小齿短肛棒(虫脩)的发生与治理

小齿短肛棒Xiu Baculum minutidentatum Chen et He近年在吉林省通化市大面积发生，危害非常严重。该虫大发生的原因主要有：生物学因素：营孤雌生殖、寄主范围广、食量大、具有迁移现象、拟态现象、假死现象和断肢再生能力，环境因素：温度、湿度、越冬场所、天敌种类和林分组成以及社会因素等。该虫的治理方法包括营林措施、人工防治、生物防治和化学防治。     

旱地谷子高产栽培措施模型研究

1987～1988年在山西省屯留试点进行试验,采用二次回归正交旋转组合设计,对影响谷子产量形成的密度、播期、氮、磷和农家肥五项关键农艺措施进行了定量化的综合研究,初步确定了最佳农艺措施组合方案,并利用产量反应模型研究了各项措施对产量形成的单独反应以及各项农艺措施间的互作效应.优化方案经1988和1989年的示范对比和小面积推广,证明是切实可行的.     

我国南方农作保土技术综述

我国南方农作保土技术综述李凤，陈法扬（南昌水利水电高等专科学校，南昌３３００２９）一、我国古代农作保土技术简介农作保土技术是我国传统的农业技术措施，有着很悠久的历史。我国古代劳动人民在长期从事农业生产与自然灾害作斗争的实践中，逐渐认识，积极探索，并系...     

黑河九号大豆综合高产农艺措施数学模型分析

本试验应用二次回归正交旋转试验设计方法研究了黑河九号大豆主要栽培因子(密度、氮肥、磷肥和钾肥)与大豆产量的关系,建立了黑河九号大豆在本省第四积温带黑河地区土壤中等肥力条件下的高产栽培数学模型。通过微机对模型的解析,得出各因子对产量效应的主次关系,两因子搭配的产量效应以及等产量线图。通过边际产量分析了经济效益,并通过频数分析,得出指定产量水平下的最佳综合高产农艺措施组合方案,为黑河九号大豆大面积生产规范化栽培提供了依据。     

Critical difference of some bovine haematological parameters.

The purpose of the present study was to calculate the critical difference between 2 analytical results for the red blood cell count (RBC), the white blood cell count (WBC), the haemoglobin concentration (Hb), and the haematocrit (PCV) in blood from Red Danish Dairy cows. The critical difference can help to judge whether the difference between 2 consecutive analytical results from the same animal may be safely ascribed to natural variation or not. To calculate the critical differences, blood samples from 20 clinically healthy lactating cows were collected once daily for 5 consecutive days. The total variance of the analytical results was divided into the component of variance between cows (S2Inter), the component of variance for days within cows (S2Intra), and the component of variance for measurements (S2Anal) using nested analysis of variance. The critical difference was then calculated from S2Intra and S2Anal as 0.61 x 10(12)/l for RBC, 2.2 x 10(9)/l for WBC, 0.79 mmol/l for Hb, and 0.07 for PCV. The critical differences may be used as guidelines to indicate potentially important changes in the parameters. However, the analytical results should not be assessed by the critical differences alone, but should also be compared to the corresponding reference intervals.     

洋葱抽薹形成原因及防治措施研究

通过4a的洋葱品比试验和10a的高效栽培技术研究,结果表明,洋葱的抽薹率与品种、播期、光照和温度等密切相关。结合生产实际,针对形成薹葱的影响因素提出了选用西葱1号和西葱2号等优良品种,9月中下旬播种、适时定植,喷施薹葱抑制剂,定植后适时适量追肥,发现抽薹葱人工摘除薹等防治措施。     

结球甘蓝抗裂球机理及防治措施研究进展

从裂球的遗传因素、叶球解剖特征、生理特性、环境条件、栽培措施等方面分析了结球甘蓝裂球发生的原因,并提出了相应的预防措施。     

本地山羊混合感染捻转血矛线虫病与疥癣病防治

自2017年起,怀化市麻阳县某私人羊场山羊陆续出现一种脱毛皮肤病,用了一些药物效果不佳,严重时甚至出现死亡。2018年笔者受邀进行诊治,根据病羊的临床症状和实验室检查诊断为羊捻转血矛线虫病与羊疥癣寄生虫病,通过采取综合防治措施,取得了明显疗效。     

饲料经营环节监管中存在问题及解决措施

随着我国经济不断发展,社会不断进步,人民群众生活水平不断提升,促使养殖业也在大环境下逐步快速壮大起来。近年来,由于人们对畜产品的需求量增多,畜产品质量和安全问题也就备受社会各界关注。尤其是饲料及饲料添加剂作为投入品在养殖环节的使用中明显增加,饲料也是影响动物性食品安全的一个重要因素。因此,畜牧兽医部门在监管中发挥着至关重要的作用,如何做好监管的问题值得深思,笔者就如何做好饲料经营环节的监管工作予以探讨,提高工作效率。     

Stress recovery and restorative effects of viewing different urban park scenes in Shanghai,China

ObjectivesMany studies have found that natural environments benefit human health and wellbeing, but few have measured restorativeness of specific landscape components, especially in Chinese settings. Because the rapid urbanization of China is accompanied by increasing predomination of hardscape components in cities, the restorative quality of urban green space is a crucial issue. This study explored the stress recovery effects of different videotaped scenes, using six urban parks and one urban roadway scene. Potentially restorative urban park scenes were controlled for nature-based vs. hardscape components, presence/absence of people, and level of openness.MethodsSubjects were Chinese university students (N = 140) aged 18–24. After completing an oral exam as a stressor, an equal number of males and females were randomly assigned to watch one of the seven videotaped scenes during a stress recovery stage, while data were collected on changes in stress and attentional levels. Physiological responses were measured by Electrocardiography (ECG) and Skin Conductance Response (SCR). Psychological responses were measured by the state (short-term) version of the State-Trait Anxiety Inventory (STAI-S), the Digit Span Backwards (DSB) test, and the Perceived Restorativeness Scale (PRS).ResultsIn a Chinese sample, this study confirmed previous findings that nature-based urban park scenes relieved stress and restored attentional levels, while viewing an urban roadway increased negative feelings. Overall perceived restorativeness was significantly higher in two scenes depicting a Lawn without people and a Small Lake, compared with a paved Plaza with or without people, confirming previous findings that restorativeness is associated with predominance of nature-based landscape components. This study also confirmed previous findings that outdoor scenes without people were more restorative than scenes depicting people.DiscussionThis study found different levels of restorativeness associated with different landscape features, and helped confirm that nature-based components are more likely to reduce stress than hardscape components, using Chinese urban scenes with a Chinese population. Findings can be used in future planning and design of urban spaces in China, emphasizing the value of parks and green spaces in relevant contexts.