林芝地区松口蘑营养成分

以西藏林芝地区林芝、波密、工布江达3个县采集的野生松口蘑子实体为材料,测定其外观大小及粗多糖、粗蛋白、游离氨基酸、铁和锌等营养成分含量,并与其它地区的松口蘑营养成分含量进行比较。结果表明:林芝县松口蘑铁含量显著高于其它区域;林芝地区松口蘑菌盖直径4.0~7.1 cm、菌柄长5.9~8.6 cm,与内地松口蘑菌盖直径5.9~21.5 cm、菌柄长5.0~18.0 cm相比,个体较小;粗多糖、粗蛋白和锌含量较低,而粗脂肪和铁的含量较高。     

Combining Plant Growth with Nutrient Content Measurements as a Method to Compare Nutrient Use by Different Raspberry Cultivars

ABSTRACT

Monthly above-ground destructive sampling and partitioning of the plant into distinct component parts for growth and nutrient element (N, P, K, Ca, Mg, Na, B, Cu, Zn, Fe and Mn) analyses were used to compare elemental compositions in two red raspberry (Rubus idaeus L.) cultivars (‘Willamette’ and ‘Haida’) grown in a uniformly managed field plot. Quantitative measurements showed that the two cultivars had different growth patterns. ‘Haida’ yielded greater fresh berry weight and dry matter content than ‘Willamette’ on a per floricane basis, but, because of fewer ‘Haida’ than ‘Willamette’ floricanes in the plot after standard commercial pruning practices, fresh berry yield was similar for both cultivars on a unit area basis. ‘Haida’ berries ripened slightly earlier than ‘Willamette’. Stem, lateral and leaf growth differed between the two cultivars. Although only whole above-ground accumulation (kg ha-1) of one (Ca) of the ten elements measured was different in the two cultivars, the amounts and patterns of all nutrients in the various plant components of floricanes and primocanes differed in significant ways. In some cases, element concentrations in a specific plant component differed between cultivars while dry matter accumulation differed in the opposite way resulting in the same total accumulation in the cane involved. In other cases, there was greater accumulation in one cane type (primocane vs. floricane) than the other such that there was similar accumulation of that element in the whole plant. For Ca, accumulation in primocanes was greater for ‘Willamette’ than ‘Haida’ whereas there was no difference of accumulation in floricanes which resulted in greater accumulation of Ca in the whole above-ground plant in ‘Willamette’. Maximum accumulation of the elements in floricanes occurred generally earlier in the growing season (July to September) than in primocanes (September to October), and these maxima were frequently at different times for the two cultivars, making comparisons of nutrient compositions in the two cultivars complex. Detailed sampling periodically over the growing season in combination with element analysis of these raspberry plant components as done in this study provided a better basis for comparing nutrients in raspberry cultivars than examining element concentrations of a specific plant component (e.g., leaves) sampled once during the growing season because patterns of nutrients over time in the cultivars differed.     

地理信息技术在黑龙江省森林管护经营工作中的应用

介绍了黑龙江省森工国有林区森林资源管护经营地理信息系统构建采用的关键技术、系统的功能及其在森林资源管护经营中的应用。     

森林防火信息系统中GIS数据库的建立

介绍了中日信息化合作项目森林防火信息系统及GIS数据库的建立方法、数据内容和有关数据的处理,这一方式具备建立和管理大数据量的GIS数据库的能力。     

沙地云杉林植物区系特征的研究

根据野外调查,分析了沙地云杉林的植物区系成分,进行了种子植物的统计并得出结论:在沙地云杉林中,共有161种植物,分别属于49科,123属。其中1种蕨类植物,2种裸子植物,158种种子植物。共有10种地理成分分布类型,其中以达乌里-蒙古成分占优势,内蒙古自治区的特有成分只有沙地云杉一种。根据优势成分分析,发现在乔木层中只有沙地云杉和白桦达到存在度的4~5级,灌木层中只有黑果木旬子木达到5级。根据相似系数比较发现:沙地云杉林有56.8%的科、47.4%的属、47.4%的种与大针茅草原相同;有60.8%的科、22.3%的属、7.2%的种与长白山的典型暗针叶林相同,因此沙地云杉林仍然属于暗针叶林范畴。     

福建永安桃源洞种子植物区系地理成分分析

永安桃源洞风景区内种子植物129科423属757种,隶属10个科分布区类型和14个属分布区类型。具有地理成分复杂,热带成分明显,温带成分较多,起源古老和特有成分丰富等特点。     

森林资源管理信息系统体系结构的探讨

介绍了应用程序设计体系结构的设计问题,分别讨论了各级应用程序的特点,并重点讨论了三级应用程序设计的特点及其优势。最后提出在林业资源管理信息系统的设计中采用的三级设计模式和具体的设计思路。     

试论城市地理信息系统建设

数字城市的核心是城市地理信息系统,城市地理信息系统的建设是一项庞大、复杂的系统工程。本文对城市地理信息系统建设时应具备的发展思路及相关基础技术进行了较为详细的论述。     

湖南针叶林的区系特征及地理分布

对湖南针叶林的区系特征及地理分布进行分析研究,结果表明,湖南针叶树种资源丰富,其区系计有6科19属37个种和变种。其中构成现代森林的属种有松科的松属(4种)、铁杉属(2种),冷杉属(2种),以及银杉和黄杉;杉科的杉木和柳杉;柏科的柏木和福建柏;罗汉松科的竹柏和红豆杉科的穗花杉等。表明湖南是我国针叶树特有属、单型属、少型属和残遗森林群落的重要保存中心。起源亦很古老。必须采取措施加以保护。