描述:
duction in the area is
restricted by disadvantageous natural resources and environmental conditions,
including low arable land area per capita, frequent drought events and a landscape
dominated by mountains. Forage crop rotation systems could improve soil fertility,
increase crop外eld and provide quality forage supplies for livestock production.
Additionally, their adoption is considered a suitable means to advance sustainable
agriculture development. In this study, the role and status of forage crop rotations in
Tianshui city were studied.
描述:
an City, Hanzhong City and Yangling region in
Shaanxi Province, and on the basis of domestic and foreign literature, this paper describes the
Practice and Enlightenment of the development of domestic and international kiwifruit
industry,and analyses the status, problems and advantages of Shaanxi’s kiwifruit industry,
discusses the principles of developing Shaanxi kiwifruit industry, market positioning and
planning, proposes the Suggestions of the development of Shaanxi’s kiwifruit industry.
描述:
siea. Low temperature is the key factor that limits
the growth, colour and appreciatability in winter in the northern of China. Introducing foreign gene
into kale through genetic engineering may create novel variety with cold tolerance. In this study,
BADH(encoding betaine aldehyde dehydrogenase) and TCH(encoding transcription regulation
factors) were used to be transformed into kale with Agrobacterium-mediated transformation.
描述:
large-scale farming tool that can
water
continuously from the ground-surface water in the rivers, lakes, or pools, and is mainly applied to lifting
water to the high ground or drain water in the low-lying farmland. Due to the reason that the traditional
描述:
mic
development. The fourth chapter discusses the change of marriage culture from
aspects of ethnic intermarriage, uxorilocal marriage and village marriage. The
fifth chapter mainly investigates and analyzes present situation and characters
of Han immigrants' religion belief on Tibetan Buddhism, discusses fusion
between Han's folk custom and Tibetan Buddhism. The sixth chapter detailed
describes the process of funeral ritual, and illustrates characters and function of
funeral ritual.
The seventh chapter chooses six variables, namely inhabitation pattern,
individual communication, language use, religion belief, national consciousness
and social distance, to comprehensively considerate ethnic relation, furthermore
concludes the characters of ethnic relation and puts forword several
suggestions.
The eighth chapter is concluding remarks to this topic, which discusses
characters and trends of Han immigrants' cultural change, and concludes
characters,influencing factors and tendency of ethnic relations in Haixi
immigrant region.
Haixi Autonomous Prefecture of Qinghai province lies at northern
Qinghai-Tibet Plateau. Most areas are alpine and hypoxia, and natural
condition is very bad, which is unfit for agriculture production, so it has been
the habitation of nomadic minority groups. As the border area, the past
dynasties continuously recruited and migrated Han immigrants to Haixi region
to open up waste land and garrison the frontier in order to maintain national
stability and secure territorial integrity. For thousands years, in order to
improve living environment, develop economy and build multiple cultural