池塘淡水养殖水质模糊综合评价系统的设计与实现   总被引：2，自引：0，他引：2  

王瑞梅  傅泽田  何有缘 《安徽农业科学》2010,38(32):18007-18010

以池塘淡水养殖水质为研究对象,在综合分析池塘水质各影响因子的基础上,通过专家问卷调查法和德尔裴法对水质因子的重要程度进行了排序,建立了池塘水质评价指标体系和评价标准,用重要程度法和实测值相对隶属度法确定了指标权重,建立了池塘水质模糊综合评价模型,并设计和实现了淡水池塘养殖水质模糊综合评价系统。将该系统应用于某企业淡水养殖池塘水质的评价,取得了较好效果。  相似文献   

池塘养殖加料车设计     

吴迪  保冶君  张丽珍  胡庆松  何睿杰  李旗明 《上海海洋大学学报》2023,32(5):911-922

针对目前池塘养殖中投饵机大部分加料都是依靠人力完成,劳动强度大,在陡峭斜岸上对投饵船进行加料困难的现状,设计一种无动力出料的节能定量加料车。加料车使用旋转下料阀进行定量下料,使用剪叉式升降平台调整加料高度。通过设计位于下料阀出料口的球形限位旋转连接件调整加料管的倾角实现无动力出料。基于圆柱凸轮设计新型伸缩加料管。加料车通过车体的移动、剪叉式升降平台的升降、加料管倾角和长度的调整实现定向、定距、定点的饲料添加。制作加料车样机,以投饵船和固定式投饵机为加料目标进行加料试验,试验结果表明加料车对不同规格饲料具有通用性,1.2 m的伸缩长度和1.5 m的升降高度能满足投饵船和固定式投饵机的加料需求,调整灵活,加料速度为6.2 kg/min。设计的加料车使用灵活,能代替人工给投饵船和固定式投饵机加料,减轻人工劳动强度,提高养殖过程的机械化水平,为进一步实现自动化和智能化打下基础。  相似文献   

Texture and chemical composition of soils from shrimp ponds near Choluteca, Honduras     

Prasert Munsiri  Claude E. Boyd  David Teichert-Coddington  Ben F. Hajek 《Aquaculture International》1996,4(2):157-168

Analyses of bottom soils from three recently-established (newer) and three older ponds on each of two, semi-intensive shrimp farms near Choluteca, Honduras, revealed that the 0 to 2.5 cm layer had greater concentrations of most variables than deeper layers. Concentrations of total carbon, nitrogen, sulphur, phosphorus, calcium, iron, manganese, and zinc were greater in older than in newer ponds on one or the other of the farms. After 8–11 y of continuous production, total carbon concentrations varied over pond bottoms, and concentrations usually were greatest (1.5–2.5%) in inlet sections. Nitrogen concentrations were about 20% those of carbon and changes in nitrogen concentration closely followed those of carbon. Precipitation of iron pyrite (FeS₂) in anaerobic soil layers was the apparent cause of sulphur accumulation in older ponds. Phosphorus accumulated in older ponds on the farm where heavy doses of fertilizer were applied. Soils of both older and newer ponds on both farms had large accumulations of major cations, a large portion of which were water-soluble salts. There was no evidence of development of adverse soil quality in older ponds.  相似文献   

Evaluation of Lime Requirement Procedures and Liming Materials for Aquaculture Ponds in Thailand     

《Journal Of Applied Aquaculture》2013,25(3):77-88

Abstract

There were strong correlations between soil pH and pHof water (R² = 0.810) and total alkalinity (R² = 0.724) in laboratory soil-water systems prepared with acidic rainwater and pond soil samples from Thailand. Moreover, water pH and total alkalinity were highly correlated (R² = 0.987). Although soil carbonate concentration was not correlated with total alkalinity, there was a correlation between the product of soil carbonate and soil organic carbon and total alkalinity (R² = 0.482). Other soil properties, exchange acidity, cation exchange capacity, base saturation, and total sulfur, were either not correlated or weakly correlated with total alkalinity. Total alkalinity did not exceed 20 mg/L except in systems with soils containing free carbonate. A method that estimates the amount of liming material needed to completely base-saturate bottom soils and provides an excess of carbonate, should be used in Thailand and other places. Calcitic agricultural limestone gave higher total alkalinity concentration in soil-water systems than dolomitic agricultural limestone. There usually would be no justification for selecting higher-priced dolomitic limestone for use in ponds.  相似文献   

