Geography Reference
In-Depth Information
This study simulated the climatic effects of cultivated land reclamation in
Northeast China during 2030-2040. The simulation results indicate that it will
inevitably aggravate the drought disaster in Northeast China. In summary, the
regions with the most extreme temperature change are mainly located in the
northern part of Great Khingan Mountains and Lesser Khingan Mountains; while
the regions with the significant precipitation change mainly gathered in the
northern part of Great Khingan Mountains and Songnen Plain. Since these regions
are located in the major grain producing areas in Northeast China, the climate
change due to the cultivated land reclamation will have great impacts on the grain
yield in Northeast China.
4.1.3 Concluding Remarks on the Cultivated Land
Reclamation
The change of the spatial pattern of land use in Northeast China in the future, mainly
including the expansion of cultivated land, will influence the supply function of
regional ecosystem services to some degree. It should be noted that although the
cultivated land area in Northeast China will show an increasing trend, the population
will increase more rapidly, which will lead to the reclamation of some marginal land
that is not very suitable for reclamation. Since the rapid population growth will lead
to more demand for the food and land resources, some problems such as the defor-
estation, reclaiming land from lakes, and grassland reclamation, may be more serious
and lead to a vicious cycle. Besides, some of the newly increased cultivated land may
be not reasonably used, and the extensive operation is still very widespread, which
will inevitably lead to the deterioration and waste of the land resources. The decline
of soil fertility will undermine the potential of grain yield increase, influence grain
production capacity of Northeast China, and subsequently influence the grain pro-
duction capacity of whole China, and consequently threaten the self-supply of grain
and national food security. It is necessary to properly implement some measures in
the planning of the future agricultural development in Northeast China on the pre-
mise of guaranteeing the strategic grain demand of the whole nation. Besides, it is
necessary to improve the scientific and technological level of agricultural cultivation,
promote the ecological construction, and enhance the land utilization rate. In addi-
tion, it is necessary to implement different agricultural production countermeasures
according to the impacts of climate change on different crops in different regions,
e.g., adjusting the of the layout of crop variety and planting structure, enhance the
measure to prevent disasters so as to ensure the long-term and steady development of
grain production.
The temperature will show an increasing trend on the whole, which will have
negative impacts on the growth of the major crops, such as rice, corn, soybean, and
wheat. The regional climate change will also directly and indirectly influence the
behaviors of the peasants. For example, it will directly lead to the change of the
planting structure and tillage measures; besides, it will lead to the change of the
