蔗渣滤泥培养料栽培平菇试验   总被引：2，自引：0，他引：2  

刘晓波  李海燕  赵鹏  陈朝银 《中国食用菌》2002,21(6):17-18

以不同比例滤泥代替栽培料中的麦麸进行平菇栽培试验。结果表明 ,滤泥能替代栽培料中的麦麸。  相似文献   

滇池底泥菌类组成及与污染关系的研究   总被引：1，自引：0，他引：1  

许传坤  刘艳芳  钱军 《西部林业科学》2004,33(1):89-93

通过对滇池不同位点底泥样品的分析，调查了滇池底泥中固氮菌类、硝化菌类及其他菌类的数量及分布状况。分析了这些细菌参与氮循环与滇池富营养化之间的关系，得出可用底泥中固氮菌作为滇池污染参考指示菌株和滇池地质条件，以及菌类微生物的分布变化对滇池富营养化具重要影响的结论。  相似文献   

杉木苗根系打浆造林效果试验     

林金叶 《福建林业科技》2005,32(2):89-91

杉木苗根系打泥浆后造林不仅能提高造林成活率,而且与当年生幼树的根系地径和树高的生长关系密切,在不同的造林时间或造林后的不同时间,其影响程度是不同的。  相似文献   

泥坑浓香型白酒窖泥中微生物群落结构与多样性分析     

梁欢  许长峰  唐伟斌  任月明 《现代农业科技》2021,3(3)

本文采用Illumina PE250测序法对浓香型新窖泥、老窖泥和品质较好的老窖泥中微生物群落结构与多样性进行研究。结果表明:从门水平结构分析,厚壁菌门与子囊菌门分别为浓香型白酒窖泥的优势细菌与优势真菌;从属水平结构上分析,新窖泥的优势菌属是乳酸菌属,优势真菌属是单端孢属;老窖泥与品质较好的老窖泥优势菌属是乳酸菌属,优势真菌属是青霉属。不同窖龄、不同质量的窖泥微生物结构多样性具有显著差异。  相似文献   

Lipids and fatty acids in wild and pond-reared mud crab Scylla serrata (Forsskål) during ovarian maturation and spawning     

Veronica R Alava  Emilia T Quinitio  Jennete B de Pedro  Flora Mae P Priolo  Zenith Gaye A Orozco  & Mathieu Wille 《Aquaculture Research》2007,38(14):1468-1477

Wild‐caught and pond‐reared female mud crab Scylla serrata at different stages of ovarian maturation were collected from Samar and Capiz, Philippines. Crabs were categorized into five stages according to the external morphological and microscopic appearance of the most advanced oocytes. The ovaries, hepatopancreas, muscle and newly spawned eggs (NSE) were analysed for lipid class components and fatty acids. Total lipid was higher in pond‐reared than in wild‐caught crabs but increased with ovarian maturation in both groups. Ovarian lipid peaked at the fully mature stage, coinciding with a decline in hepatopancreatic and muscle lipids. Lipid levels declined significantly in spent females. The tissues contained elevated highly unsaturated fatty acids such as arachidonic (20:4n‐6), eicosapentaenoic (20:5n‐3) and docosahexaenoic (22:6n‐3) acids, but at higher levels in late maturing and fully mature ovaries and in NSE. The type of lipid class and fatty acid components in mature ovaries as well as in NSE are generally considered to be indicative of their importance in reproductive physiology and embryonic and larval development.  相似文献   

硝酸钙泥与硝酸镁泥磷吸附特性研究     

刘亚楠  卜玉山  吴旋  刘奋武  张吴平 《绿色科技》2014,(3):37-39

对硝酸钙泥、硝酸镁泥两种化工废渣的磷吸附特性进行了研究。结果表明：用Langmuir方程能很好地拟合300℃焙烧后的硝酸钙泥硝酸镁泥和500℃焙烧后的硝酸钙泥硝酸镁泥对磷的等温吸附。300℃、500℃焙烧后的硝酸钙泥、硝酸镁泥的磷最大吸附量分别为37．45、32．36、35．59、28．82mg/g ,表面吸附强度因子分别为1．5615、0．2946、0．2948、0．2882mL/g ,最大缓冲能力分别为58．48、9．53、10．49、8．31mL/g。对磷的吸附效果最好的是300℃焙烧后的硝酸钙泥。300℃、500℃焙烧后硝酸钙泥、硝酸镁泥对磷的去除率达到83％～99％左右。去除率最好的是300℃的硝酸钙泥。  相似文献   

