北京百花山地区土系鉴定及其在不同土壤分类体系中的分类与制图参比

根据中国土壤系统分类的原则和方法 ,将北京百花山地区的 16个土壤剖面分类为 10个土系 ,并将这 16个土壤剖面分别按中国土壤系统分类与地理发生土壤分类系统进行分类参比 ,结果表明 ,土系与土种单元在性质上基本一致 ,以它们为基础进行大比例尺调查制图所得图斑也必然相似 ;而在土系与土种以上的分类阶层 ,因为所使用的分类标准不同 ,两个分类系统划分的分类单元和据此进行的制图图斑则不一样 ;以土类为基础进行小比例尺制图 ,使用中国土壤系统分类只能复区制图 。

南岭成矿带中段广西花山地区成矿模式探讨

在野外调查和综合研究基础上,将南岭花山地区主要成矿类型分为面状矽卡岩型锡矿、蚀变断裂破碎岩型锡矿、云英岩化碎裂花岗岩破碎带型锡矿、断裂破碎充填型铅锌矿、离子吸附型稀土矿五种主要成矿类型,初步建立了区内主要找矿模式,并就找矿中需要注意的问题及主攻类型、找矿区位进行了讨论。

江夏花山地区矿山地层研究

矿山地层研究是找矿工作中的关键一步。花山地区隶属扬子地台成矿区的长江中下游成矿带。由于花山地区第四系覆盖严重,所以多数地层罕有露头,仅有志留纪地层、泥盆纪地层和二叠纪地层的露头广泛出露。区内主要出露地层有志留系坟头组(S_(2)f),泥盆系云台观组(D_(3)y),泥盆系黄家磴组(D_(3)h),石炭系黄龙组(C_(2)h),二叠系孤峰组(P_(2)g),第四系早中更新世的王家店组(Qp_(2)w)和晚更新世的青山组(Qp_(3)q)还有全新世的走马岭组(Qhz)。

Study on the Comparison of Arthropod Communities in Three Kinds of Cruciferous Vegetable Fields at High Mountainous Area

[Objective]This research aimed to compare arthropod communities in different cruciferous vegetable fields at high mountainous area and provide guidance for pest control. [Method] The main arthropod species in 3 kinds of erueiferous vegetable fields at high mountainous area were investigated, the composition of arthropod community in different vegetable fields were analyzed. [Result] The main arthropod species in erueiferous vegetables fields at high mountainous area were similar, but had different quantity compositions. The richness was the highest in radish field. [Conclusion] Crop species had great influence on biological community; we should focus on the main pests in the process of pest control.

Long-tongued Fly for Pollinating Long Corolla-tubed Alpine Ginger

The genus Roscoea is an alpine ginger group endemic to the Himalayan regions.It exhibits the suites of floral traits that would fit pollination by long tongued insects.However,previous studies revealed that the original long-tongued insect pollinators of Roscoea have been lost from North Indochina due to recent climate change in the Chinese Himalayas.