池塘养殖水体净化修复技术研究进展   总被引：2，自引：0，他引：2  

梁福权  朱文聪 《安徽农业科学》2012,40(35):17150-17153

概述了池塘水体净化修复技术的研究进展,重点介绍了物理修复、化学修复和生物修复在养殖水体净化等方面的应用情况,并对其发展和应用前景进行了阐述。  相似文献   

古莲花池十二景题名解析     

果治  段艳霞  杨玉梅  魏汉朝 《安徽农业科学》2012,40(8):4676-4677,4838

以古莲花池十二景为研究对象,对春午坡、藻泳楼、篇留洞、含沧亭、高芬阁、万卷楼、花南研北草堂、寒绿轩、宛红亭、鹤柴、绎堂、蕊幢精舍12处景点进行了介绍,依据相关文献中所采用的指称符号命名法、语言修辞命名法、记事状物命名法、言情述志命名法,对莲池十二景的命名进行分类,并从中总结了莲花池景名的文化内涵,解析了含沧亭和高芬楼所蕴涵的儒家和道家思想。研究旨在通过对景点命名所包含的特点含义的解析,启迪现代园林工作者,使其在园林命名工作中受到相关启发。  相似文献   

硫酸铜防治绿藻试验   总被引：1，自引：0，他引：1  

熊自立  王法格  张淑东  谢拾冰  饶立兵 《长江蔬菜》2002,(1):42-43

立柱式盆钵水培蔬菜极易滋生绿藻，本试验采用不同浓度的CuSo4溶液控制绿藻的生成和减少绿藻的发生取得了初步成效。试验结果表明，可在大棚生产空闲时期用0.5%CuSO4溶液杀死绿藻，但CuSo4溶液不能作为生产用水以免对蔬菜产生药害。  相似文献   

中国对虾在池塘中生长特性的研究   总被引：4，自引：0，他引：4  

胡品虎  唐天德 《水产养殖》1995,(4):18-21

根据池养对虾生长情况的现场测量数据，通过回归分析求得体长及体重的生长方程式分别为：Ｌｔ＝１４．０７３３［１－ｅ＾－０．１４０３（ｔ－０．８３５０）］和Ｗｔ＝３３．４４７９［１－ｅ＾－０．１４０３（ｔ－０．８３５０）］＾３，体重生长曲线的拐点ｔ＇＝８．７。对虾在池塘中的实际生长速度由于受池塘生态环境及鲜活饵料供应的季节性变化等因素的影响，分别在７月上旬、８月上旬及９月中旬出现三次生长高峰。适当减少高  相似文献   

池塘培育大眼狮鲈鱼苗、鱼种的试验     

王志远  张志华等 《水产学杂志》1994,7(2):13-16

哈尔滨市水产研究所于1993年5月24日从加拿大FortQu′Appelle鱼苗孵化场移运大眼狮鲈鱼发现鱼卵，经孵化后孵出鱼苗14万尾，在池塘中培育。鱼苗阶段培育36天，体长53．9mm，成活率75％；鱼种阶段经95－100天培育，套养的鱼种体长20－22．5cm，体重83－107．4g，单养的鱼种体长17．5cm，体重48．4g。  相似文献   

Fish larvae – zooplankton relationships in microcosm simulations of earthen nursery ponds. I. Freshwater system     

Ana Milstein  Arie Valdenberg  Sheenan Harpaz 《Aquaculture International》2006,14(3):231-246

To address the commercial nurseries problem of obtaining enough zooplankton of adequate species composition and size when fish larvae start to feed, a simulation of the effects of predation intensity on zooplankton composition in freshwater nursery ponds was carried out in an experimental system of twelve 130-liter containers. Treatments consisted of two densities (1 or 2 larvae l⁻¹) of common carp stocked on the 4th day after filling the containers and a control without fish. Zooplankton–environment relationships were explored using factor analysis. Several groups of zooplankters that respond in different ways to fish larvae predation pressure were identified. The first factor was a general measurement of zooplankton abundance that mainly reflects allochthonous rotifer species that entered the system with the filling water, replaced in time by autochthonous species that hatched from resting eggs in the sediment. The second factor identified the direct effects of size selective fish predation, and the third showed indirect effects of high fish density. Larvae growth rate matched the plankton availability: high just after stocking, when they fed on the abundant but declining numbers of allochthonous rotifers; then decreased drastically and increased again when hatching of resting eggs of autochthonous rotifers and the availability of the crustacean preys preferred by the fish, increased. It was concluded that in commercial nurseries increased larvae production can be achieved just by stocking fish earlier than the 4th day after pond filling, to match the rotifer peak.  相似文献