delay the atherosclerotic thrombosis.     

枣黄化根蘖苗成因分析

为了探究枣黄化根蘖苗的成因,对其黄化根蘖苗、正常根蘖苗和母株之间的形态学指标、叶绿素及矿质元素含量和相关基因表达水平进行了分析。结果表明,与正常植株比,黄化根蘖苗形态学指标没有明显变化,但叶绿素含量及叶绿素a/b比值显著降低,矿质元素N、P、K、Mn、Cu、Zn、Fe含量显著增高,但Ca和Mg差异不显著。同时,AFLP分析表明,黄化根蘖苗与正常植株在基因组水平没出现显著差异;但cDNA-AFLP和RT-PCR分析表明在转录水平上,黄化根蘖苗中酰基转移酶基因表达增加,Ty3-gypsy反转录转座子基因和GAGA结合转录激活因子基因表达降低。综合分析认为,枣根蘖苗的黄化可能是与叶绿素合成转录相关的反转录转座子和GAGA结合转录激活因子基因表达降低,影响了叶绿素合成,使植株最终表现黄化;同时黄化植株中与光呼吸相关的一些基因,如酰基转移酶基因表达相应增加以适应这种逆境胁迫,说明这些基因间存在着相互适应的调控网络。     

DTOPSIS法在结球甘蓝适应性综合评价中的应用

为筛选适宜在陕西太白高山冷凉地区种植的结球甘蓝品种,为该地区结球甘蓝品种的种植和推广提供科学依据,考察了15个结球甘蓝品种的植物学性状和产量水平,用逼近理想解的排序法(DTOPSIS法)对株幅、叶球纵径、叶球横径、中心柱高、单球质量等主要性状指标进行综合评价。试验结果表明,运用DTOPSIS法得出各理想解相对近似度(Ci)的最高值为0.7072、0.6739、0.6220,对应的品种分别为威风01、CR-绿崎、中甘596,其球形圆正、品质较好、结球紧实、产量高、商品性好、抗抽薹,适合在太白高山冷凉地区种植。     

三种类型越橘根系垂直分布特征研究

调查了7 a生北高丛越橘、半高丛越橘、矮丛越橘在辽南地区棕壤条件下根系垂直分布特征。结果表明:根系生物量以高丛越橘、半高丛越橘较大,矮丛越橘较小;不同径级根系生物量占总生物量的比例以1～3 mm的根系最大,其次为≤1 mm的根系,大于3 mm的根系所占比例较小;根长密度以北村、斯卫克、康维尔较大,北陆、美登较小;不同径级根系根长密度占总根长密度的比例以≤1 mm根系最大,其次为1～3 mm的根系,大于3 mm的根系所占比例较小;5个越橘品种根系生物量和根长密度垂直分布深度在30～40 cm以内,主要分布在0～20 cm土层中,其中康维尔和北村集中分布在0～10 cm土层中,美登集中分布在10～20 cm土层中,北陆和斯卫克在0～20 cm土层内分布相对较为均匀。     

蚯蚓对苹果园土壤生物学特性及幼树生长的影响

 以果园褐土、潮土和棕壤以及2年生红富士苹果(Malus domestica Borkh. ) 幼树为试材, 在盆栽条件下, 通过向盆土埋放蚯蚓, 研究蚯蚓对土壤酶、土壤微生物量碳和氮以及苹果根系和新梢生长的影响。结果表明, 引入蚯蚓后, 3类土壤中脲酶、酸性磷酸酶和碱性磷酸酶活性以及微生物量氮均显著提高, 其中棕壤脲酶活性提高78.9% , 潮土碱性磷酸酶活性提高170.0% , 棕壤微生物量氮提高180.4%。蚯蚓处理也显著提高褐土和潮土微生物量碳, 其中潮土微生物量碳提高幅度最大, 达299.2%。3类土壤经蚯蚓处理后, 苹果幼树根系活力、根系和新梢生长量均显著提高, 其中, 棕壤中的幼树根系活力最高, 褐土中的幼树根系生长量最大, 潮土中的幼树新梢生长量最大。     

Influence of transection of the cervical sympathetic trunk on content of NO and expression of NOS in placenta of rats with pregnancy-induced hypertension syndrome

