樱桃番茄嫁接砧木筛选研究

以格格樱桃番茄作接穗,农优野茄、托鲁巴姆、金钻砧木和砧木1号作砧木,进行嫁接和嫁接苗栽培试验.试验结果表明.4种砧木与樱桃番茄嫁接亲和性由强到弱依次为:砧木1号、金钻砧木、农优野茄和托鲁巴姆;嫁接苗青枯病发病率与自根苗差异均达到极显著水平,嫁接苗产量比自根苗增产15.9%～48.7%,在抗青枯病和产量方面表现都比较好的砧木为农优野茄和砧木1号.     

低温弱光对西葫芦幼苗渗透调节物质的影响

以西葫芦品种早青一代为试材,研究了不同低温弱光组合及低温弱光持续时间对西葫芦幼苗渗透调节物质的影响。结果表明:可溶性蛋白质含量随低温弱光逆境程度加剧和持续时间延长持续减少;在15℃/5℃以上,弱光处理渗透调节物质游离脯氨酸、可溶性糖含量增加,但增加幅度随着弱光逆境加剧和持续时间延长而减弱;但在15℃/5℃下,弱光逆境导致游离脯氨酸、可溶性糖含量先增加后降低。     

DME发动机非常规排放物的检测与分析

用气相色谱仪和傅立叶红外光谱仪对燃用DME的ZS195柴油机的排气中的甲醛(HCHO)、甲酸甲酯(CHCOOCH3)、甲酸(HCOOH)非常规排放物进行了检测和分析。结果表明,DME发动机的尾气排放中,均检测到HCHO,HCOOCH3,HCOOH排放物,且甲醛是非常规排放物中的主要成分,甲醛、甲酸甲酯的排放量随转速上升而略有上升,随负荷增加而不同程度的减少,而甲酸排放量变化则不甚明显。     

对虾工厂化养殖水环境基本特征研究

采用现场试验方法研究了工厂化养殖水环境基本特征,并与室外土池对虾养殖环境进行了对比分析。研究结果表明,对虾工厂化养殖水环境的基本特征为：水温、盐度和DO完全可以人为控制;pH和Chla在短时间内可以被人工调控,但无法在长时间尺度内控制其变化趋势和变化幅度;而氮、磷营养盐的浓度和变动则无法人工控制。与对虾室外土池养殖相比,工厂化养殖水体中水温、盐度和DO的变动较小,其平均值的差异非常显著;pH的变动较大,其平均值显著高于室外养殖池水体;Chla含量较高,与室外养殖相比无显著差异;水体中氮、磷营养盐含量均在较低的浓度范围内波动,而且其平均值在两种养殖模式下差异均不显著。其中,NO3-N是DIN的主要存在形式,NO3-N占DIN的平均比率为62.17%。另外,与室外养殖相似,对虾工厂化模式下NH4-N、NO2-N、NO3-N以及PO4-P浓度并不受养殖密度或DO含量的影响。     

围绕烟草搞开发，建设新农村示范区

近年来,邵阳县农业综合开发紧紧抓住全县进入全省烟叶生产重点县和列入广西永久生产基地的有利机遇．按照“突出重点、整体推进、连片开发”的要求,牵头整合支农资金,在项目区围绕烟叶搞开发,加强农业基础设施建设,着力建设现代烟草产农业示范片,打造社会主义新农村示范区．取得了显著成效。     

响应面优化黑豆总黄酮微波辅助提取工艺及其抗氧化性能评价

为优化微波提取黑豆总黄酮化合物的工艺,并对其抗氧化性进行初步研究,在单因素试验的基础上,选取液料比、乙醇体积分数和微波功率为自变量,总黄酮得率为响应值的三因素三水平的响应曲面分析法,模拟得到二次多项式回归方程的预测模型。结果表明:提取工艺的最佳条件为功率600 W、液料比40∶1、乙醇体积分数60%,在此条件下,总黄酮得率达到22.1 mg·g~(-1)。抑制油脂过氧化作用的研究结果表明黑豆黄酮是一种天然的抗氧化剂。     

