Effects of different lighting on reproductive system in depressive female rats

AIM: To investigate the effects of different lighting on the reproductive system in depressive female rats. METHODS: Healthy adult female rats were randomly chosen as control group, and the depressive adult female rats in SPF grade were randomly divided into 5 groups(7 rats each):depressive model group, sulfur lamp group, heat radiation lamp group, fluorescent lamp group and LED lamp group. After 45 d of continuous illumination, the estrous cycle was observed by the vaginal exfoliated cells, and the organ indexes of ovary and uterus were calculated. The concentrations of estiadrol(E₂), prolactin(PRL), progesterone(PROG) and testosterone(T) in the serum were detected by ELISA, and the histopathological lesion of ovary was observed under microscope with HE staining. RESULTS: The estrous cycle exhibited serious disorder, the ovaries exhibited serious congestion, and the organ indexes of ovary and uterus and the concentrations of E₂, PRL, PROG and T decreased significantly in the rats in depressive model group compared with control group(P<0.05). The estrous cycle and histopathological damage of ovary were obviously improved, and the concentrations of E₂, PRL, PROG and T were significantly increased after the sulfur lamp lighting in the depressive female rats compared with depressive model group. No obvious change and improvement of the reproductive functions in the heat radiation lamp group, fluorescent lamp group and LED lamp group was observed. CONCLUSION: The reproductive functions of depressive female rats are improved by sulfur lamp lighting.     

杀虫灯已成为森林害虫综合治理的重要工具

近年来,以佳多频振式杀虫灯为代表的灯光诱杀器械,其技术性能得到较大改进和提高.在监测功能的基础上,作为诱杀工具,得到广泛认可,防治森林害虫范围不断扩展,防治面积越来越大,展现出广阔的应用前景.     

THE QUICK DETERMINATION METHOD OF RESIN CONTENT IN LARCH WOOD

The resin content in larch wood is usually determined by the traditionalBenzene-Alcohol Extract Method(BAEM).In order to meet the requirement of production prac-tice,the authors present two simple quick determination methods,IR lamp method and hydrogenperoxide solution method.Compared with the results of traditional method,the results of newmethods are nearly the same as former,therefore,both two methods can reflect the change condi-tion of resin content in wood.     

杀虫灯诱杀松毛虫的试验

通过在鹤岗市红旗林场设点布灯诱杀落叶松毛虫试验,结果表明:双灯诱杀效果好于单灯,晴天、无风天诱杀效果好。最佳开灯时间为20:00至4:00;采用杀虫灯诱杀落叶松毛虫防治成本为60元.hm2,比化学药剂防治成本低50%。     

不同波长诱虫灯对蜀柏毒蛾成虫的诱集研究

采用波长分别为300 nm、340 nm、380 nm、420 nm、460 nm、500 nm、540 nm和580 nm、功率8W的诱虫灯进行了蜀柏毒蛾成虫的诱集研究.结果表明：8种波长的诱虫灯诱集效果有差异,波长340nm、功率8W的诱集效果最好.波长340 nm、功率8W诱虫灯在60 min时间内对距离在180 m范围内的蜀柏毒蛾成虫具有诱集效果,但诱集率达87.1％以上的距离在120 m以内.     

LED杀虫灯对温室害虫的诱杀效应

[目的]为防治温室害虫提供安全有效的杀虫手段。[方法]以高压电网和粘虫黄板为对照,研究自制LED灯板对温室害虫的诱杀效果。[结果]在4月20日和21日,强、中、弱光黄色LED杀虫灯的杀虫量分别为36、20、19和93、82、80头;其对射黄板的杀虫量分别为20、15、10和57、40、39头;无杀虫灯对射黄板的杀虫量分别为5和8头。光强越强,杀虫越多。LED杀虫灯的诱杀效果高于相应对射黄板,杀虫灯对射黄板的杀虫量高于无杀虫灯对射的黄板。在4月26日和27日,绿、蓝、黄、红杀虫灯的杀虫量分别为66、56、43、5和228、234、120、23头;绿色、蓝色LED杀虫灯杀虫最多,黄色杀虫灯次之,红色杀虫灯最少。[结论]LED杀虫灯适用于防治温室害虫。     

频振式杀虫灯在富川蔬菜生产中的应用效果

在生产应用上,大量试验示范表明,频振灯诱虫量大、诱虫谱广,对各类作物主要害虫及抗药性极强的夜蛾科害虫都有良好控害效果,对害虫天敌及人畜安全,能大幅减少农药使用量,使用方法简便,增效明显。频振灯技术已是富川县今后大力发展生态农业,实施植保“亮点工程”的关键技术。     

3种二化螟防控措施的效果及效益分析

在湘阴试验示范基地对二化螟开展了3种不同防控技术措施的试验,比较分析了二化螟性诱剂、频振式杀虫灯和常规药剂的防治效果及经济效益。结果表明：性诱剂与杀虫灯对该虫的防控效果较好,可持续控制该虫种群的发展,其经济和生态效益明显。     

几种化学物质对水中百菌清光解的影响

[目的]研究水体常见化学物质对百菌清光解的影响。[方法]以高压汞灯为光源,设计试验,研究色素、H2O2、硝酸盐及亚硝酸盐对水中百菌清光解的影响。[结果]结果表明,核黄素、H2O2、硝酸盐和亚硝酸盐能加快百菌清的光解,表现出强烈的光敏效应;核黄素、H2O2、硝酸盐和亚硝酸盐的浓度对百菌清的光解速率有影响,在低浓度下,光解率及光敏效率随着化学物质浓度的增大而增大,浓度超过一定限度后,光解率及光敏效率逐渐降低;亚甲基兰和孔雀石绿使百菌清的光解减慢,表现出光猝灭效应,光猝灭效率分别为61.6%和13.5%。[结论]核黄素、H2O2、硝酸盐和亚硝酸盐能加快百菌清的光解,但亚甲基兰和孔雀石绿使百菌清的光解减慢。