Results 61 to 70 of about 427 (193)
野生动物学报, 2003 马麝（Moschus chrysogoster）属麝科、麝属,是麝属动物中体形较大的一种,国内主要分布于西部高原山地,如青海、甘肃.新疆、西藏等地,青藏高原是其分布中心。在宁夏,马麝仅分布于贺兰山（含西坡内蒙古自治区）,这是马麝在我国分布的最北缘。马麝是珍贵的药用动物,国家一级重点保护野生动物。
胡天华, 李涛
doaj
Calcium Distribution in the Stigma and Germinating Pollen of Lycium barbarum [PDF]
, 2007 用焦锑酸钾沉淀法对宁夏枸杞柱头和花粉中的钙离子分布进行了研究.结果显示,宁夏枸杞柱头表皮有一覆盖层,其中有许多含钙沉淀颗粒的小泡,当花粉落到柱头后从覆盖层中吸水,在萌发孔的表面上聚集了较多的钙沉淀颗粒.同时,花粉内部出现许多含钙的小液泡,使花粉体积增大,内部产生膨压,花粉萌发;生长在覆盖层中的花粉管顶端穿过覆盖层小泡时,附近聚集了较多的钙沉淀颗粒,在花粉管壁上也附着较多的细小钙沉淀颗粒.萌发的花粉粒中由大液泡占据,在其亚顶端的细胞质中,聚集较多钙沉淀颗粒的线粒体膨大形成了一些含钙沉淀颗粒的小液泡 ...
宋玉霞, 杨淑娟, 田惠桥, 邓桦
core
Shuitu Baochi Xuebao, 2018 为研究和比较贺兰山山杨、青海云杉、油松单根和根土复合体的力学特性，通过单根拉伸、三轴压缩、饱和渗透试验测定了3种乔木单根和根土复合体的力学参数及土水特征曲线。结果表明：3种乔木单根力学特性存在显著差异，且直径对单根的力学特性有显著影响。单根最大拉力与直径成幂函数相关，随直径增大而增大；单根抗拉强度、杨氏模量与直径成对数函数相关，随直径增大而减小。山杨单根平均最大拉力（0.38 kN） > 青海云杉（0.25 kN） > 油松（0.17 kN）；山杨单根平均抗拉强度（33.39 MPa） > 青海云杉 ...
田佳 +4 more
doaj
Study on soil seed bank and seedling regeneration of different populations of Amygdalus ledebouriana in wild fruit forest in Tae Basin [PDF]
[Objective] The study aims to investigate the soil seed bank and seedling regeneration characteristics of Amygdalus ledebouriana in Xinjiang, and to explore the limiting factors affecting the population regeneration of A . ledebouriana.
Akejulidezi Nurgailide +5 more
core +1 more source
野生动物学报, 2019 2006—2008年和2016年，在宁夏贺兰山国家级自然保护区，利用粪便显微组织学分析技术并结合痕迹检测法和直接观察法对马鹿阿拉善亚种（Cervus elaphus alashanicus）春季食性进行了研究。从15个沟系中采集马鹿粪便复合样本60个进行分析。结果表明，马鹿春季取食的植物属15科33种（属），食物中各种植物的干重组成比例RD>1%的植物有11种（属），其中小红柳（Salix microstachya var.bordensis）占比41.86%、山杨（Populus davidiana ...
王志勇 1 #孟德怀 2 #骆颖 2 滕丽微 2 +1 more
doaj
Comparison of earthquake monitoring capability of the Ningxia network before and after completion of the early warning project [PDF]
Post the completion of the Ningxia sub-project of the National Earthquake Intensity Quick Report and Early Warning Project, the number and distribution of stations in the Ningxia network have changed greatly.
Hao Tang +4 more
core +1 more source
Study on the Changes of Cell Wall Polysaccharide and Their Degrading Enzyme Activities during the Development of Lycium barbarum Fruit [PDF]
To further explore the metabolism of Lycium barbarum polysaccharides, the cell wall microstructure of Lycium barbarum fruits in different growth periods was observed by transmission electron microscopy, and the cell wall polysaccharide content and its ...
BU Ning-xia +6 more
core +1 more source
Effect of Different SO2 Addition Levels Before Fermentation on Italian Riesling Dry White Wine Quality(发酵前不同SO2添加量对贵人香干白葡萄酒品质的影响) [PDF]
Shipin kexue jishu xuebaoItalian Riesling wine grapes, a white varietal grown from Helan Mountains East Foothill region in Ningxia were taken as raw materials. Dry white wine was made by conventional winemaking methods and Saccharomyces cerevisiae was added.
WANG Zixin(王紫昕) +6 more
doaj +1 more source