农村住房和宅基地利用法律问题的初探

我国农村住房和宅基地制度是一种具有中国特色的土地制度,为了保障农民土地使用权的实现,国家出台了一系列法律法规.随着社会经济的不断发展,城乡一体化进程的不断加快,农村住房和宅基地利用问题越来越凸显出来,现行法律法规跟不上农村土地利用形势的发展,法规的不完善造成了资源的闲置浪费和不均等;在司法实践中,农村房屋买卖合同的法律适用问题涉及到宅基地使用权流转的法律难题.农村住房和宅基地利用的制度亟需创新,在科学、合理规划的基础上建立城乡统一的农村住房和宅基地利用制度.     

塘堰养鱼八字精养法

全国农林科技推广工作先进个人、湖北省农业劳动模范、湖北省渔业协会理事、鄂州市水产科学研究所副所长周启才同志,是一位自学成才的农民养鱼技术员。在二十多年的塘堰养鱼实践中,他摸索并积累了一整套行之有效的养鱼经验,被当地农民誉为“鱼博士”。自一九七五年以来,他在一口面积为1.16亩的试验塘里连续10年创造亩产成鱼超千斤以上的高产纪录。去年亩产达到1611斤,今年预计将超过去年水平。在他的具体指导下,沙窝大队133亩塘堰去年平均亩产成鱼也达到808斤,跨入了湖北省塘堰养鱼高产的先进行列。周启才同志将自己养鱼高产的技术措施和管理经验总结归纳为“八字精     

2006年山东猪市回顾

回顾2006年,山东省养猪业经历了猪价低谷期的洗礼和猪无名高热症的考验之后,迎来又一个发展时期.伴随社会猪源的紧缺和需求的增加导致生猪价格一路飞涨,生猪利润值已接近甚至突破2004年最高值.     

法律文秘专业学生实践技能培养初探

高等职业院校法律文秘专业的实践教学体系具有鲜明的高职特色，学生实践技能的培养对专业的生存与发展具有重要的意义，具有适应性、产学一体性、创新性、职业性和规划层次性等特性，学生参与企业日常法律事务的实践活动，技能得到提高，实现了专业培养应用性人才的目标。     

桃漆酶家族基因鉴定及PpLAC21功能分析

利用生物信息技术鉴定了桃中漆酶（LAC）家族成员,分析其进化关系分析、基因结构、启动子区顺式作用元件以及表达模式。结果表明,在桃基因组中共鉴定出48个漆酶基因,通过在桃子叶愈伤组织中的表达模式分析,发现1个表达量很高的关键成员PpLAC21,在该基因沉默的桃愈伤组织中,木质素的含量下降,推测该基因可能参与桃愈伤组织的木质素合成。     

三种多鳞(魚喜)群体的同工酶分析

采用不连续垂直平板聚丙烯酰胺凝胶电泳检测多鳞(魚喜)三个群体的遗传多样性.结果表明,6种同工酶共记录的16个基因座位,其中3个位点是多态的.湛江、阳江、北部湾三个群体的平均有效等位基因数分别为1.05、1.17和1.03.平均实际杂合度Ho分别为0.003、0.167和0.003,平均期望杂合度He分别为0.023、0.093和0.021.湛江和北部湾群体的遗传距离最为接近,与阳江群体的距离较远.3个多鳞(魚喜)群体具有较丰富的遗传多样性,较高的遗传变异水平,对种质资源的研究开发及利用有重要意义.     

