科技应用先锋 企业发展战将——记全国十大杰出青年硕士“猪倌”郑长锋

随着改革开放的不断深化,我国畜牧业加快了从传统的个体、零星养殖向现代规模化养殖方向发展。知识的运用在传统畜牧业中发挥出强大的作用,有着丰富知识的经营者正在激烈竞争的市场中逐渐崭露头角,只有他们才有实力和条件进行大规模养殖,而规模养殖的优越性也只有通过他们才能体现得更加完美。本(?)报道的主人公的事迹,为我们怎样从事规模养殖业提供了一套科学的发展思路和实践模式,授人以鱼不如授人以渔,但愿广大养殖户能从中有所收获。     

关于农工工资形式的商榷

我们练湖农场去年在农畜牧工人中推行计件工资制以后,畜牧工人实行计件的情况基本是良好的;虽然也遇到了一些问题,但还容易解决。而在农工实行计件工资后,出现了增加成本影响生产的现象,我认为这不是实行计件工资的必然结果,而是在于对计件具体形式的选择和辅助形式的运用上存在缺陷所致。去年我们在农工方面实行计件工资制时所采取的主要形式是单项作业计件。这一形式对刺激农工     

矮化密植在高寒山地苹果栽培中的应用

矮化栽培是果树生产上的一项重大改革。随着果品生产集约化、专业化以及市场对果品质量的要求和竞争,矮化密植已成为现代化果树栽培的重要标志和发展趋势。所谓矮化密植,就是人为地采取某种措施把树体变得矮小紧凑,使之适于加大密度和越冬防寒,从而达到早结果、早丰产、早收益的目的一种栽培方式。在高寒山地苹果栽培生产中,实行矮化密植是十分必要的。     

桧柏播种育苗技术

1 种子的采集与处理 成熟的桧柏种子褐色，有光泽。球果成熟时紫褐色，表面有白粉。果肉变软，1～2月间从树上自行脱落，要及时采集，以免鸟鼠危害。果实采集后碾压或揉搓，清除果皮及杂质，选纯净种子，用0．3％的高锰酸钾溶液消毒2h，再用40℃温水浸种48h。捞出后掺3倍体积的湿沙拌匀，埋于排水良好的地下。混沙种子上面距地表20cm．。然后用湿沙填平，在其上面埋一土丘。如果种子量大，要设置通气把。夏季每隔20d检查一次。     

黄酮和维生素E对己烯雌酚所致雄性小鼠肝脏氧化损伤的保护作用

The purpose of this study was to investigate the oxidative damage caused by different doses of diethylstilbestrol (DES) and the protective effects for DES induced toxicity with flavonoids and vitamin E in Kunming mice. 80 Kunming male mice were randomly divided into 10 groups, the groups were normal saline control group, DES exposed groups (0.035, 0.35, 3.5 mg/(kg穌)), flavonoids interference groups(26.0, 58.0, 112.0 mg/(kg穌)) and vitamin E interference groups(56.2, 112.4, 224.8 mg/(kg穌)). The effects on liver and testis were studied in adult male mice treated for one week. Mice were killed to collect liver and testis, and then contents of malonadehyde (MDA), superoxide dismutase (SOD), glutathione perxidase (GSH-Px) and total antioxidant capacity (T-AOC) were determined. It was found that high dose DES (3.5 mg/(kg穌)) could induce mice liver oxidative injury. The protective effects of flavonoids for DES induced toxicity on liver dose dependent increased. The contents of MDA significantly decreased (P<0.01), but the contents of SOD significantly increased in the high dose group (112 mg/(kg穌)). The contents of MDA significantly decreased (P<0.01), but the contents of GSH-Px, SOD and T-AOC significantly increased in the medium and high dose groups (112.4, 224.8 mg/(kg穌)). DES appeared to cause oxidative injury in Kunming mice. The results provided preliminary experimental support for flavonoids and vitamin E as medicine for DES induces damage.