Spatio-temporal distribution of sergestid shrimp Acetes intermedius in the coastal waters of southwestern Taiwan

SUMMARY: Spatio-temporal variation of the sergestid shrimp Acetes intermedius in the coastal waters of southwestern Taiwan was investigated based on 1546 samples collected by 13 commercial fishing vessels from July to October 1996. Adult sergestid shrimp started a down-estuary migration with the increased river discharge associated with heavy summer rainfall. Fishing season for this species was to commence after that. In July, the shrimp stock was found on the shallow continental shelf off Tungkang and Fangshan. They mainly aggregated in Kaoping Canyon off Tungkang during August and September occurring at very high densities. In October, the shrimp returned to the coastal waters off Tungkang and Fangshan at lower densities. The heavy rainfall is a factor that triggers the shrimps to make a down-estuary migration that could reduce competition for food between adults and their offspring during the period of high river discharge. When the northeast monsoon prevailed, the sergestid shrimp moved back to the estuaries and the fishing season was terminated.     

实生板栗高接换冠技术的研究

采用多种嫁接方法在改造大龄实生板栗上进行不同时间和嫁接时对树冠的不同处理的试验，结果表明，应用挖骨皮接、插皮接、切腹接的最佳时期是在树体萌芽前１０ｄ至萌芽期（即３月中旬左右），段木芽接法宜在３月上旬前进行为好；１树１桩嫁接成活率较１树多桩低，当１树少于４桩嫁接时，适当留１～２个辅养枝可提高成活率，且对接芽生长影响不大．     

马杜霉素和泰妙菌素联合应用对雏鸡新城疫抗体水平的影响

试验将不同剂量的马杜霉素和泰妙菌素分别添加到雏鸡的饲料和饮水中同时使用,通过检测不同组别雏鸡血清中ND血凝抑制效价,探讨马杜霉素和泰妙菌素不同剂量联合应用时对雏鸡免疫功能的影响。试验结果表明:正常推荐剂量的马杜霉素5mg/kg与泰妙菌素10mg/kg联合使用时,一般不会对机体免疫造成明显伤害;应用马杜霉素10mg/kg拌料能明显造成机体免疫系统伤害,当其与正常或加倍剂量的泰妙菌素联合应用更会加重对机体免疫功能的不良影响,致使抗体水平下降。     

气助式静电喷雾靶标物背部沉积特性

为了研究气助式静电喷雾中，药液雾化特性对其靶标背部沉积效果的影响，采用Ф80mm的西红柿果实作为靶标，配制1g／L的刚果红溶液模拟农药进行喷雾试验．运用OLID测试系统对不同施药条件（气体压力、静电电压、喷雾距离）下药液的雾化特性进行了测试，借助分光光度计定量分析靶标背部沉积量，结合试验结果对药液雾化特性与靶标背部沉积效果的关系进行了分析和讨论．结果表明：非静电喷雾时，雾滴不易粘附于标靶背部，与荷电喷雾时相比，背部沉积量较小可以忽略；在气动力和静电力的前后作用下，雾滴的粒径随气体压力、静电电压的增加而减小且分布愈均匀；增加气体压力、静电电压均可提高药液靶标背部的沉积量，其中静电电压影响最大；荷电啧雾时，雾滴的粒径愈小分布愈均匀有利于荷电药液在靶标物背部沉积．     

水量平衡理论在林业生产中的应用

本文简述了水量平衡这一基本理论及其在确定森林覆盖率、人工植被的营建、节水灌溉及径流林业等方面的应用,并对应用中存在的问题做了具体的分析。     

现代林业的实质及运行的耦合机理

分析现代林业产生的背景,提出现代林业是中国现代化进程产物,是解决中国社会森林生态产品和经济产品短缺、林区发展落后的时代产物.现代林业具有技术的先进性,效益的综合性,功能、目标的多元性,资产性与市场的开放性,产权的明晰性与安全性特征.认为现代林业是森林生态体系、林业产业体系和生态文化体系动态耦合成的一个复合系统,以实现生态、经济和文化的协调发展为目标.从生态-产业-文化的耦合阈,机制耦合和目标耦合,探讨了现代林业复合系统的耦合运行机理.认为实现现代林业发展的保障在于技术、管理和组织的创新及其各自现代化水平的提高.     

草坪无土栽培基质的研究进展及发展趋势

 该文介绍了国内外草坪无土栽培基质的研究现状；从草坪无土栽培基质的选择原则、基质理化生物学性质及基质研究方法3方面，阐述了我国草坪无土栽培基质的研究情况；并从无土栽培基质的结构、生产工艺、基质栽培中根际营养及管理技术方面阐述了我国草坪无土栽培基质的研究方向及未来发展趋势。     

The influence of wax-sizing on dimension stability and mechanical properties of bagasse particleboard

Bagasse particleboards (BPBs) were made using polymeric methylene diphenyl diisocyanate (pMDI) resin as binder and wax emulsion as dimension stabilizer. A factorial experiment was conducted to measure the effects of wax and pMDI resin content on particleboard dimension stability and mechanical properties. The data were compared with respective properties specified in the ANSI A208.1 standard for commercial M3 grade wood-based particleboard.Wax-sizing improved the linear expansion (LE) of the particleboards under both pMDI resin contents used in this research and all LE values were controlled under the critical value of 0.35%. The use of wax significantly reduced 24-h water absorption and thickness swelling compared to the control panels without wax. Wax-sizing at the moderate levels also showed positive influence on long-term water absorption and thickness swelling properties. Wax content levels, however, did not significantly influence water absorption and thickness swelling behavior. Wax-sizing had no evident negative effects on the bending properties of MDI-bonded bagasse particleboards under both resin contents, while it caused slightly negative effect on internal bond strength. Mechanical properties of all boards far exceeded the minimum values specified in ANSI A208.1 standard. The entire properties of the 5% pMDI BPBs were better than those of the 3% pMDI panels as expected.     

棉籽饼粕脱毒方法研究进展

棉籽饼粕含有丰富的蛋白质,但同时也含有对畜禽有毒害作用的游离棉酚。研究适宜的脱毒方法脱除或钝化棉籽饼粕中的游离棉酚,使之变成优质的蛋白质饲料,对缓解我国蛋白质饲料资源不足和促进饲料工业的发展具有重大的现实意义。本文从棉酚的结构、中毒症状谈起,综述了目前棉籽饼粕主要脱毒方法的效果和优缺点,同时对研究中存在的一些问题提出了看法和改进建议。     

杂交籼稻Ⅱ优598的选育及栽培技术

Ⅱ优598以Ⅱ-32A×浙恢205配组而成的籼型三系杂交稻。该组合株型适中，分蘖力中等，丰产性和稳产性较好，米质优，中抗稻瘟病，感白叶枯病，感褐稻虱，适合衢州地区作单季稻种植，2009年通过浙江省农作物品种审定委员会审定。