长江护岸林欧美杨无性系混合造林研究

为提高长江护岸林的生长量,减少虫害,进行了杨树多系混合造林研究。结果 江护岸林欧美杨多系混合造林较单系造林生长量和年利润率均提高１５％以上,天牛虫株率控制在３％以内。选育出４个优良无性系,材积生长量较１－６９杨（对照）提高１８．４％～４７．５％。对参试欧美杨无性系进行了生长阶段和生长等级的划分。表７参４。     

Changes in the Relationship Between Temperature During the Seed‐Filling Period and Soya Bean Seed Isoflavones Under Water‐Deficit Conditions

Isoflavones have been shown to have health‐promoting activities in humans and are particularly abundant in soya bean. This study was conducted to determine how water deficit during seed fill affects the already known relationship between temperature and, alternately, solar radiation with soya bean seed isoflavone content. Isoflavone profile was analysed from seed samples of commercial cultivars grown in 76 environments in Argentina (29–38°S). Significant explanatory multiple linear regressions were detected for total isoflavones (TI), aglycones (AGL), glucosides (GLC), malonyl glucosides (MAL) and acetyl glucosides (ACE) regarding the following: temperature during seed fill (Tm_R5R7) and precipitation minus potential evapotranspiration during the reproductive period (pp‐PET_R1R7), as well as for the combinations of these climatic variables. Cumulative solar radiation predicted isoflavone content but was less robust than Tm_R5R7 and pp‐PET_R1R7. To our knowledge, this is the first report of changes in the relationship between TI, as well as AGL, GLC, MAL, and ACE and Tm_R5R7 as a function of drought in the field. When pp‐PET_R1R7 was below 70 mm (indicating drought), TI, as well as AGL, GLC, MAL, and ACE decreased linearly with rising temperatures and with increasing water deficit (decreasing values of pp‐PET_R1R7), with both climatic variables exhibiting additive effects on isoflavones. Our results also suggest that water deficit (estimated by pp‐PET_R1R7) would be important for modelling the relationship between temperature and soya bean seed isoflavones in rainfed crops.     

Schedule of Two level Multi object based on Relatively Prior Weight

The default of conventional schedule is expounded, which only emphasizes on system's overall object but overlooks sub system's local object. A mathematical model of two level multi object is put forward. The concept of relatively prior weight is defined, and a heuristic algorithm is given out. The results of computer simulation show that the algorithm is effective.     

豫南地区红豆杉多目标经营技术

红豆杉为国家一级重点保护野生植物,它是集材用、药用、观赏、绿化于一体的珍稀树种。本文综述了红豆杉在豫南地区用作材林、药用原料林、盆景和观赏林的主要经营技术。     

发展我国企业年金制度的几点思考

随着全球公共养老保险而临的困境，各国政府纷纷对传统的养老保险进行改革。在改革过程中,企业年金发挥了越来越重要的作用。本文主要对企业年金制度在国内外的发展 展开讨论，并提出发展我国企业年金制度的初步设想。     

空调制冷系统多级断续调温的计算机控制方案探讨

对计算机控制的空调制冷系统提出一种新的多级断续调温控制方案．它除了具有较高精度、执行器简单、造价低等优点外，还能减轻启动造成的供电电源过载，并能延长机组使用寿命     

14个多年生黑麦草品种幼苗期对干旱胁迫的生理影响

为筛选抗旱能力强的多年生黑麦草品种,研究了14个多年生黑麦草(Lolium multiflorum L.)品种叶绿素(Chl)、超氧化物歧化酶(SOD)、丙二醛(MDA)和脯氨酸(Pro)生理生化指标对不同梯度干旱胁迫的影响,并运用隶属函数进行了耐旱性综合评价。结果表明:在干旱胁迫下各品种间叶绿素(Chl)含量和超氧化物歧化酶(SOD)活性呈先上升后下降的趋势,丙二醛(MDA)和脯氨酸(Pro)的含量均呈上升趋势,经耐旱性综合评价(隶属函数)耐旱强弱性顺序依次为:雷神4守门员启萌金顺凯蒂沙匹克威爱神特天马金牌美达利球道德北极品龙卷风博士新速2号。     

宁夏平原农田防护林几种树种配置模式综合效益的初步研究

应用技术经济学的原理与方法,对宁夏平原７种不同树种配置模式的抗虫效益、经济效益从定量角度进行评价,并在单项评价的基础上,运用多目标灰色局势决策方法对林带的抗虫效益、经济效益、生态效益和社会效益进行了综合评价．结果表明：①新疆杨与高感天牛杨树品种混交林带的综合效益优于单一杨树品种的林带,新疆杨２行×合作杨２行,实际株数比６∶４的混交模式综合效益较好;②臭椿纯林也是一种综合效益较好的树种配置模式,但臭椿的一些特性又限制了其在农田林网上的发展．     

多分屑槽钻尖的数学模型

多分屑槽钻头适合大走刀量高效率钻削加工，为解决多分屑槽钻尖在数控机床上的刃磨问题，建立了新型钻尖（多分屑槽钻尖）的数学模型，介绍了分屑槽钻尖数学模型的求解方法。     

转TaLEA基因小黑杨株系变异及生长稳定性分析

以6个地点栽培的11个转TaLEA基因小黑杨株系及1个对照株系为材料,对2年生株系的树高和地径进行调查分析。方差分析结果表明:树高、地径在不同地点间、不同株系间的差异达极显著水平(P＜0.01),株系×地点间的交互作用达显著水平（P＜0.05）;不同地点12个小黑杨转基因株系2年生树高平均值变化范围为128～235 cm,地径变化范围为13～24 mm;不同地点参试株系树高和地径变异系数变化范围分别为19.84%～33.38%和24.21%～49.16%;重复力变化范围为0.497～0.952,表明相同地点不同株系树高和地径差异较大,但差异主要由遗传因素控制,有利于株系选择。采用Tai模型对各株系的遗传稳定性进行评价,其中XL11株系为不稳定株系,其他11个为稳定性较强的株系。根据各株系的稳定性参数和树高与环境的交互作用效应值,预测了各株系的适生地区,其中XL9、XL1、XL14等3个株系在6个试验地点的生长量大、稳定性强,是6个试验点推广的首选株系。