Correlation Analysis for Feeding Habits,Morphological Parameters,Weight Parameters and Abdomen Meat Percentage of Procambarus clarkii北大核心CSCD

This experiment was conducted to determine the food source and trophic level of Procambarus clarkii from rice-crayfish field by stable isotope method, and to analyze the correlation between feeding habits, morphology parameters, weight parameters and abdomen meat percentage of P. clarkii. normal (62 individuals) and claw reborned (6 individuals) samples of P. clarkii were collected from the rice-crayfish continuous production field in Zhanjiang. At the same time, vascular plants, snails, as well as diet samples were collected. The stable carbon and nitrogen isotope values of all collected samples were analyzed, the contribution rate of diet, Elodea nuttallii and Potamogeton crispus to the abdomen meat growth of P. clarkii were calculated using a stable isotope mixing model including element concentration, and the trophic levels of P. clarkii and Pomacea canaliculata were calculated by stable nitrogen isotope model. The correlation between stable carbon and nitrogen isotope characteristics (δ13 C and δ15 N) of abdomen meat, morphological parameters (body length, full length, carapace length, carapace width, tail fan length) and weight parameters (body weight, abdomen meat weight, claw weight, claw body ratio) of the collected crayfish were analyzed. The results showed as follows: 1) the collected crayfish included 30 female and 32 male individuals, and the body weight of these crayfish ranged from 3.40 to 29.35 g, average (14.05±6.26) g. The model calculation results showed that diet contributed 63.40% of biomass, 62.28% of carbon and 75.15% of nitrogen to the abdomen meat growth of P. clarkii. 2) In this study, Cipangopaludina cahayensis was used as the baseline for primary consumers, and the calculated trophic level of P. clarkii was 2.20, while the trophic level of P. canaliculata was 2.68. 3) The abdomen meat percentage of P. clarkii (<15 g) collected were extremely negatively correlated with the claw weight and the claw body ratio (P<0.01), indicated that the growth of the claws directly affected the muscle growth of these crayfish. The abdomen meat percentage of P. clarkii (>15 g) were not significantly correlated with the claw weight and the claw body ratio (P > 0. 05), but were extremely positively correlated with the abdomen meat weight and the δ13C value (P<0.01) . It showed that the utilization of diet by these crayfish had become a key factor in determining their abdomen meat percentage. 4) There was a significant negative correlation between the claw weight and the δ13C value (P<0.05) in all collected normal crayfish. It could be inferred that individuals with well-developed claws tend to eat more P. crispus which with lower δ13C value. When the diet was sufficient, the lack of claws did not significantly affect the feeding and growth of P. clarkii (P<0.05) . It is concluded that there are significant correlation between feeding habits, morphology parameters, weight parameters, and abdomen meat percentage of P. clarkii, the diet is the main nutrient source for the abdominal muscle growth of P. clarkii in this study, but even when the diet is sufficient, P. clarkii still feeds heavily on aquatic plants. Traditional methods of stable nitrogen isotope trophic level study may not suitable for aquaculture ecosystems which are strongly influenced by diets. The results of this study can provide basic data for the genetic selection of P. clarkii and the ecological research on the integrated breeding model of rice-crayfish. © 2023 Chinese Journal of Animal Nutrition. All rights reserved.     

现代企业人力资源管理的途径与原则

在分析管理发展历史和在不同文化背景下科学主义与人文精神对东西方管理模式影响的基础上，提出了实施制度化与人性化相结合的管理，应是现代企业进行人力资源管理的途径选择，并认为我国现代企业进行人力资源管理需把握组织化原则，权力平衡原则和权变原则     

立体养殖 循环生产——记养鸭专业户 周代富

湖北省农业劳动模范、鄂州市东沟镇六十村农民周代富,原本是被当地人称为“养鸭精”的专业户,如今,却成了名噪湖北、轰动全军的军民联营养殖场的领头人之一。他开拓出的军民联营共同富裕之路,他探索出的以养鸭为主,种植、养殖、加工、运销、外贸联合经营,立体养殖、循环生产,低成本高效益的生产路子,受到湖北省人民政府、武汉军区和广州军区领导的热情赞扬。周代富的立体养殖、循环生产和军民共富之路,到底是怎么闯出来的呢? 外贸点将逼出养鸭运销联合体 1981年底,鄂城县外贸局主动找到周代富,交给他一个任务:饲养一批菜鸭出口。