海南苦瓜反季节栽培技术

海南是天然的大温室，我国南菜北运的主要基地之一，苦瓜是其中的一种主要蔬菜，栽培技术要求高。选用适当品种，加强栽培技术，对于提高其产量和品质，具有十分重要的意义。     

不同比例添加微胶囊包裹复合微生态制剂对保育猪生产性能的影响

本试验采用U6（63）均匀设计，选取体重在11kg（杜×（长×大））三元杂交猪84头，按性别体重随机分为7个处理组，每纽2个重复，每个重复6头，探讨微胶囊包裹复合微生态制剂按不同比例组合后再按不同的添加比例对保育猪生产性能的影响。通过30d的初步试验，结果表明：试验四组日增重明显高于对照组差异显著（P〈0．05）和其他各组；日采食量差异不显著（P〉0．05）。同时，平均料重比（饲料利用率）优于一、二、三组，但与对照组相比，但差异不显著。表明微胶囊包裹复合微生态制剂按不同比例复配、添加，能显著提高保育猪的采食量和生长速度。并确定了使保育猪生长性能达到最佳的水平的微生态组合范围，为养殖生产提供了依据。     

苗圃改造型休闲观光农业园规划设计——以安徽芜湖天鹰苗木生产基地为例

休闲观光苗圃以苗木生产为基础，兼顾休闲观光功能的开发，而构建休闲观光苗圃景观的核心是观赏植物．从主题定位与规划构思、总体布局与功能分区、项目设计与道路系统优化等方面对天鹰苗圃进行改造规划，提出苗圃旅游开发规划应依据的6大原则和3大功能分区的划分方法．     

高产、抗虫大豆新品种吉育91号的选育

吉育91号大豆新品种是吉林省农科院大豆研究中心于1996年以抗虫品系公交91144—31为母本，吉丰2为父本进行有性杂交，经系谱法选育而成。主要特点是高产、稳产性强、抗食心虫、抗病、油份含量较高。     

大豆超高产示范及其栽培技术研究

采用最新培育的大豆新品种"汾豆65",通过"促控促"栽培技术模式,在0.14 hm2面积上获得实收667m2产323.1 kg的高产.对该高产示范地块实现超高产的栽培技术进行探讨.     

Comparative analysis of factors in the adoption of traditional and recommended soil erosion control practices in Nigeria

In developing countries, there is a general dearth of empirical information on the socio-economic and agronomic variables needed for planning environmental management programmes. Much of the existing evidence on the adoption of soil erosion control practices come from the advanced countries and concentrate on the recommended ones which are not usually easily adopted by farmers. Using cross-sectional data from a sample of 125 small farmers in highly erosion-prone Anambra State of Nigeria, this paper attempts the isolation of the major factors influencing farmers' adoption of traditional and recommended soil erosion control practices. Multiple regression results show that income, farm size and risk attitude were the most important factors in the adoption of recommended practices while employment, farm output prices and interest rate influenced the adoption of traditional practices most. Also a chi-square test rejects the hypothesis of significant difference between factors determining the adoption of both clusters of practices. It is recommended, among other things, that it is these implicated variables that should be focused on in erosion control practice adoption programmes.     

日本落叶松采穗圃管理技术研究

对日本落叶松采穗圃的经营管理研究结果表明：以日本落叶松采穗圃母株定干１４０ｃｍ 、骨干枝长度４ ～６ｃｍ 、４ 月中旬采条最有利于母株生产出更多的优良穗条。母株不同部位的插条，其生根率无明显差异，但母株上部插条的扦插苗高度显著高于中下部插条的扦插苗高度     

A multilevel model with clustered management practices differentiating dairy herd environments in southeastern Sicily

Herd environments constitute productivity potentials, or aggregate opportunity outcomes, resulting from management actions taken with the available inputs. Management outcomes from cow nutrition, udder health and milking practices were quantified with the help of surveys of 254 dairy producers in southeastern Sicily. Objectives were to disentangle environmental opportunities by disaggregating herd effects into causal inputs. Average ME milk production was 8640 kg/lactation for the 183 Friesian herds containing 35 lactating cows and 10 dry cows. Seventy-one Brown Swiss herds averaged 6443 kg ME milk from 25 lactating and 10 dry cows. For Friesian (Brown Swiss) herds 10 (11) management practices affected milking performance and 9 (8) practices influenced somatic cell concentration (P<0.05). Multilevel analysis and herd clustering procedures differentiated low from high opportunity herd environments but altering relative weightings among management practices did not further discriminate them. This clustering methodology helps ensure unbiased estimation of management input effects and could help target priority management substitutions and technical support priorities in dairy extension programs.     

Do ungulates preferentially feed in forest gaps in European temperate forest?

Ungulate populations across Europe have been strongly increasing over the past decades. Simultaneously with this increase, concerns about the impact of ungulates on forest systems, and forestry specifically, are increasing. In this study we discuss how the common forestry practice of creating clear cuts in relatively homogenous, managed forests may increase the potential impact of ungulates. Growth of trees in full light conditions is generally higher, but due to higher photosynthetic activity they tend to have higher C:N ratio in their leaves thus decreasing food quality. Next to that, biomass of herbaceous vegetation is enhanced in clear cuts. These changes likely affect foraging decisions of ungulates and it has been suggested that ungulates forage in forest gaps rather than in closed forest. We tested this hypothesis by using an experimental approach. The experiment was conducted in the Białowieża Primeval Forest in Poland, where a full assemblage of native large herbivores occurs. Six plots (6 m × 6 m) inside small clear cuts were compared to six control plots in adjacent closed forest. To exclude the effect of differences in number and species composition of available tree saplings, equal numbers of trees saplings of five species were planted at each plot. Ungulate visitation frequency and visitation time were measured by means of three methods: track plots, camera- and video trapping, and pellet counts. Visitation frequency of all ungulates combined (European bison, red deer, roe deer, moose and wild boar) was almost twice as high inside forest gaps compared to closed forest. Also cumulative visitation time by all ungulates tended to be higher inside forest gaps. Red deer showed the strongest preference for gaps, and duration of single visits was almost seven times longer for forest gaps than in closed forest. The observed preferential foraging of ungulates in forest gaps leads to an uneven distribution of their browsing behaviour. Hence, the creation of forest gaps by clear cutting followed by reforestation provides attractive foraging patches for ungulates potentially leading to high damage. In this way, forestry practices may enhance damage of ungulates to plantations especially when due to management the surrounding forest has a low carrying capacity for ungulates. We suggest that there is much to gain if management approaches would focus at influencing foraging behaviour of ungulates and reduce their concentration in forest gaps, rather than purely focusing on population control.     

诱根钵和栽培基质对紫穗槐幼苗生长的影响

为了促进苗木须根的生长,实现全年、全冠移栽,以凹凸壁多孔盆为诱根钵,研究了不同基质配比对紫穗槐幼苗生长的影响。结果表明:诱根钵苗在基质1中的叶面积、叶片数、株高分别高于普通钵59.3%、20.3%、53.1%;但其他基质作用不明显。诱根钵对幼苗根系的诱导作用更大,且基质1中效果最好,主根长、须根数、根系干质量分别高于普通钵71.7%、77.0%、30.7%。诱根钵与基质1和基质2的组合使植株干质量和鲜质量增加,其中基质1中的植株地上鲜质量、地下鲜质量、地上干质量、地下干质量分别高于对照58.4%、29.5%、91.5%、30.7%。建议该容器的开发应与基质和管理技术配套。