甘薯块根组织感染黑斑病时产生的自发荧光现象及其应用

 1986、87两年分别采用上一年无病种薯28个品种/系各3块,取中部切决于切面上蘸接近等量和等浓度的黑疤病(Ceratocystis fimbriata)孢子悬液,恒温、恒湿培养,定期取样作侵染区组织徒手切片、乳酚油封片用BHZ型0lympus荧光显微镜(B+G滤镜激发)观察,取得以下资料。     

夏大豆亩产262.1kg生理指标研究

研究了夏大豆中油－８９Ｄ亩产２６２．１ｋｇ各项生理指标：叶面积系数，开花期、结荚期、鼓粒期分别为３．９８、５．８０、４．９１；总光合势１８．２万ｍ＾２·日，平均净光合生产率４．８１ｇ／ｍ＾２·日，氮磷总积累量分别为２２．２８ｋｇ和３．１３ｋｇ，每生产１００ｋｇ籽粒需吸收氮８．５０ｋｇ，磷１．１９ｋｇ，总干物质积累８７６．４７ｋｇ，粒茎比０．５１，经济系数０．３０。     

几种造林措施对墨西哥柏、银荆保存率及生长的影响

在呈贡劣质山地对墨西哥柏、银荆树植树造林进行了不同整地方式、植塘规格、种植密度、抚育方式的试验。结果：撩壕整地和水平台地的保存率及幼树生长量优于块状整地，且在阴坡深草地段尤为显著。３种植塘规格（６０ｃｍ×６０ｃｍ×６０ｃｍ，５０ｃｍ×５０ｃｍ×５０ｃｍ，４０ｃｍ×４０ｃｍ×４０ｃｍ）对墨西哥柏的保存率和高、径生长差异不显著，对银荆差异极显著，大塘优于小塘。３种种植密度（１．５ｍ×１．５ｍ，１．５ｍ×２ｍ，２ｍ×２ｍ），对幼林期的高、径生长及冠幅大小无显著影响，在３０°以上的陡坡，台地抚育优于菱形、扇形、块状抚育，与对照比较，４种抚育方式与之差异极显著。     

Enzootic abortion in a goat herd, caused by mixed infection with Coxiella burnetii and Chlamydia psittaci. Case report]

We report on an outbreak of enzootic abortion in a herd of goats with high losses caused by mixed infection with Coxiella burnetii and Chlamydia psittaci. Both agents could be detected by microscopic investigation of smears from afterbirths by Giménez staining and by a capture enzyme-linked immunofluorescence assay (Capture ELIFA). Additionally, Coxiella burnetii was isolated from the same tissues in BGM cell cultures. Serological investigations with CF, indirect ELIFA, and IF tests revealed high antibody titers against both agents in most animals. Coxiella antigen was still detected 91 days later in milk samples of two infected goats by Capture ELIFA.     

东北鼢鼠生活习性初探

本文通过对东北鼢鼠生活习性定位监测,初步掌握了其活动规律与地形、气温、土壤湿度等生态因子变化的关系,同时还探讨了东北鼢鼠的雌雄比例,繁殖情况、洞道结构和食性等,为今后防治工作提供了科学依据。     

柠檬桉,蚬木硝酸还原酶活力的比较

柠檬桉9年生单株的材积是蚬木的32.1倍。经不同浓度KNO_3、不同光照强度诱导后,柠檬桉不同叶龄叶的NR(硝酸还原酶)活力均明显高于蚬木。柠檬桉成年树中龄叶片NR活力提高的速度在4h内比蚬木的快2.3倍,而蚬木的NR活力衰减速率在4h内比柠檬桉的快35％。在不同浓度KNO_3溶液中,柠檬桉幼苗吸收NO_3~-量是蚬木的3～10倍,柠檬桉幼苗NO_3~-溢泌量是蚬木的3倍左右。     

林木资源消耗量估测方法的初步研究

本文主要通过应用统计学的有关知识,提出适应南方集体林区木材市场开放新格局的一种估测林木资源消耗量的方法;并将这种方法在沙县进行了实地验证;分析了其可靠程度与经济意义。     

影响吉林省亚洲玉米螟〔Ostrinia furnacalis（Guenee）〕一代发生区发生量长期预测的关键因子Ⅱ.发生程度与降雨及种群质量的关系

玉米螟的发生程度与5～8月初的降雨和种群质量密切相关，降雨主要影响越冬种群的复苏、化蛹、羽化、成虫的活动及3令前幼虫的存活，5～6月份特别干旱不利于越冬种群的复苏、化蛹和羽化．对成虫的产卵量有影响；7月份的干旱或大暴雨严重影响成虫的活动、卵的孵化和3令前幼虫的存活。不同年度间一、二化种群在越冬种群中所占的比例影响越冬种群的质量，在以一化种群为主时，玉米螟繁殖力强、发生晚，危害重。     

Differential effects of heparin on NO and tumor necrosis factor-alpha production in bovine blood mononuclear cells stimulated with Salmonella typhimurium lipopolisaccharide.

We investigated the influence of heparin, one of the extracellular matrix (ECM) components, on nitric oxide (NO) and tumor necrosis factor-alpha (TNF-alpha) production by bovine peripheral blood mononuclear cells (PBMC) and monocytes left to adhere for 2 (freshly adherent monocytes) and 48 h (resting monocytes), activated with Salmonella typhimurium lipopolysaccharide (LPS). After 24-h stimulation with LPS, heparin (100 microg/ml) increased (by about 40%) NO production by peripheral blood mononuclear cells and by freshly adherent monocytes. However, it did not change NO synthesis by the resting monocytes. Unlike its influence on NO level, heparin diminished TNF-alpha production by PBMC and monocytes stimulated with LPS. Microscopical examination of PBMC stained with biotin-labeled heparin, showed that both lymphocytes and monocytes were able to bind this glycosaminoglycan. We suggest that heparin, as a component of ECM, modulates the early response of monocytes to exogenous stimuli.