以木麻黄Casuarina equisetifolia 1年生幼苗为实验对象,采用重金属Cd污染土盆栽实验,研究添加秸秆生物炭、泥炭、凹凸棒土3种钝化剂对木麻黄生长情况、膜质过氧化和渗透调节等的影响,分析木麻黄对Cd胁迫的耐受机理.结果表明,在中度以上Cd(2.52 mg·kg-1)胁迫条件下,木麻黄依靠可溶性蛋白质和可溶性糖等渗透调节物质对膜质过氧化进行修复,维持正常的生长状态,5个月时的高生长效率、地径生长效率分别达到种植初始值的2.5倍以上和14倍以上,表现出对Cd胁迫较强的适应能力;单独添加5％的秸秆生物炭、泥炭和凹凸棒土3种钝化剂可有效减轻Cd胁迫危害,3种钝化剂处理木麻黄幼苗叶片中MDA的含量分别为对照的39.3％,84.1％和94.3％;通过多重比较和聚类分析认为单独添加5％的秸秆生物炭的综合钝化效果最好.木麻黄作为多功能树种,在土壤重金属污染修复方面具有较大应用潜力.

Egg-shaped ruantiao baisha mutant and 30 loquat germplasms from China,Japan and New Zealand were used as plant material and contrast,respectively in this paper. Identification of the mutant germplasm were constructed with SRAP molecular marker based on the morphological investigation. 18 pairs of primers were selected from 96 pairs of SRAP primers. Finally,135 loci were detected,of which 102 were polymorphic and the polymorphic percentage was 75. 6%. The genetic similarity ranged from 0. 53 ~ 0. 89. 31 white pulp loquat germplasms were divided into four groups at the similar coefficient of 0. 65. The loquat germplasms came from Zhejiang province were clustered together into the first group. The second group contained 19 germplasms which came from China,Japan,and New Zealand. The third group included Shanghai baisha and Guangxin bami. The fourth group included Bailizhi and Longcai bai. The genetic simlity between egg-shaped ruantiao baisha and the other contrasted germplasms ranged from 0. 55 to 0. 88. It had the maximum GS with Bailizhi( GS = 0. 88),and minimun GS with Wugongbai( GS= 0. 55),while the GS between egg-shaped ruantiao baisha and ruantiao baisha was only 0. 73. Study of biological characters showed that egg-shaped ruantiao baisha and ruantiao baisha had significant differences among fruit shape,seed number,and edible rate. As the comprehensive results,the egg-shaped ruantiao baisha had significant genetic variation with ruantiao baisha loquat,and it should be a mutant germplasm. The study would be of great practical significance to new varieties innovation and protection of intellectual property rights for loquat mutantgermplasm.

通过对路桥区林业生态建设比较优势和存在问题的现状分析,认为创建森林城市对提升城市品位、构建和谐社会与小康社会、创造良好人居环境和拓宽环境治理模式等方面意义重大,并对如何开展森林城市创建提出建立组织机构、编制建设规划、开展森林文化宣传等七方面的建议。

通过气候条件、区位优势等方面分析路桥区花卉苗木产业现状,针对问题提出今后的发展对策:抓住重点,扩大基地建设;扶持龙头企业和专业示范户;注重高新技术的应用与技术推广;加大招商引资力度;抓好市场建设与培育。

松材线虫病防控关系到一个地区生态安全和经济发展,探索松材线虫病防控的有效措施重大意义。以台州市路桥区为例,通过对该区松材线虫病防控形势的分析和治理对策的探讨,指出存在的问题及下一步工作重点。

浙江省台州市路桥区以创建浙江省"森林城市"为平台推进国土绿化取得了显著成效,但还存在投入不足、条块分割、城乡失衡、好大喜洋等问题。今后发展应坚持下列原则:以人为本,生态优先;找准载体,搭好平台;城乡统筹,协调发展;因地制宜,多快好省。

<正>葡萄冬季管理是关系到葡萄固本复壮和次年产量、品质的重要一环,加强冬季管理应抓好以下几个环节。1科学冬剪1.1冬剪作用通过冬剪让枝蔓合理均匀分布在葡萄架面上,使葡萄均匀地挂在架上,