麻类纤维在非织造领域的应用

本文阐述了麻类纤维在我国非织造行业新用途的开发和拓展，对麻类纤维在非织造领域的利用符合国家农业可持续性发展的方向。     

亚麻屑和红麻芯用于仙客来栽培基质的研究初报

为提高亚麻屑和红麻芯的附加值,促进生物资源的综合利用,分别用25%、50%、75%与100%的亚麻屑和红麻芯替代普通泥炭作为仙客来栽培基质.结果表明用25%的亚麻屑或50%的红麻芯替代普通泥炭均有利于仙客来的生长与开花,其各项指标均优于常规基质.     

Study on Site-specific Nutrient Management in Cotton Field

The study on the characteristics of spatial variability of soil nutrients and fertilizer recommendations in cotton field under certain conditions of agricultural management was conducted with GIS and systematic approach for soil nutrient constrains. The results showed that of the spatial variability of soil nutrient was greatly related to the management condition of previous crops. Grid sampling and variable rate application technology (VRAT) were the tools that would hopefully increase fertilizer efficiency. The fertilizers were applied where they were needed and at proper rate. Balance fertilization demonstration showed that fertilizer recommendations according to the available nutrient level in soil could decrease fertilizer cost with 657.4 yuan / ha and increase seed cotton yield by 19.8%. A net profit of the balanced fertilization was 5314.9 yuan / ha higher than that of local fertilization practice.     

以甜菜粕取代小麦的全混合颗粒饲料对羔羊瘤胃pH值的影响

本试验选用24只3-3.5月龄的波德代(♂)×蒙古羊(♀)和陶赛特(♂6)×蒙古羊(♀)杂交一代羔羊,按2×2×2因子设计,研究了两个营养水平下以高果胶的甜菜粕取代小麦的全混合颗粒饲料对两种羔羊瘤胃pH值的影响。结果表明,低营养水平组的pH值显著高于高营养水平组(P=0.015);食后4 h(P-0.019)、6 h(P=0.009)的pH值在营养水平和饲料间存在互作,高营养水平组,小麦组羔羊的瘤胃液pH高于甜菜粕组,而低营养水平组、甜菜粕组的pH高于小麦组;羊品种对pH值无影响。     

Relationship of p21WAF1 gene polymorphisms with protein expression in breast carcinomas

AIM: To investigate the relationship between p21^WAF1gene polymorphisms and protein expression in breast carcinoma. METHODS: Polymerase chain reaction single-strand conformation polymorphisms technique (PCR-SSCP) and immunohistochemical assay of S-P immunostaining technique were used to study polymorphisms of p21^WAF1 and protein expression respectively on the specimen of paraffin-embedded tissues in 100 cases of breast carcinomas and 40 benign breast diseases as control. RESULTS: Two p21^WAF1 gene polymorphisms were found in 18% (18/100) of breast carcinomas and 5% (2/40) of control samples. The difference between the two groups was statistically significant (χ²=3.94, P＜0.05). The positive immunohistochemical reaction of p21^WAF1 protein were found in 50% (50/100) of breast carcinomas and 12.5% (5/40) of control samples. The difference between the two groups was statistically significant (χ²=16.84, P＜0.01). The positive immunohistochemical reaction of p21^WAF1 protein were found in 100% (18/18) of breast carcinomas with p21^WAF1 gene polymorphisms and 39% (32/82) of no p21^WAF1 gene polymorphisms. The difference between two groups was statistically significant (χ²=21.95, P＜0.01). The p21^WAF1 gene polymorphisms were correlated with the protein expression in breast carcinomas (r=0.576, P＜0.01). CONCLUSION: p21^WAF1 gene polymorphisms may create the different copies of mRNA and may make relevant protein molecules.     

韩国栗的生产和育种进展

简述了韩国育成的8个栗品种。扼要介绍了韩国栗的生产、销售和育种成就。韩国的育种目标之一是抗栗瘿蜂、抗寒、涩皮易剥离、坚果大。     

人工巢箱招引杂色山雀研究

2005年3-7月于辽宁省白石砬子国家级自然保护区悬挂人工巢箱招引杂色山雀,共设置80个巢箱,其中11个巢箱被4种鸟利用。鸟类的进驻率为13.75%,其中杂色山雀利用了8个巢箱,利用率占招引总数的72.73%。对招引到杂色山雀的巢箱因素进行分析,结果表明:杂色山雀多选择2m以上、南坡中下部、巢口朝西南的巢箱,而巢箱悬挂的树种对其选择没有影响,人为或天敌干扰会导致杂色山雀放弃巢箱。该项试验为进一步保护稀有物种和研究其繁殖生态提供了初步的依据。     

不同硒源对大麦农艺性状的影响及富硒效应研究

为了探明不同硒源对大麦的效应,对六个大麦品种(系)分别施用三种硒源(富硒复混肥、硒矿粉、亚硒酸钠)后的农艺性状及籽粒含硒量进行了分析,结果表明:①不同硒源均能提高大麦籽粒的含硒量,其增加量为0.016～0.087 mg/kg,增幅为14.4%～78.0%,富硒复混肥的效果较优;②不同大麦品种(系)施硒的籽粒含硒量为0.133～0.187mg/kg,比对照提高10.36%～80.65%;③施硒对大麦生育期无明显影响,但株高和穗长有增加趋势,千粒重有降低趋势.     

美洲鲥鱼嗜水气单胞菌病原的分离与鉴定

2021年,山东省临沂市一养殖场养殖的美洲鲥鱼(Alosa sapidissima)突发疾病并出现严重死亡,日死亡率高峰期达到2.5%,累积死亡率约为90%。患病鱼主要症状为体表出血、溃疡,解剖可见腹腔腹水、肝脏暗红,并伴有肠炎。组织病理学检测发现,病鱼肝脏出现弥散性坏死,嗜碱性粒细胞增多和细胞肿胀空泡变性;脾脏出现出血性贫血性坏死灶、核破裂和核固缩;肾脏淋巴细胞坏死脱落,肾小体毛细血管球萎缩,近端小管和远端小管内的细胞出现不同程度的细胞结构消失。发病鱼肉眼和显微镜观察未见明显寄生虫,利用PCR方法检测鲤疱疹病毒2型(Cyprinid herpesvirus 2)、鲈鱼蛙病毒(largemouth bass ranavirus)等淡水鱼类常见病毒均为阴性。细菌分离培养结果显示,从发病鱼的肝脏、肾脏和脾脏中分离得到形态一致的优势菌,命名为AS-AH2101。经16S rRNA测序比对和生理生化鉴定,确定AS-AH2101为嗜水气单胞菌(Aeromonas hydrophila)。毒力基因检测结果显示,AS-AH2101携带气溶素(aerA)、溶血素(hlyA)、丝氨酸蛋白酶(ahpA)、...