国外青少年信息行为研究

从青少年的阅读行为、网络信息行为以及日常信息行为3个方面分析了国外青少年信息行为的特点，并对我国青少年信息素质的培养提出了建议。     

泉州市农村科技信息网络构建与应用

应用现代信息技术构建了泉州市农村科技信息网及其网络信息服务系统,开发了专题数据库,为＂三农＂提供网上信息服务,促进科技信息进村入户到企,助推海西现代农业发展和新农村建设。     

食用加工型花生品系筛选试验

以泉花7号为对照,对9个花生品系进行农艺性状和丰产性比较筛选试验,结果表明:9161和9164综合性状优良,表现优于对照,可以进一步示范种植。     

不同投饵率对暗纹东方鲀幼鱼生长的影响

比较投饵率水平分别为3%、4%、5%、6%时,对暗纹东方鲀幼鱼生长、饲料效率的影响,以确定暗纹东方鲀幼鱼阶段的适宜投饵率。在23℃下,对规格为3.45～3.56g的暗纹东方鲀幼鱼进行30d的生长实验,结果表明:不同投饵率对暗纹东方鲀幼鱼的特定生长率、质量相对增加率、饲料效率、存活率均有显著影响(p<0.05);暗纹东方鲀幼鱼的适宜投饵率为4%,在投饵率为4℅时,质量相对增加率为116.04±0.04%,饲料效率达83.70±0.02%,特定生长率为111.49±0.03%/d,存活率为84.44±0.02%。     

大黄鱼幼鱼内陆可控生态精养技术初探

采用可控生态精养技术在内陆养殖大黄鱼幼苗,经过166 d养殖,大黄鱼平均体重由0.1 g增至48.1 g,平均体长由1.5 cm增至16.5 cm,饲料系数0.97,存活率44.1%,养殖过程实现零换水,零用药。     

罗源湾夏季鱼卵和仔稚鱼种类组成与数量分布

分析研究了2009年7月福建罗源湾鱼卵、仔稚鱼的种类组成及数量分布。共鉴定19种鱼类的鱼卵和仔稚鱼,隶属于13科。其中,鱼卵10种、仔稚鱼14种。夏季,罗源湾水平拖网鱼卵和仔稚鱼平均密度分别为1.80 ind/m3和0.54 ind/m3;垂直拖网鱼卵和仔稚鱼平均密度分别为4.11 ind/m3和2.63 ind/m3。鱼卵、仔稚鱼以鳀科数量最多,优势种类为中颌棱鳀(Thrissa mystax)和康氏小公鱼(Stolephoruscommersonli)。与历史资料相比,不但种类数减少,且优势种由多科鱼类并存向鳀科鱼类为主转变。夏季鱼卵、仔稚鱼主要分布在罗源湾中北部海域及湾口附近。     

福建省热区经济发展现状及热带农业发展对策研究

回顾分析了近年来福建热区经济发展现状及主要特点，探讨该省热带农业发展潜力及存在问题，并针对性提出福建热区做大做强热带农业的对策建议。     

Demographic strategies of a dominant tree species in response to logging in a degraded subtropical forest in Southeast China

Key message

The demography of pioneer tree species ( Pinus massoniana Lamb.) is significantly affected by logging in Southeast China. Logging negatively affects the population growth rate of P. massoniana , which facilitates the growth of individual trees but has no effect on reproduction probability. The survival and growth of seedlings contribute the most to population growth.

Context

Subtropical forest degradation caused by unreasonable disturbances is closely related to anthropogenic activities in Southeast China, and the frequent small-scale logging activity by local people was the dominated disturbance regime in forests in this region over the past several decades.

Aims

The objective of this study is to evaluate the demographic consequences of logging on Pinus massoniana, a pioneer tree species, at individual level (survival, growth, and fecundity) and population level (the population growth rate and size distribution) over short-term period.

Methods

The size of tree individuals was combined with vital rates using various modeling approaches based on demographic data from three annual censuses. The integral projection model (IPM) was constructed and used to conduct comparative demographic analyses.

Results

Logging negatively affected the population growth rate: from a slight expansion before logging to a moderate decline after logging. This study found a significant reduction in seedling recruitment after logging, and plant growth and mortality were slightly enhanced. The survival of seedlings greatly contributes to population growth rate compared to other life stages for both periods (before and after logging) while its relative importance decreases after logging. Seedling growth is also important to population growth, and its relative importance increased after logging. Shrinkage and fecundity have a minimal contribution effect on the population growth rate.

Conclusion

Growing plants in a nursery with a similar demography to P. massoniana could be beneficial for pioneer species regeneration in that this will improve the survival rate and growth of small individuals after logging.

     

花椰菜晚熟品种比较试验

引进11个晚熟花椰菜品种进行品种比较试验,结果显示:福花90天生长势强,松花绿梗,商品性好,比对照品种庆农85增产12.40%,差异达极显著水平,可作为漳浦县中晚熟花椰菜品种进行示范推广。     

优质甜瓜品种“新银辉”春季大田高产栽培技术

新银辉是适宜福建省明溪县春季大田种植的高产、优质、高效甜瓜新品种.该文总结新银辉春季大田高产栽培技术.