Assessment of dietary lecithin and cholesterol requirements of mud crab, Scylla serrata, megalopa using semi-purified microbound diets   总被引：1，自引：0，他引：1  

M.-H. HOLME  P.C. SOUTHGATE  & C. ZENG 《Aquaculture Nutrition》2007,13(6):413-423

The effects of varying dietary lecithin and cholesterol levels on growth, development and survival of mud crab, Scylla serrata, megalopa were evaluated using six semi‐purified, microbound diets formulated to be iso‐energetic and containing three levels of supplemental lecithin (0, 20 and 40 g kg⁻¹ diet dry weight) and two levels of supplemental cholesterol (0 and 7 g kg⁻¹ diet dry weight). Fifteen megalopa were reared individually in each treatment and the nutritional value of diets was assessed on basis of mean dry weight and mean carapace width of newly settled first crab stage, as well as development time to the first crab stage and overall survival. A significant interaction between supplemental dietary lecithin and supplemental dietary cholesterol was found for final mean dry weight of newly settled crabs, and highest survival (60%) was recorded for megalopa fed diets containing the highest levels of dietary lecithin (39.7–44.1 g kg⁻¹) (diet 5 and 6) regardless of whether diets were supplemented with cholesterol; this rate of survival was identical to that of megalopa fed live Artemia nauplii. The results indicate that supplemental dietary cholesterol may not be essential for mud crab megalopa when fed diets containing sufficient levels of supplemental dietary phospholipids.  相似文献   

Seed production of Charybdis feriatus (Linnaeus)     

Fe D Parado-Estepa  Emilia T Quinitio  & Eduard Rodriguez 《Aquaculture Research》2007,38(14):1452-1458

Some aspects of the reproductive biology of Charybdis feriatus (Linnaeus) were investigated to identify suitable techniques for broodstock management and seed production. Likewise, factors such as ablation, water depth and light requirements affecting survival or reproductive performance were tested. Production of megalops in tanks and juveniles in net cages installed in earthen ponds was conducted. Wild‐caught berried females produced a significantly higher number of zoeae per gram body weight (BW) of the female (3300±600) than captive spawners (867±58). Ablated and unablated crabs spawned after a month and ovaries of both had oocytes in all developmental stages after spawning, indicating that ablation was not necessary. Broodstock survived higher when stocked in 1 m‐deep water and kept in dark conditions compared with shallow (0.5 m depth) water or ambient lighting. There were six zoea and one megalopa stage. Megalops were produced (survival of 2–22% in 1 tonne or 23–55% in 3 L tanks) when methods for the mud crab Scylla serrata (Forsskål) were used, but feeding with Artemia started only at the Z4 stage. Survival of megalops after 1 month was higher when stocked in net cages installed in an earthen pond (32–82%) than when reared continuously in land‐based tanks (5–11%).  相似文献   

Enhancement of white spot syndrome virus load in hatchery-reared mud crab Scylla serrata (Forsskål, 1775) juveniles at a low temperature     

Celia R Lavilla-Pitogo  Leobert D de la Peña  & Demy D Catedral 《Aquaculture Research》2007,38(14):1600-1603

  相似文献   

锯缘青蟹人工繁殖技术     

潘玉敏  蔡恒辉  吕晓民  魏国庆  侯东松  李爱国 《水产科学》2003,22(1):19-21

为了解决南方苗种少的困难及为北方增加新的养殖品种,在北方地区人工繁殖锯缘青蟹,生产苗种大量返销南方。2001年由南方购进待二次产卵膏蟹14只。在室内水泥池培育,抱卵率达42%,幼体成活率达50%。共孵化出幼体13 2万只,平均单位水体出苗(C1-C3)1100只/m3,怀卵量低与二次抱卵蟹卵质量较差有关,幼体死亡率高,主要是蜕皮不遂。  相似文献