Fengshui forest management by the Buyi ethnic minority in China     

Juanwen Yuan  Jinlong Liu 《Forest Ecology and Management》2009

Fengshui forests, very popular among the ethnic minorities in the rural areas in Guizhou Province of China, have spiritual symbolic meanings and are strictly managed. This paper examines the nature, history, local perceptions and management of fengshui forests in two Buyi villages in the Guizhou Province. With their long history, the fengshui forests are perceived to provide good wishes, security, unity, fortune, wealth and health to the local communities. Fengshui forests act as a form of “community based nature reserve” which maintains the health of natural forests, especially hydrological features and prevention of soil erosion. Cunguimingyue (Folk Regulation and Customs) is the primary local normative mechanism that maintains the fengshui forests in a good condition. The lessons learnt from local fengshui forest management needs to be incorporated in for contemporary China's forest policy formulation as these forests play an important role in rural livelihoods.  相似文献   

北方观赏树木红瑞山茱萸育苗技术     

殷霈瑶  张锡良 《中国林副特产》2009,(4):55-57

红瑞山茱萸耐旱、耐寒，耐修剪，是北方优良的园林观赏树种之一。介绍了北方地区红瑞山茱萸种子繁殖、嫩枝扦插、硬枝扦插及压条繁殖育苗的关键技术。从节床的准备、种子处理、种条选择与种穗的剪切、生根处理、扦插要点、苗期管理等分别进行了阐述。  相似文献   

3种生长调节物质对生菜不定芽直接再生的影响   总被引：3，自引：0，他引：3  

周音  张智奇 《吉林农业大学学报》1998,20(3):31-34

应用“３１１－Ｂ”回归最优设计研究ＡｇＮＯ３，ＡＢＡ，ＡＳＡ对生菜离体培养不定芽直接再生的影响。结果表明，ＡｇＮＯ３是良好的乙烯抑制剂，与ＡＢＡ配合使用可明显抑制愈伤产生，大大促进不定芽的直接再生；而ＡＳＡ未曾抑制愈伤产生，不是乙烯抑制剂。  相似文献   

Study on Metsulfuron-Methyl Degradation in Simulated Wheat (Triticum Asetivum L.) Rhizospheric Soil with Penicillium sp. Inoculation     

Yong Hua He  Dong Sheng Shen  Li Fang Hu  Yin Mei Zhu 《Water, air, and soil pollution》2007,178(1-4):297-307

Weathering of abraded metallic Pb from bullets is a significant source of Pb contamination in shooting range soils. Weathering studies were performed using metallic Pb powder to simulate the fine-size fraction of metallic Pb found in shooting range soils. The effects of soil properties (moisture, organic matter-[OM] and pH) on weathering of abraded metallic Pb were examined by incubating a typical Florida soil for 5 to 12 days at 100% or 80% field capacity (FC) after spiking with 5% metallic Pb, after removal of soil OM at 100% FC, and after adjusting the soil pH to 4.8, 6.1 or 8.5 at 100% FC. The weathering products were examined using X-ray diffraction (XRD). Transformation of metallic Pb to secondary Pb-minerals was more rapid at 100% FC, in the presence of OM, and at lower pH. While little transformation of Pb occurred in the absence of soil OM and mostly litharge (PbO) was found at higher pH, both hydrocerussite and litharge formed at lower pH. A three-step weathering mechanisms of metallic Pb including oxidation, carbonation and dissolution was proposed. Addition of both calcium carbonate and phosphate rock was effective in reducing water-soluble Pb, though the effect was minimal after 11 weeks of incubation, attributing to the liming effect of metallic Pb added to the soil. While reducing soil moisture and organic matter and increasing soil pH slowed weathering of metallic Pb in a soil, the effect of calcium carbonate and phosphate rock on Pb solubility in soils highly contaminated with Pb was limited.  相似文献   

杭州市场茶饮料产品感官品质及理化成分分析     

尹军峰  汪芳  沈丹玉  袁海波  许勇泉  陈建新 《中国茶叶》2007,29(3):21-23

一、试验方法 1．产品收集地点 杭州万家福超市、家友超市、好又多超市：  相似文献   

Analysis of 18S rRNA gene of Octostigma sinensis (Projapygoidea: Octostigmatidae) supports the monophyly of Diplura     