小麦季施氮对麦套花生光合特性、氮素和干物质积累及周年氮素利用率的影响

在大田条件下,以小麦品种济麦22号和花生品种花育25号为材料,设置4种不同追施氮肥的方式,分别为:(A)拔节期施纯氮160kg/hm~2、(B)拔节期施纯氮80kg/hm~2+开花期施纯氮80kg/hm~2、(C)孕穗期施纯氮160kg/hm~2、(D)开花期施纯氮160kg/hm~2;施肥方法均为开沟追施。研究了小麦季4种不同追施氮肥方式对下茬花生各生育时期叶片叶绿素含量、光合速率、成熟期各器官氮素和干物质积累与分配及周年氮素利用效率的影响。结果表明:C处理的氮肥运筹方式提高了叶片叶绿素含量和光合速率;荚果中氮素和干物质积累量及其分配比例均较高;小麦籽粒产量最高、花生荚果产量较高;氮素内部利用效率和氮肥偏生产力均最高。本试验条件下,综合考虑周年作物产量和氮素利用效率,前茬小麦基施纯氮105kg/hm~2、孕穗期追施纯氮160kg/hm~2和花针期追施25kg/hm~2(C处理)是小麦套种花生种植模式下最佳的氮肥运筹方式。     

桑植县茶产业现状及发展对策

通过对桑植县茶产业现状进行实地考察调研,剖析桑植县茶产业发展的优势与不足,提出桑植县茶产业发展的对策措施。     

Effects of noninvasive delayed limb ischemic preconditioning on prognosis of myocardial infarction

AIM: To study the effects of noninvasive delayed limb ischemia preconditioning (NDLIP) on animal cardiac function, myocardial morphology and myocardial apoptosis after myocardial infarction (MI). METHODS: Healthy SD male rats[n=45, weighing (250±10) g] were randomly divided into 3 groups:MI group:the animal model of MI was established by surgical ligation of left anterior descending artery (LAD) after 2 weeks; NDLIP group:after the success of the MI animal model, NDLIP was carried out every other day until the 4th, 6th and 8th weeks; sham group:as the negative control group, the animals were taken heart LAD threading but no ligation. All rats were fed conventionally. At the end of the 4th, 6th and 8th weeks, all rats were made ventricular intubation, and then the hemodynamic parameters were recorded. The blood samples were withdrawn from the abdominal aorta and the serum was separated via centrifugation. The serum contents of Bcl-2 and Bax were measured by ELISA. Left ventricular anterior wall was homogenized. The mitochondrial respiratory chain complexes Ⅰ, Ⅱ, Ⅲ and Ⅳ in the myocardial tissues were detected by ELISA. RESULTS: At the end of the 4th, 6th and 8th weeks, compared with MI group, left ventricular systolic pressure in NDLIP group was significantly increased, while left ventricular end-diastolic pressure in NDLIP group was significantly decreased (both P<0.05). Mitochondrial respiratory chain complexesⅠ, Ⅱ, Ⅲ and Ⅳ in NDLIP group were significantly increased (P<0.05). The serum level of Bcl-2 in NDLIP group was significantly increased and Bax level was reduced remarkably (both P<0.01). CONCLUSION: NDLIP improves the hemodynamic indexes, promotes the mitochondrial respiratory function and inhibits cell apoptosis, thus improving the prognosis of MI.     

春早熟甘蓝新品种‘张甘40’

‘张甘40’是以雄性不育系‘M0105-7’(保持系‘8513-1-2’)为母本,以‘F07013-5’为父本配制而成的甘蓝新品种,成熟期60 d左右。开展度56.08 cm,外叶9~11片,蜡质轻,单球质量1.6~2.4 kg,叶球高17.0 cm,叶球宽14.0 cm,产量75 000~85 500 kg·hm~(-2)。圆球,中心柱7.0 cm,成熟球外包绿叶2~3层,根茎高3.0 cm。口感脆甜。耐裂球,耐抽苔,适合冀北高寒地区春秋两季露地栽培。