检索结果-南通市图书馆

橡胶六点始叶螨Eotetranychus sexmaculatus(riley)的生物学研究

热带作物学报 1983年第1期 85-90页

作者：杨光融林延谋华南热带作物科学研究院植保研究所

发现六点始叶螨在海南岛一年可有23代,卵到成螨的发育期,成螨期和生活历期分别为8.7±0.7～28.4±2.4天,10.3±6.5～32.0±17.5天和19.2±5.1～55.6±13.7天。雌雄螨一生均能交配多次,每代平均产卵量为11.1±8.1～39.4±24.7个,雌螨一... 详细信息

发现六点始叶螨在海南岛一年可有23代,卵到成螨的发育期,成螨期和生活历期分别为8.7±0.7～28.4±2.4天,10.3±6.5～32.0±17.5天和19.2±5.1～55.6±13.7天。雌雄螨一生均能交配多次,每代平均产卵量为11.1±8.1～39.4±24.7个,雌螨一生的产卵量为1～114个,每个雌螨每天的产卵量为1～5个,卵的孵化率在95％以上,雌雄性比为1.8:1(雌螨/雄螨)。同一橡胶品系不同物候期的叶片对六点始叶螨的发育期,成螨期与产卵量有明显的影响,但品系的不同则无明显影响。

关键词：产卵量叶片平均 Eotetranychus sexmaculatus riley 雌雄性比橡胶树园艺作物六点始叶螨产卵前期生物学研究

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Biomass Production of Cup Plant (<i>Silphium perfoliatum</i>L.) in Response to Variation in Plant Population Density in the North Central USA

引用

American Journal of Plant Sciences 2019年第6期10卷 904-910页

作者： Arvid Boe Kenneth A. Albrecht Paul J. Johnson Jixiang Wu Agronomy Horticulture and Plant Science Department South Dakota State University Brookings SD USA Department of Agronomy University of Wisconsin Madison WI USA Insect Biodiversity Laboratory South Dakota State University Brookings SD USA

The North American genus Silphium is receiving global attention for its potential in the development of new food, forage, and industrial crops, including cellulosic biomass for biofuel. Little is known about the effect of plant population density on biomass production in large, coarse perennial forbs. Our objective was to evaluate the effect of variation in plant density on biomass production and stand morphology of cup plant (Silphium perfoliatum L.). Plant population densities of 17,000, 34,000, and 68,000 plants ha-1 were evaluated for biomass production in a single-harvest per annum system for three years at Brookings, SD and Arlington, WI. Biomass increased linearly by 43% between the low and high density at Brookings;whereas, at Arlington, response to variation in plant density was year dependent. Shoots plant-1 was inversely related to plant density with linear regression explaining >95% of the variation. Our results strongly suggested that further studies of effects of plant population density on biomass production in cup plant should include evaluation of, in addition to, densities higher than 68,000 plants ha-1.

关键词： Biofuel Shoot Density Shoots Plant-1 Stand Morphology Cup Plant Moth Eucosma giganteana riley Biotic Stress Abiotic Stress

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomass Production of Monocultures and Mixtures of Cup Plant and Native Grasses on Prime and Marginal Cropland

引用

American Journal of Plant Sciences 2019年第6期10卷 911-924页

作者： Arvid Boe Kenneth A. Albrecht Paul J. Johnson Jixiang Wu Department of Agronomy Horticulture and Plant Science South Dakota State University Brookings SD USA Department of Agronomy University of Wisconsin Madison WI USA Insect Biodiversity Laboratory South Dakota State University Brookings SD USA

To date, most candidate systems for producing herbaceous cellulosic biomass have been composed of monocultures of perennial or annual grasses. Ecosystem goods and services provided from these biomass feedstock production systems could be increased dramatically with mixing of one or more forb species that would increase biodiversity and provide habitat for pollinators. Cup plant (Silphium perfoliatum L.) is featured with many desirable characteristics, such as high biomass potential, adaptation to marginal soils, and attractiveness to pollinators, desirable in a dicot species to grow in mixtures with perennial warm-season grasses. The objective of this study was to compare cup plant, switchgrass (Panicum virgatum L.), and prairie cordgrass (Spartina pectinata Link) monocultures to their mixtures for biomass production on prime and poorly drained marginal crop land for two years in both South Dakota and Wisconsin. In Wisconsin, monocultures of prairie cordgrass and cup plant and their mixture produced more biomass (8.1 Mg·ha-1) than the switchgrass monoculture and switchgrass/cup plant mixture (5.3 Mg·ha-1) on both prime and marginal land. While in South Dakota, drought and meristem destruction by the cup plant moth (Eucosma giganteana riley) caused large reductions in biomass production (1.7 Mg·ha-1) in both years, with the switchgrass/cup plant mixture on marginal land having the highest yield (2.1 Mg·ha-1). Our study showed binary mixtures of cup plant and native warm-season grasses have great potential for increasing biodiversity and other ecosystem goods and services, relative to monocultures, for sustainable biomass feedstock production on poorly drained marginal land in the northcentral USA.

关键词： Silphium perfoliatum L. Switchgrass Panicum virgatum L. Prairie Cordgrass Spartina pectinata Link Bioenergy Pollinators Eucosma giganteana riley Ecosystem Goods and Services

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

英国riley公司推出新型仿麂皮起绒机

引用

纺织导报 1993年第5期 68-68页

作者：吴同兴

英国riley公司致力于改进常规riley Velsuede五罗拉立式仿麂皮起绒机。全新的Velsuede Mark Ⅲ型仿麂皮起绒机吸取了多年来以及纺织品表面整理机械制造的经验,具有一系列的先进性能,大大扩展了起绒整理和织物整理的概念,改善织物整理的... 详细信息

英国riley公司致力于改进常规riley Velsuede五罗拉立式仿麂皮起绒机。全新的Velsuede Mark Ⅲ型仿麂皮起绒机吸取了多年来以及纺织品表面整理机械制造的经验,具有一系列的先进性能,大大扩展了起绒整理和织物整理的概念,改善织物整理的适用性。该机已制造成功,并计划销往中国。该机可加工易变的、难以加工的织物。当棉、合纤织物通过立式仿麂皮起绒机的5个包覆磨料的工作辊时。

关键词：起绒 riley 织物整理工作辊先进性能合纤机械制造膨松单独传动设计范围

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：