共查询到20条相似文献，搜索用时 140 毫秒
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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。 相似文献
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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。 相似文献
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<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 相似文献
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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。 相似文献
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LIU Hong-li LI Hong-rong YIN Yu-jie WEI Geng CHANG Cheng-cheng WANG Hong-tao 《园艺学报》2016,32(6):1106-1111
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. 相似文献
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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。 相似文献
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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。 相似文献
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蚯蚓对苹果园土壤生物学特性及幼树生长的影响 总被引：2，自引：0，他引：2
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。 相似文献
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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。 相似文献
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依据全国农产品商务信息公共服务平台对蔬菜价格的实时监控,从整体菜价、各品种菜价、省际价格对比等角度出发,分析了河北省2022年第一季度15种主要蔬菜价格横向水平及纵向变化趋势以及影响价格变化的因素。结果显示：2022年第一季度河北蔬菜价格持续在较高位波动,各品种蔬菜价格环比、同比升降不一,日均价格波动显著。与各主产省份相比,河北省蔬菜第一季度价格水平均偏低,价格优势明显。天气条件、疫情、汽柴油价格及运输费用上涨是影响河北省蔬菜价格变化的主要因素。 相似文献