黄山北草核的核型和G带带型研究

本文研究了北草晰的核型和G带带型,结果表明,北草蝴的染色体数2。二38,由18对常染色休和 1对性染色休组成．常染色体可分成三组：1组有2对染色体;11组包括15对染色体;而川组仅含 1对微小染色体。性染色体为ZW型．这个种的染色体均为端部着丝粒,其AN二38包括1对Z染色 体）,从核型特征上看,可能是晰蝎类中较原始的种。从G带显示结果可见,北草晰的各染色体对均有 其特有的带型,容易辨别。     

“北星二号”蚯蚓的繁殖试验

“北星二号”蚯蚓是从日本引进的,具有蛋白质含量高,易饲养,饲料来源广,产量高;是鱼禽畜的理想动物性饲料源,年繁殖率可达5.281倍。温度、饲料、湿度,pH是影响繁殖率高低的基本因素。     

中国北叩甲属一新记录种

本文记述北叩甲属Ｄｉａｃａｎｒｔｈｏｕｓ １中国新记录种：横纹北叩甲Ｄ．ｕｎｄｏｓｕｓ（Ｌｅｗｉｓ）。     

灰色多目标局势决策在晋西北植树造林中的应用

采用灰色多目标局势决策方法确定了晋西北地区不同土地类型上的最佳造林树种．在梁峁坡地、阴沟坡地、阳沟坡地和河滩地上的最佳造林树种分别是柠条、油松、刺槐和杨树     

南海北部琼东南盆地崖北凹陷Y-8-X井晚渐新世—更新世钙质超微化石

对南海北部琼东南盆地崖北凹陷Y-8-X井1 338.1～3 086.1 m井段内的110块样品进行了钙质超微化石分析,发现上部1 338.1～2 075.7 m地层含较丰富的钙质超微化石,而下部2 091.0～3 086.1 m井段化石丰度低或未见。根据钙质超微化石标志种的存在,识别出NN17带、NN15带、NN11带、NN6带、NN4带和NP25带等6个钙质超微化石末现面事件,由此对该井的生物地层进行了划分,认为研究井段的地层时代为晚渐新世—更新世,推测本井缺失了部分中新统沉积。依据钙质超微化石总丰度、分异度及特征性环境指示属或种的丰度变化,探讨了1 338.1～3086.1 m井段的沉积环境演化过程,可分为6个演化阶段。从晚渐新世至更新世,经历了海水由浅变深再变浅的过程,其中早中新世早期水深最浅,中中新世—早上新世水体温暖且水深最大。     

桂西北典型喀斯特区生态服务价值的环境响应及其空间尺度特征

Study on ecosystem service values (ESVs) is the bridge of understanding ecosystem and economic decision-making. To investigate the response of ESVs to ambient environment and their spatial scales is an urgent work in the process of ecological restoration and sustainable development in southwest China. Based on the previous research results, the remote images, and weather data of 31 years (1975-2005), the response of ESVs to ambient environment and their spatial scales in a typical karst area of northwest Guangxi, China were evaluated with the method of empirical mode decomposition (EMD) in this paper. The results showed that ESVs had obvious variations with changes in elevation, rocky types and soil types, and had corresponding characteristics of spatial scales. The ESVs in middle and low elevation areas were higher, but they decreased due to human activities such as deforestation. The ESVs in peak-cluster depression areas were lower, and they would increase as influenced by policies such as returning farmland to forestland. The ESVs were influenced by rocky types, showing lower values but an increasing trend in the typical karst regions while higher values but a decreasing trend in non-karst regions. The average ESVs in the west part of the study region, which is not only the main nature reserve for rare wildlife species in Guangxi, but also one of the best preserved natural vegetation regions in China, were more than 15,000 RMB Yuan ha-1,. Comparatively, the ESVs were less than 10,000 Yuan ha-1 in the middle part of the region attributed to low vegetation coverage, serious peak-cluster depression and karst rocky desertification. After about 20 years, that is from 1985 to 2005, the ecosystem conditions had been improved and the ESVs had increased in the middle and eastern part of this study region. On the contrary, in most western part, which was dominated by subtropical evergreen broad-leaved forest, they had been worsened, and the balance values of ESVs were negative. As for the relationships of ESVs with rocky types and soil types, lime soil and red soil were the two main soil types that contributed to ESVs (The total contribution was above 60%, and it is 63.77%,64.37%,64.56%,64.91% respectively in the four years of 1985, 1990, 2000 and 2005.). The variance contribution of intrinsic mode function (IMF) and trend (R) showed that there were obvious special sales for ESVs in this study area, and the main spatial scales were about 2.7 km, 5.5 km, and 11.6 km. The variance contribution ratio was 12.29%, 11.26%, 11.49% respectively, and the trend (R) was high (17.74%). In conclusion, this study indicated that ecosystem conditions in the typical karst area were improved owing to the application of rocky desertification control policies, such as ecological migration and returning farmland to forestland. Besides, the main spatial scales of ESVs in the study area were the interactions of terrain, physiognomy, land use / land cover and human activities.     

药用植物北五味子的组织培养

取北五味子带腋物嫩茎作为植体,培养于附加同种类和浓度激素的ＭＳ培养基上,在附国加６－ＢＡ２．０＋ＺＴ０．１ｍｇ／Ｌ时,诱导芽的效果最佳;在附加６～ＢＡ２．０＋ＮＡＡ０．２＋ＺＴ０．１ｍｇ／Ｌ时,芽的增殖率最好,在附加ＮＡＡ０．２ｍｇ／Ｌ时,生根效果最佳,当苗高２．０～２．５ｃｍ根数达３－５条时,开瓶锻炼２天,移栽于消过毒的土壤中,１０天后,成活率达１００％。     

国产萱草属夜间开花类群的分类研究

在《中国植物志》第14卷中,萱草属Hemerocallis夜间开花类群被处理为3个独立的物种,北黄花菜、黄花菜和小黄花菜。但是,它们之间因严重的性状重叠和交叉,用单个性状如花数、花被管长度、根的直径等区分它们极为困难。本文根据国产干标本和栽培材料,对9个常用检索性状以及核型做了定量分析。另外,这3个类群的地理分布式样表明,它们似乎是不同的地理宗,因为三者替代性分布在由暖湿到旱冷的气候梯度中。本文结论是,将三者处理为同一物种北黄花菜的3个亚种也许更令人信服,即原亚种北黄花菜,亚种黄花菜和亚种小黄花菜。