草坪植物对干旱逆境的效应   总被引：20，自引：8，他引：12  

王钦  金岭梅 《草业科学》1993,10(5):54-59

  相似文献   

肉鸡血清肌钙蛋白T与腹水综合征的关系研究   总被引：4，自引：0，他引：4  

杨宁  郭宝林  王进圣 《中国兽医杂志》2001,37(12):13-15

本试验建立了肉鸡血清中心源性肌钙蛋白T(Tn-T)的ELISA测定方法,用于对肉鸡腹水综合征的早期非损伤性诊断指标.结果表明,患腹水综合征肉鸡的血清Tn-T平均测定值为0.242±0.0703 ng/ml,而正常鸡的平均值为0.1 79±0.0467 ng/ml;以血清肌钙蛋白T测定值大于等于0.2 ng/ml作为判定肉鸡腹水综合征的标准,判别准确性达到78%.检测血液中肌钙蛋白T是诊断幼龄鸡早期心脏病的重要方法,可作为一种非损伤性方法用于针对肉鸡腹水综合征的育种方案中.  相似文献   

豆科牧草追施钾肥试验   总被引：5，自引：0，他引：5  

金义梅  万贵怡 《草业科学》1994,11(2):59-61

试验结果表明，当旱地红壤养分中的速效钾含量在７５．５ｐｐｍ情况下，白三叶每公顷追施氯化钾２２５ｋｇ，结果施肥比对照每公顷增产鲜草７７７９ｋｇ，每公顷氯化立鲜草３４．６ｋｇ，增产率达２９％。按生物统计ｔ测验，增产显著。当稻田速效钾含量在４５ｐｐｍ条件下，给紫云英每公顷施用氯化钾１１２．５ｋｇ，结果施肥比对照每公顷增产鲜草５０００－７７５０ｋｇ，平均每公顷增产６７５０ｋｇ。每公斤钾肥可增产粮食２３．５  相似文献   

不同灌水处理六个树种蒸腾速率与气候因素的关联分析   总被引：3，自引：1，他引：2  

李银芳  杨戈 《干旱区研究》1994,11(4):29-32

在三种供水条件下，用灰色关联分析法研究了六个树种蒸腾速率与空气相对湿度，气温和光照强度的关系。在对蒸腾速率综合影响的气候因素中，各树种各处都主要是空气相对湿度和气温，而光照强度则不是影响蒸腾速率的主要因素。  相似文献   

春用蚕品种繁花、春梅的育成研究   总被引：1，自引：1，他引：0  

陈和瑞  金韫玉 《蚕业科学》1994,20(1):26-29

采用杂交、系统选育和活蛹缫丝等育种方法，经１０年的选择和培育，育成了茧丝量多，茧丝质较优的中系皮斑限性品种繁花和日系品种春梅，其一代杂交种经多次实验室鉴定和省鉴审定表明：强健好养、茧丝质优、虫蛹率和万蚕产茧量分别比对照种提高５．６％和１５．２１％，茧丝长和解舒丝长分别增加９０．２米和７６．３米，净度９３．４２分。  相似文献   

肉鸡渗出性素质病     

范国雄  金久善  赖州文 《中国农业大学学报》1987,(2):229-232

1985.10～1986.7三个鸡场发生明显的渗出性素质病,详细地检查了其中的15例。通过临床检查、病理学观察和肝、羽毛及全血硒含量分析,以及血浆α—生育酚的测定,确诊为微量元素硒缺乏症。结论:该病的发生是由于饲料中维生素 E 偏低,从而影响了硒的吸收和利用;建议饲料含硒量以0.15～0.2ppm 为宜。  相似文献   

不同白三叶品种在江西低丘红壤地上的适应性研究     

于徐根  欧阳延生  金义梅 《草业科学》1995,(6)

本研究通过对６个白三叶品种的适应性观察，认为在江西低丘红壤地上以克利卡诺瓦白三叶表现最好，越夏抗旱力强，青草产量高。种子生产性能以拉丁鲁白三叶最好。海弗白王叶和新西兰白三叶适应性较差，表现不良。  相似文献   

