嘉兴城区公园木本观赏植物调查研究

对嘉兴市城区10个公园的绿地木本观赏植物的种类、生长状况、景观配置等调查结果显示：共有观赏树木157种,乔木∶灌木∶藤本比例为82∶64∶11,落叶树种与常绿树种之比为86∶71,各树种生长良好,但存在养护管理技术跟不上,树种配置时对立地条件考虑不充分等问题。     

白三叶草和多年生黑麦草根系间钾和钙的转移

设计并运用两段培养基方法研究了白三叶草和多年生黑麦草根系间钾和钙的转移.结果证实这2种牧草混生时,根系生长在一起,可以通过“根-根接触”和“外流-再吸收”等方式进行养分转移.介质中钾浓度为0.1mmol/L 时,2种牧草钾转移量差别不大;钾浓度为1.0mmol/L 时,白三叶草接受转移的钾高于多年生黑麦草.介质中钙浓度1.0～5.0mmol/L 时,白叶三草接受转移的钙量都高于多年生黑麦草.     

浅淡垂枝植物在园林造景中的应用

近年来,垂枝型植物在园林中的应越来越广泛,具有很好的观赏价值和市场前景。文章分析了垂枝植物美化功能,探讨了垂枝植物在园林造景中的应用。     

川中丘陵区生态农业建设途径研究

在人多地少的川中丘陵区,广开饲料资源和大力发展养殖业是生态农业建设的突破口;以家庭为单元的多样化经营则是充分利用资源、促进商品经济发展的重要过渡形式;对物质和能量的多层次循环利用、提高能量转换和物质循环效率乃是提高生态经济效益的重要环节。     

吉林省主要园林树木开花历

对吉林省长春、四平、吉林等城市主要园林树木的花期、花色进行了多年的观测。依据其开花时间的先后顺序排列成园林树木开花历,为我省园林绿地设计、树种选择及配置提供参考依据。     

四川桂花种质资源研究

对四川地区桂花种质资源进行了系统调查,共记录该地区桂花种质151份,对其现状和分布特征进行了分析,并对其相关观赏性状进行了评价。从而为四川桂花种质资源的保护和合理开发提供依据。     

The influence of water stress and air velocity on growth of Impatiens walleriana and Petunia × hybrid

Impatiens walleriana ‘DeZire’ and Petunia × hybrid ‘Tidal Wave’ were subjected to a combination of water stress and exposure to wind to evaluate the potential application of these treatments as an alternative to chemical growth retardation. Air velocities evaluated were 0.1, 0.2, 0.4, 0.8, 1.5, and 4.5 m s⁻¹ and irrigation treatments were either control or 45% water stress based on irrigation occurring when the weight of the plant (plant, pot and peat) was reduced by 25% (control) or 45% (water stress) of the initial weight. The experiment was repeated twice; once in spring and once in summer.     

基于淘宝平台的观赏水草种类应用与分析

观赏水草是水族箱的重要组成部分,其消费日渐成熟。淘宝在售的观赏水草有淡水观赏水草17科22属96种(含品种),海水观赏水草10科11属13种。其中,淡水观赏水草有20种只具有观赏用途,占总种数的20.83%;76种兼具稳定水质和观赏用途,占总种数的79.17%。海水观赏水草有3种只具有观赏用途,2种兼具观赏和净化水质的用途,8种具有观赏、净化水质和饲用3种用途。淡水种类绝大部分都是外来种,仅13种在中国有分布,仅占总种数的13.54%;海水种类由于海水传播的特殊性,均为全球广布种或东太平洋种类。     

观赏竹开发与应用研究进展

为了合理开发利用、丰富园林绿化景观,提升中华竹文化品位,根据多年来对观赏竹栽培利用的实践经验,分析了观赏竹种开发现状与发展前景,对我国的观赏竹种资源、园林美学特征、观赏竹在园林中的配植方式和造景效果进行了概述,并对观赏竹在福建省等地的广泛应用实例进行了分析。     

Morphological development and nutritive value of herbage in five temperate grass species during primary growth: analysis of time dynamics

In a 2‐year field experiment, morphological development and measures of the nutritive value of herbage for livestock during primary growth in Meadow foxtail, Tall oatgrass, Cocksfoot, Perennial ryegrass and Yorkshire fog were investigated. All measured variables were affected significantly by both species and sampling date, and their interaction (P < 0·001), in the period of primary growth. Changes with time in mean stage weight for Meadow foxtail and Cocksfoot were different from the other species due to their indeterminate growth habits. Mean stage weight of Tall oatgrass and Yorkshire fog increased more rapidly than that of Perennial ryegrass with time. Changes in mean stage weight with time were described by linear, parabolic and sigmoid relationships. Crude protein (CP) concentration of herbage was higher for Cocksfoot and Meadow foxtail than for Perennial ryegrass. A parabolic relationship of CP concentration with time was typical for all the species. Concentrations of neutral‐detergent fibre (NDF) and acid‐detergent fibre (ADF) in herbage of the species differed most during the mid‐period of primary growth. Their increases with time showed curvilinear (sigmoid and parabolic) relationships. Perennial ryegrass had lower concentrations of both NDF and ADF in herbage than the other species. Differences between the in vitro dry matter (DM) digestibility among the grasses increased in mid‐ and late periods of primary growth. Perennial ryegrass had higher values for in vitro DM digestibility but the difference from other species was small in the early period of primary growth and from cocksfoot in the late period of primary growth. In vitro DM digestibility showed, in most cases, a sigmoid and, in others, a linear decrease with time. Principal component analysis showed that perennial ryegrass and meadow foxtail were the most distinctive of the species in characteristics relating to morphological development and the nutritive value of herbage to livestock.