螺旋粉虱为害对四季豆产量的影响及其防治指标研究

通过设置田间笼罩试验,确定了螺旋粉虱不同种群发生密度对四季豆产量的影响。研究结果表明,随着螺旋粉虱虫口密度的增加,四季豆平均荚果长度、平均最粗处周长、平均单果质量、每株豆荚数量和质量均显著下降,虫口密度与豆荚质量呈显著负相关。在研究产量损失的基础上,确定了不同产量水平下四季豆的经济允许损害水平和螺旋粉虱防治的经济阈值。当产量为1 500 kg/667 m~2时,四季豆的经济允许损害水平为9.80%,螺旋粉虱防治的经济阈值为11对成虫。     

特早熟菜豆新品种早丰的选育

早丰是从引进的育种材料851-923中选择优良变异株经系统选育而成的早熟菜豆新品种。全生育期春播90~95 d(天),夏播80~85 d(天),保护地栽培115~120 d(天)。荚为乳白色,荚长18~22 cm,单荚质量25 g,荚条顺直,肉厚,质嫩,纤维少,耐老性强,口味佳;抗炭疽病、锈病能力强于851-923;春露地栽培每667 m2产量3 000 kg左右,秋露地栽培1 900 kg左右,保护地栽培2 800 kg左右。     

不同贮藏条件和低水分处理对菜豆种子活力的影响

采用不同的温度及相对湿度和低水分处理对菜豆种子进行贮藏,以研究不同贮藏条件下和低水分处理对种子发芽率、活力指数及某些生理生化特性的影响,结果表明,菜豆种子在低温低温及低水分处理条件下贮藏8个月后,仍可保持高的活力,细胞膜能保持较好的完整性,过氧化氢酶、过氧化物酶和酸性磷酸酶的活性较高。而在高温高温条件下贮藏4个月,室温开放贮藏6个月后菜豆种子的发芽率迅速下降,不再适合作种子用。     

硒对芸豆种子萌发、生理特性及营养品质的影响

为探究硒对芸豆种子萌发、生理特性及营养品质的影响,以芸豆品种“英国红”为材料,进行发芽试验及大田试验。发芽试验设7个硒浸种浓度,分别是0（J₀）、7.5（J₁）、15.0（J₂）、22.5（J₃）、30.0（J₄）、37.5（J₅）和45.0mg/L（J₆）。大田试验设4个喷硒量,分别是0（P₀）、10（P₁）、20（P₂）和30g/hm²（P₃）。结果表明,30.0mg/L硒浸种浓度显著促进芸豆种子萌发;30g/hm²田间喷硒量较对照（不施硒）芸豆叶片的过氧化物酶活性、还原型谷胱甘肽含量和叶绿素含量分别提高了35.29%、32.34％和7.92%,丙二醛含量降低了20.32%;籽粒中可溶性糖、蔗糖、粗脂肪、粗蛋白、粗淀粉和硒含量分别提高了23.65%、37.23%、75.00%、62.14%、32.21%和24.11%。     

Comparison of glomerular filtration rate between greyhounds and non-Greyhound dogs

Greyhounds have significantly higher serum creatinine (SCr) concentration than do non-Greyhound dogs that may be attributable to differences in glomerular filtration rate (GFR). By means of plasma clearance of technetium Tc 99m diethylenetriaminepentaacetic acid, GFR was measured in 10 Greyhounds and 10 non-Greyhound dogs with normal findings of physical examination, CBC, serum biochemical analysis, and urinalysis. Dogs were fed the same diet for a minimum of 6 weeks before GFR data collection. Greyhounds had significantly higher mean +/- SD GFR (3.0 +/- 0.1 vs 2.5 +/- 0.2 ml/min/ kg; P = .01) and SCr concentration (1.8 +/- 0.1 vs 1.5 +/- 0.1 mg/dL; P = .03) than did non-Greyhound dogs, but the serum urea nitrogen (SUN) concentration was not significantly different (18 +/- 1 vs 18 +/- 2 mg/dL; P = .8). Therefore, the higher SCr concentration in Greyhounds is not attributable to decreased GFR, and may be associated with the high muscle mass in the breed. Healthy Greyhounds have higher GFR than do non-Greyhound dogs.     

Renal resistive index in 55 dogs with degenerative mitral valve disease

Background

Azotemia occurs frequently in dogs with degenerative mitral valve disease (DMVD). It could indicate changes in renal hemodynamics.

Hypothesis/Objectives

To assess the renal resistive index (RI) in dogs with DMVD, and the statistical link between heart failure class, azotemia, echo‐Doppler parameters, several plasma variables, and RI.

Animals

Fifty‐five dogs with naturally occurring DVMD were used (ISACHC class 1 [n = 28], 2 [n = 19], and 3 [n = 8]).

Methods

Observational, blinded study, performed under standardized conditions. Physical examination, renal ultrasonography, and echo‐Doppler examinations were performed in awake dogs. The RI of the renal, interlobar, and arcuate arteries were measured. Plasma creatinine, urea, and N‐terminal pro‐B‐type natriuretic peptide concentrations (NT‐proBNP) were determined. Statistical links between variables and RI were tested by means of a general linear model.

Results

Although the RI of renal and arcuate arteries were unaffected by ISACHC class, the left interlobar RI increased (P < .001) from 0.62 ± 0.05 (mean ± SD) in class 1 to 0.76 ± 0.08 in class 3. It was also higher (P < .001) in azotemic (0.74 ± 0.08) than in non‐azotemic (0.62 ± 0.05) dogs. Similar findings were observed for right interlobar RI. Univariate analysis showed a positive statistical link between NT‐proBNP (P = .002), urea (P < .001), creatinine (P = .002), urea‐to‐creatinine ratio (P < .001), left atrium‐to‐aorta ratio (P < .001), regurgitation fraction (P < .001), systolic pulmonary arterial pressure (P < .001), shortening fraction (P = .035), and RI.

Conclusion and Clinical Importance

In dogs with DMVD, interlobar RI increases with heart failure severity and azotemia but a cause and effect relationship remains to be established.     

壮阳促孕散对肾阳虚大鼠垂体-性腺轴分泌激素的影响

[目的]研究中药壮阳促孕散对肾阳虚大鼠垂体-性腺轴分泌激素的影响。[方法]用氢化可的松造大鼠肾阳虚模型,造模7 d,造模同时中药治疗组和阳性对照组灌胃给药13 d,放射免疫法测定血清睾酮(T)、促黄体生成激素(LH)和促卵泡生成激素(FSH)。[结果]模型对照组造模后出现明显的阳虚证表现,血清中T下降,LH、FSH升高,给药后阳性对照组、中药治疗组血清中T升高,LH、FSH下降。[结论]中药壮阳促孕散可调节肾阳虚大鼠血清中LHF、SH和T的分泌。