病死猪肉的感观检验和处理

从猪肉的放血程度、切杀口状况、血液沉积情况、淋巴结的变化等方面，介绍了健康猪肉、急宰猪肉、病死猪肉的感观检验方法，并提出了病死猪肉、急宰猪肉的无害化处理方法。     

基于PIC单片机的轨检车数据采集系统的设计

随着轨道检测手段的不断提高,如何把轨道检测数据高效、快捷地下发到基层施工部门,尽可能快地消除事故隐患、更好地指导线路维修、保障行车安全,以满足日益发展的快速、准高速、高速铁路的要求变得日益重要。论文重点介绍了基于PIC单片机的轨检车数据采集系统的设计,该设计方案提高了轨检车的测量技术,保证了测量的准确性,对快速检查轨道病害,保证铁路运输安全和提高旅客列车的平稳舒适性均能发挥重要作用。     

YTG型双向体积管在计量检定中的应用

体积管是检定流量计的标准器。ＹＴＧ型双向体积管，其外型尺寸、主体结构、检定速度、日常管理等方面，均比单向体积管有明显的优点，并具有独特的容积补偿性，给体积管的管理、使用带来极大方便。介绍了ＹＴＧ型双向体积管的结构、技术指标及其优越性，并建议在条件允许的情况下，尽可能使用双向体积管。     

论如何避免党校网站同质化——以省级党校为例

经过近10年的发展,省级党校网站已经历了填补空缺时期、齐头并进时期进入同质化时期.网站同质化表现为网站定位不约而同,栏目设置大同小异,专题策划不谋而合,导航系统殊途同归等现象.寻求同质化与个性化之间的平衡点,是党校网站成功的关键.     

立地条件对山苍子果实产量及油质的影响

对山苍子果实产量及油质的影响的因素有很多。本文主要就产地条件对其影响进行了调查．其结果表明：立地条件直接影响到山苍子果实的产量．而对其油质的影响不很显著。这对山苍子的生产经营而言，有一定的参考价值。     

福建省林业检查站现状与改进对策

通过对福建省99个林业检查站工作现状的调查,作者认为:1)林业检查站在有效地维护木材、野生动植物的正常运输,有效地打击违法运输,有效防止和制止有害生物传播等方面发挥了巨大的作用;2)林业检查站主要面临着工作条件艰苦,人员少任务重,执法环境差等问题;3)存在问题的主要原因是管理体制不顺,各级政府及主管部门对林业检查站的作用认识不足,相关部门协调沟通不够;4)建议今后要有效整合执法力量、理顺管理体制,加大资金投入力度,协调道路运输各相关部门配合工作。     

水曲柳幼林适生立地条件研究

在帽儿山地区对不同立地条件下水曲柳人工幼林生长指标进行标准地调查,并运用数量化方法研究了影响水曲柳人工林生长的立地因子。结果表明：影响水曲柳人工林生长的主要立地因子依次为坡位,土壤A层厚,坡向和坡度,其中坡位为主导因子。水曲柳人工林在中上坡位生长最好,在下坡位生长差。根据立地因子划分了34个立地类型。此外对不同立地类型的养分状况进行了分析,发现养分并不是限制水曲柳生长的主要因子。     

成都地区巨桉引种栽培初步研究

成都市1999年开始引种巨桉,目前栽植面积达2000hm2;但由于林地土壤条件不同,多为种子繁殖苗木造林,加之经营措施粗放,林分生长差异较大。本文通过对成都地区引种栽培的巨桉人工林生长情况及立地条件调查,提出了影响巨桉林生长的主要立地因子为土壤酸减性、土层厚度和土壤肥力。成都发展巨桉短轮伐期工业原料林,应选择在平原区,海拔800m以下的低山丘陵区,并且土层厚度在40cm以上的酸性至中性土壤立地条件。在土层深厚肥沃、地势平缓、立地条件好的造林地,造林株行距可采用2m×4m。对个体分化严重的人工林,应从抚育间伐、去劣留优和增施有机肥、培肥地力等方面改良群体结构和生长环境,提高单位面积蓄积量。     

长茂滩林场固沙造林调查研究

用主导因子法划分了定边县长茂滩林场的立地条件类型，用定量分析和定性描述相结合的方法，研究了各乔、灌树在各种立地条件类型上的生长状况，林学特性，固沙效益等。提各种树适宜的立地条件及各立地条件下适选的树种，林型（林带或片林）及造林方式。     

Soil and foliar phosphorus as indicators of sustainability for Pinus radiata plantation forestry in New Zealand

We investigated how multiple-crop forestry has influenced the magnitude and variability of soil and plant phosphorus (P) fertility and site disturbance. Kinleith Forest, on Mamaku Plateau, covers >100,000 ha and comprises mainly plantation Pinus radiata. Three study areas in the forest were chosen to represent natural state (native forest), first crop of P. radiata (24 years growth), and second crop of P. radiata (4 years growth of second crop). The adjacent areas have similar relief and climate, and the soils are all the same age, being predominantly Andic Haplohumods developed in 1770 calendar-year-old non-welded tephra (Taupo Ignimbrite, ca. 0.5–0.8 m in thickness) and overlying a buried paleosol on earlier tephric material.

Soil properties were compared using a random geometric sampling scheme stratified in a 40-m grid. Soil samples (0–20 cm) were taken at 1.5, 4.5 and 13 m spatial intervals in random directions away from each primary node, providing 192 sample sites for each study area. Additionally at selected sites, samples of the current year's foliage from the upper crowns were collected, the thickness of Taupo Ignimbrite (i.e. depth to buried paleosol) was recorded by augering, and site disturbance was assessed using a new six-point scale based on change relative to a modal soil profile. Geostatistics and geographical information systems (GIS) were used to assess variability and effects of forest management on the measured properties. Soil Bray-2 P concentrations were below guidelines for satisfactory growth (12 mg kg⁻¹) at all sites, and no differences were recorded between the different management areas. However, the amount of within-site variability in Bray-2 P increased with the number of crops. Foliar P concentrations were only marginally deficient in both the first and second crops, indicating that P is currently not significantly limiting growth. The lack of difference in foliar P between first and second crops indicates no crop-to-crop decline in foliar P status and suggests that no site P fertility decline has occurred. The soils have an unusual ability to continue releasing P through successive sequential extractions in the Bray-2 P test, indicating a strong buffering capacity, and this may explain the apparent lack of deficiency even with Bray-2 P values of <12 mg kg⁻¹. The site disturbance index increased and the spatial distribution of P data became increasingly variable with crop rotation.

GIS, inverse-distance weighting and kriging proved useful in illustrating the trends between crops. The spatial variability of results indicated that there was no obvious pattern to the variability and that more site-specific forest management in the region would be difficult. However, there was some evidence that less disturbance during harvesting may minimise variability of soil P supply.