Characteristics of Nutrient Contents and Evaluation of Nutritional Value of the Alpine Grassland Plants in the Source Area of the Yellow River北大核心CSCD

In order to explore the characteristics of nutrient contents and scientifically evaluate the nutritional value of the alpine grassland plants in the source area of the Yellow River, the plants of the five different alpine grasslands were selected as the research objects, and the content of crude protein (CP), ether extract (EE), crude fiber (CF), crude ash (CA), total phosphorus (TP) of the plants were determined. At the same time, the principal component analysis method was used for quantitative comprehensive evaluation of the plants nutritional value. The results showed that the CP content of the plants in all alpine grasslands was between 12.78%~15.35%, the EE content was between 2.63%~3.38%, the CF content was between 17.56%~25.16%, the CA content was between 5.52%~11.53% and the TP content was between 0.11%~0.27%. The order of nutrient value of plants in different alpine grassland from high to low was: degraded alpine meadow > native alpine meadow > swamp meadow > degraded alpine steppe> native alpine steppe;The order of yield per unit area of the total nutrients of plants in different alpine grasslands from high to low was: swamp meadow > native alpine meadow > native alpine steppe> degraded alpine steppe> degraded alpine meadow;The order of nutrient value of different plant species from high to low was: Leguminosae>Forbs >Cyperaceae>Gramineae. © 2019 Authors. All rights reserved.     

The biodiversity of the Albertine Rift

The Albertine Rift is one of the most important regions for conservation in Africa. It contains more vertebrate species than any other region on the continent and contains more endemic species of vertebrate than any other region on mainland Africa. This paper compiles all currently known species distribution information for plants, endemic butterfly species and four vertebrate taxa from the Albertine Rift. The literature on fish species richness and endemism is also reviewed to assess the importance of the larger lakes in the Rift for conservation. We use data from 38 protected and unprotected areas to prioritise sites within the Albertine Rift for conservation based upon their numbers of endemic and globally threatened species. Virunga and Kahuzi Biega National Parks and Itombwe Massif in Democratic Republic of Congo, Bwindi Impenetrable and Kibale National Parks in Uganda, and Nyungwe National Park in Rwanda rank highest in terms of numbers of both endemic and globally threatened species. Six conservation landscapes are described that include most of these sites and it is argued that a focus on these landscapes may be a more holistic method to ensure the safety of the priority areas of the Albertine Rift.     

运用植物打造低碳生活

随着全球工业经济的发展、人口的剧增、人类欲望的无限上升和生产生活方式的无节制,全球气候面临越来越严重的问题,二氧化碳排放量越来越大,地球臭氧层正遭受前所未有的危机,全球灾难性气候变化屡屡出现,已经严重危害到人类的生存环境和健康安全。为此,人们提出＂低碳生活＂（low-carbonlife）新概念,是指生活作息时所耗用的能量要尽力减少,从而减低碳,特别是二氧化碳的排放量,以减少对大气的污染,减缓生态恶化。本文通过对绿色植物能够吸收大量二氧化碳及有毒气体等进行分析,指出绿色植物在营造低碳生活中将会发挥巨大的作用。     

Rubidium ‐ availability and plant uptake in natural soils

Abstract

High soil acidity (low metal ion saturation) favours the absorption of Rb from natural soils by vascular plants and fungi, whereas the absorption of K is little or not influenced. The difference in Rb uptake may be as great as one order of magnitude between soils of high and low acidity. Results of several studies are presented and discussed.     

乡土植物营造地方特色园林景观探讨

本文提出了乡土植物营造地方特色园林景观的创作途径,归纳了"一本三元"的乡土植物营造地方特色园林景观的创作手法,同时以重庆地区乡土植物营造地方特色园林景观作了实例探讨。     

Foliar application of selenite to barley plants low in selenium

Abstract

Experiments with foliar application of selenite to barley crops were carried out on a number of Danish farms during the years 1975 to 1979. The plants were treated at the growth stage of Feekes 4–6 with 2.5, 5 and 10 g Se/ha, and analysed for selenium at harvest. The conclusion from the results is that spraying of 3–5 g Se with a detergent at about Feekes 5 is a safe, cheap, and effective way of preventing an outbreak of selenium deficiency in livestock mainly feeding on cereals.     

论泰国曼谷与孔敬市热带地区园林植物造景的特点

总结出曼谷与孔敬市热带地区具有重视保护人工与自然林、创建小型丛林,重视树木的修剪,与其他景观要素的结合,城市中随处可见神树与神龛,花园的营造等园林植物造景特点,还对热带地区园林植物造景研究的意义提出看法。     

常熟市虞山园林植物病害调查

本调查是常熟市虞山风景区综合考察内容之一,野外标本采集时间为1984年6月30日至1985年5月17日,共采集园林病害标本307份,文中列出经过整理的病害名录有240种,其中危害较重的有20多种,给虞山风景区的环境保护和修复扩建提供了有用的资料。     

湖南长沙生态入侵植物群落重要值研究

利用3个特征指标综合为重要值的定量方法,测定入侵植物在群落组成中的地位与作用.结果表明:生态入侵植物分布的生境类型表现出多样化;在各区域中,入侵植物种类随着人为活动干扰的强度的增加而先增后减,其对当地生态系统结构和功能以及生物多样性的影响是随着人为活动干扰的强度增加而增加.根据样地中群落优势种和外来植物重要值的情况确定了危害最严重的几种外来植物是空心莲子草、吊球草、两耳草、婆婆纳.     

大气中SO2气体污染物对植物的危害与影响

通过介绍烟囱里排出SO2气体污染物的种类方式与实例,阐述了大气中SO2气体污染物对植物危害的方式,论述了SO2气体污染物危害植物的化学机理,并在分析SO2气体污染物对主要植物（竹子、水稻、棉花等）危害及影响的基础上,提出了降低SO2气体影响的建议。