AIM:To observe the influence of transection of the cervical sympathetic track (TCST) on the content of NO and the expression of eNOS mRNA and iNOS mRNA in placenta of the rats with pregnancy-induced hypertension syndrome (PIH).METHODS: Pregnant Wistar rats were randomly divided into 5 groups: control group (C): saline was injected subcutaneously from 14th day to 20th day of gestation;PIH group 1 (H1) and group 2 (H2): L-NAME was respectively injected with 125 mg/kg and 62.5 mg/kg,respectively,then the other procedures were the same as group C;Operation group (O): TCST was operated on 14th day of the gestation,then the other procedures were the same as group H1;sham operation group (S): the cervical sympathetic trunk was only separated and exposed on 14th day of the gestation,then the other procedures were the same as group H1.RESULTS: (1) Except the base value of the BP and protein in urine of the pregnant rats,all the parameters observed in group H1 and H2 were higher than those in group C significantly (P<0.01),and in group H2 were lower than those in group B1 markedly (P<0.01).(2) In comparison with those in group C,the size and body weigh of fetus in group H1,H2 decreased markedly (P<0.01).The above indexes in group H1 were lower than those in group H2 markedly (P<0.01,P<0.05).The changes of the rate of embryo absorption and fetal death,and deformity rate of the fetal rats were contrary to the above indexes.(3) The content of NO and the expression of eNOS mRNA and iNOS mRNA in placenta in group H1 and H2 were lower than those in group C markedly (P<0.01).Those in group H1 were lower than those in group H2 obviously (P<0.01,P<0.05).Those in group O were higher than those in group H1 markedly (P<0.01).CONCLUSION: TCST protects pregnant rats against PIH,and it was related to the mRNA expression of eNOS and iNOS and the content of NO in placenta tissue.     

三种油橄榄叶片中多酚含量的季节动态变化研究

通过对西昌市北河地区的佛奥、配多灵、尼肖特油橄榄品种上、中、下部位叶片多酚含量的测定,研究3种油橄榄品种不同部位及整株叶片多酚含量的季节动态变化规律。结果表明:3种油橄榄叶片多酚含量在2008年各季节都呈逐渐减少的趋势,叶片多酚含量均以3月最高;其中尼肖特叶片中多酚的含量全年最高;其次佛奥叶片多酚含量较好,全年稳定,植株各部位叶片多酚含量相差较小;配多灵叶片中多酚含量较低,且全年不稳定。     

2022年河北省主要蔬菜价格波动分析

依据全国农产品商务信息公共服务平台和布瑞克农业数据终端数据,从整体菜价、近5年菜价、省际价格对比及分品种菜价等角度出发,对15种主要蔬菜进行纵、横向比较分析,并对5种典型蔬菜进行重点分析。结果显示：2022年河北省蔬菜价格同比降幅明显;与全国和山东省相比,河北省蔬菜价格水平偏低;在蔬菜单品中,黄瓜和番茄价格波动剧烈。综合分析表明,种植规模、季节性因素、供求关系和恶劣天气是造成2022年河北省蔬菜价格频繁波动的主要因素。     

香菇菌糠作栽培基质对番茄幼苗生长的影响

以香菇菌糠为基本栽培基质,将其分别与土壤、煤渣和珍珠岩等混合,研究在干旱胁迫下不同基质配比对番茄幼苗期生长的影响。结果表明:不同处理下番茄幼苗的萎蔫率大小依次为T3相似文献   

不同贮藏时间的普洱茶香气成分分析

采用顶空—固相微萃取技术提取不同贮藏时间的普洱茶香气成分, 经气质联用分析鉴定, 结果表明, 贮藏30 年、25 年、6 年和当年生产的茶样中, 萜烯化合物及其衍生物含量分别为51.42%、89.15%、74.10%、39.72%。但陈茶与新茶中的萜烯化合物及其衍生物的种类却有明显的不同, 陈茶中以反-丁香烯为主, 在贮藏30年、25年、6年茶样中的含量分别达36.78%、66.98%、56.08% , 而当年生产的样品以愈创木烯为主, 其含量达33130% , 反- 丁香烯含量仅为1102%。与当年生产的茶样相比, 陈茶香气成分种类和含量都较少, 贮藏30年、25年、6年茶样分别鉴定出23、24、22种香气化合物, 而当年生产的茶样共鉴定出36种化合物。