Yun-Xia Luan  Yong-Gang Yao  Rong-Dong Xie  Yi-Ming Yang  Ya-Ping Zhang  Wen-Ying Yin   《Pedobiologia》2004,48(5-6):453-459

The phylogenetic position of Diplura within Hexapoda has been controversial. There are three major lineages in Diplura: Campodeoidea, Projapygoidea, and Japygoidea. However, most of the previous studies were restricted to Campodeoidea and Japygoidea. Until now, only preliminary morphological study on Projapygoidea was reported, and no sequence data from Projapygoidea was available. The main aim of the present study was to investigate the phylogenetic position of Octostigmatidae, one of the three families of Projapygoidea, in Diplura and to test if Diplura are monophyletic. The complete 18S rRNA gene sequences of Octostigma sinensis (Projapygoidea: Octostigmatidae) from subtropical China, together with representative species of Campodeoidea and Japygoidea, and several species of Protura and Collembola were analyzed. The phylogenetic trees were obtained by different methods (neighbor-joining, maximum parsimony, and maximum likelihood) with a chelicerate species as outgroup. Our results suggested that Octostigma was closer to the genus Parajapyx (Japygoidea: Parajapygidae) than to the representative genus of Campodeidae (Campodeoidea). All phylogenetic trees supported the monophyly of Diplura.  相似文献   

添加烟酸铬对生长肥育猪的生长性能、代谢及组织学的影响     

陈强  蔡春标  李建生  黄印尧  董志岩 《福建农林大学学报(自然科学版)》2000,29(4):502-507

将选用的 12 0头杜长大杂交生长肥育猪随机分成 4组 ,3组为实验组 ,1组为对照组 .在实验组的日粮中添加 2 0 0、50 0、10 0 0 μg· kg-1烟酸铬 (以 Cr元素计 )进行为期 2个月的试验 .结果表明 :( 1)试验组日增重比对照组分别提高 11.7%、11.1%和 12 .5% ;料重比分别提高 5.5%、5.6%和 4 .2 % .( 2 )添加 Cr对血清中 K+、Na+、Cl-、总蛋白、白蛋白、脂蛋白及血红蛋白无影响 ( P>0 .0 5) ;血清中 Ca2 +、PO3-4 、尿素氮、尿酸、甘油三酯、胆固醇和血糖含量显著下降 ( P<0 .0 5) ;血清碱性磷酸酶、天门冬氨酸转氨酶、丙氨酸转氨酶含量明显升高 ( P<0 .0 5) ;磷酸肌酸激酶含量显著升高 ( P<0 .0 5) ;而乳酸脱氢酶无明显改变 ( P>0 .0 5) .( 3) Cr含量均未超过国家限量标准 .( 4 )未发现器官的组织结构和细胞形态有何改变 .由此可见 ,在生长肥育猪中添加一定量烟酸铬制剂对猪有积极正面效应  相似文献   

赫章县山区综合开发总体发展战略及其对策   总被引：1，自引：0，他引：1  

郭颖 《四川林勘设计》1999,(4):11-14

本文根据赫章县县情、山情,提出该县山区综合开发的发展战略及对策;并把优先解决粮食安全,改善生态环境,建力林果业、畜牧业及其加工业三大内容作为山区综合开发的建设重点与主导产业.  相似文献   

乳酸菌抗幽门螺旋杆菌感染的研究进展     

付强  殷建忠  吴少雄 《乳业科学与技术》2010,33(2):91-94

综述了近年来对乳酸菌抗幽门螺旋杆菌感染的研究进展,内容包括乳酸菌抗幽门螺旋杆菌感染的机制及应用、乳酸菌抗原递送载体、乳酸菌疫苗等。  相似文献   

谈谈名优绿茶的摊放与设施摊放     

尹军峰 《中国茶叶》2009,31(12):33-34

一、摊放的由来 鲜叶“摊放”一般是指名优绿茶加工过程的首个处理工序。名优绿茶鲜叶的“摊放”概念由来已久，且是在有所争议中发展而来。  相似文献