营养纸膜覆盖栽培番茄的效应   总被引：1，自引：0，他引：1  

高国训  靳力争  郭富常  顾自豪  于燕  陈斌 《中国蔬菜》2001,1(6):6-7

以塑料地膜和无覆盖为对照 ,研究了营养纸膜对番茄生长的综合影响。结果表明 ,覆盖营养纸膜可加快植株生长 ,促进花芽分化、根系发育以及产量增加和品质的改善 ,前期产量和总产量分别比覆盖塑料地膜提高2 7.8%和 10 .2 % ,比无覆盖的提高 187.5 %和 2 0 .7% ;营养纸膜可有效提高土壤温度 ,增温效果接近塑料地膜 ,对杂草生长有明显抑制作用 ,特别对阔叶类杂草效果更佳 ;营养纸膜铺设在栽培畦内可以自行分解。  相似文献   

茶苗根结线虫病研究     

戎文治  还进  张克声 《植物病理学报》1984,14(4):225-232

 茶苗根结线虫病主要发生于一、二年生实生苗上,重病地发病率可达100%,死苗率在50%以上。据在浙江省的不完全调查,已知有18个县(市)发现此病。病原线虫经初步鉴定,主要为南方根结线虫(Meloidogyne incognita)与花生根结线虫(M.arenaria),而爪哇根结线虫(M.javanica)与泰晤士根结线虫(M.thamesi)均少见。试验表明,杭州茶区病原线虫一年发生不完整8代,大约20~30天完成一代,世代重叠明显。  相似文献   

The Effect of Caffeic Acid on Zearalenone-induced Ovarian Granulosa Cell Apoptosis in Mice     

PEI Yaping  ZHAO Jin  SUN Na  SUN Panpan  SUN Yaogui  FAN Kuohai  YIN Wei  LI Hongquan 《畜牧兽医学报》1956,51(12):3068-3075

Ovarian granulosa cells provide a special microenvironment for follicle formation and maturation through interaction with oocytes and their own secretion. A variety of harmful stimuli can cause granulosa cell apoptosis and metabolic disorders, reduce the quality of oocytes and have a negative impact on embryo formation. Zearalenone (ZEA) is a common cause of ovarian granulosa cells injury in the livestock industry, which is produced by mycotoxins, and lack of effective treatment drug. Therefore, in the current study zearalenone was used to induce ovarian granulosa cell injury and to explore the protective effect of caffeic acid on zearalenone-induced ovarian granulosa cell apoptosis in mice. Mouse ovarian granulosa cells were isolated by mechanical method, and indirect immunofluorescence was used to identify the isolated cells. MTT assay was used to determine the effect of caffeic acid on the activity of normal mouse ovarian granulosa cells.After granulosa cells were co-treated with caffeic acid (200, 100 and 50 μg·mL^-1) and ZEA for 24 hours, and control and ZEA group were set up at the same time, cell morphology and adherence were observed under a microscope. MTT was also used to detect cell viability. Caspase-3 mRNA expression level was detected by qRT-PCR. Cleaved-caspase-3 and cleaved-PARP protein expre-ssion levels were determined by Western blot. The results showed that positive FSHR staining appeared in cell cytoplasm of the test group, which confirmed that the isolated cells were mouse ovarian granulosa cells. The cell viability was above 90% which showed that caffeic acid had no toxic effect on granulosa cells. Compared with control group, ZEA group had smaller cell size, poor adherence, increased cell gap, and significant reduction in cell viability (P<0.001). Furthermore, the relative expression of caspase-3 mRNA, and cleaved-caspase-3 and cleaved-PARP protein level were significantly increased (P<0.001) compared with the control group. After caffeic acid treatment, cell gap was reduced, adherence was tight, cell viability was significantly increased (P<0.001). Caffeic acid significantly reduced zearalenone-induced increase in caspase-3 mRNA, and cleaved-caspase-3 and cleaved-PARP protein expression level (P<0.001). This study indicated that caffeic acid can restore granulosa cell viability by inhibiting ZEA-induced apoptosis.  相似文献