准两优608两系杂交稻在海南适生高产示范栽培技术

准两优608是湖南隆平种业有限公司选配的籼型两系杂交晚稻组合,为改变该组合在海南热带生态条件下的适应性生产潜力,2008年冬季2009年春在海南省三亚市警备区农场示范种植0.08 hm~2.经专家现场验收.单产达9.2t/hm~2.实践证明该组合适应性强.在当地种植,表现为株型紧凑、株高适中、穗大粒多、分蘖力一般、千粒重较大、后期落色好、抗逆性强、丰产稳产性好.栽培技术中应坚持适时播种、培育壮秧、小苗移栽、配方施肥、科学管水、综合防治病虫害等.     

Spleen-Specific Development of Germinal Centers in Rats Treated with Antithyroid Drugs

The antithyroid drugs (ATDs) methimazole (MMI) and propylthiouracil (PTU) have been used for treatment of hyperthyroidism for more than several decades, despite the fact that they are associated with adverse drug reactions that are thought to be autoimmune mediated. We therefore examined histopathologic responses in the immune system in male and female rats given MMI (2, 20 and 200 mg/kg/day, p.o., in experiment 1; 200 mg/kg/day, p.o., in experiment 3) or PTU (25 and 250 mg/kg/day, p.o., in experiment 2; 200 mg/kg/day, p.o., in experiment 3) for two weeks. In experiments 1 and 2, highest doses of MMI and PTU induced histopathologic changes in the spleen consistent with those in experiment 3 without any changes in the other peripheral lymphoid organs and tissues. In experiment 3, histopathological evaluation of the spleen along with hematological and bone marrow examinations were performed. In both male and female rats, MMI or PTU induced histopathological changes in the spleen characterized by development of germinal centers and an increase in the number of IgG-positive plasma cells in the red pulp; these changes were most prevalent in the MMI-treated female rats. Total red and white blood cell counts were decreased in the MMI-treated male and female rats; lymphocytes and monocytes were lower in male and female rats, respectively. Bone marrow nucleated cells were significantly lower in the MMI-treated males. This is the first study to demonstrate that ATDs induce spleen specific B-cell reactions in rats     

肉牛高产高效养殖技术示范与推广效果

[目的]为充分体现肉牛高效养殖技术的效果,提高广大散养户及规模场户肉牛养殖技术,生产出符合市场需求的牛肉产品,进而提高综合养殖效益。[方法]从核心示范村和示范户遴选,主导品种推介和主推技术,选聘科技入户技术指导员,落实组织领导,做好科技服务方案的制定,加强宣传技术优势,创新科技入户机制和提升实施效果等角度。进行示范与推广。[结果]显示:科技成果覆盖面达到95.37%,提高产量46.21%,成本降低18.76%,发病率降低5.98%,生产周期缩短27d。[结论]肉牛高产技术推广取得了较为满意的效果。     

生态示范林营造效果初探

通过对建瓯营造13个阔叶树种生态示范林的调查结果表明:酸枣示范林的生长最快,乳源木莲、鹅掌楸、光皮桦示范林生长也较迅速。     

埃塞俄比亚加里农业示范区生态恢复研究

笔者通过对埃塞俄比亚加里农业示范区的现状研究,发现问题并分析了示范区不同景观内部元素的结构与功能的关系。通过运用生态学、造林学、农业与经济等科学原理,论证了生态恢复的可行性。     

从甘薯高产示范种植浅析种植要点

为提高甘薯产能,促使农业增效、农民增收,保障粮食生产安全。本文通过甘薯高产示范种植,科学选种、培育壮苗、深耕起垄、适时栽种、平衡施肥和合理密植等技术措施。结果表明优良的种植品种、合理的种植密度、精细化的管理措施是甘薯优质、高产的关键环节     

一类五次多项式系统无穷远点拟等时中心条件研究

通过同胚变换把系统无穷远点化为原点,研究了一类五次系统无穷远点中心与拟等时中心问题。利用最新算法求出了无穷远点作为中心时的周期常数,给出并证明了这类五次系统无穷远点拟等时中心的条件。     

搞好园区建设加快高新技术产业化进程

10年来，黑龙江省通过农业高新技术园区和国家级农业科技园区建设，加速了传统农业向现代农业转变、粗放经营向集约化经营转变的进程，在持续发展高产、优质、高效农业和加快农业产业化进程中迈出了可喜的一步。为此，论述的园区建设的基本方法，并提出了建议。