描述:
he paper studies from the situation and feature of Agriculture
Tri-dimension Pollution in Yellow River Basin areas, and divides it into several regions according to
basin’s pollution feature by adopting the method of searching documents , research, systems analysis,
quantitative and qualitative analysis and so on, and analyzes the problem of Agriculture Tri-dimension
Pollution in Yellow River Basin areas from the view of tri-dimension and system by use of the theory of
Environmental value, Technology Value, Ecology, Circular economy , uses System Dynamics to track
dynamically the change in the future of the various variables in different modes and constructs the
system mode of agricultural tri-dimension pollution in Yellow River Basin, and simulates the system;
描述:
isasters in China,
the earthquake caused the largest number of deaths accounted for 54% of the total
number, and 80-90% of China's earthquake occurred in rural areas.
描述:
conducted full irrigation (CK),
mild regulated deficit irrigation and moderate regulated deficit irrigation with melon varieties
of Ymdi and Yujinxiang in three growth stages including sowing to flowering time, flowering
to fruit expanding stage and fruit expanding to picking time.
描述:
be given when fully and rational use of local
climatic resources such as solar radiation, heat and water, while other conditions (such as soil
fertility, carbon dioxide concentration, cultivation level etc.)
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:
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:
t carrier means, in the industrialization
process, rel如ng on local brand or geographical advantages of the brand to develop the regional
economy has become more and more countries and regions choices.