| Lanzhou is one of the cities on the Silk Road.The government also strengthen the management of Lanzhou.During the Kangxi period,the court set up Gansu Province,the political area of Lanzhou is fixed,whose jurisdiction include Didao state,Hezhou,Gaolan County,Jinxian,Jingyuan County,Weiyuan county.To Qinghai,Xinjiang must pass through Lanzhou region.At the beginning of the Qing Dynasty,the court transport rations also go through here.Many northwest and inland goods often exchange here,the trade in Lanzhou is development.Lanzhou region political,economic,transportation,military status is clearly very important.These factors and conditions conducive to the Lanzhou area of agricultural production and people’s lives.Crop cultivation is also affected by natural and human factors.The natural conditions in Lanzhou are relatively poor compared with the mainland.Lanzhou area deep northwest region,away from the sea,the climate is cold,drought and rain;several large plateau intersection here,high terrain,complex terrain,these conditions are obviously not conducive to crop cultivation;local natural disasters often occur,more emphasis on natural conditions Destruction of agricultural production.In the early Qing Dynasty,the Lanzhou area was affected by the war,the population and the fields were destroyed.The late Qing Dynasty,only gradually restored and increased.Under the influence of tense human relations,the productivity of the original fields is declining,and people gradually reclaim new land and turn to the development of land on the hillside and beach land.The development of multiple types of land provides land for the cultivation of diverse crops.However,Lanzhou people are unwilling to succumb to the harsh conditions of nature,the development of water conservancy,create sand fields,the creative use of local natural resources to develop agriculture.The Yellow River flows through Lanzhou,tributaries,Lanzhou states have water distribution.Lanzhou water has a long history of development and deep foundation.In the Qing Dynasty,the rapid is faster,the level is higher than that in Ming Dynasty.In order to adapt to the "low water high" situation,the use of water trucks to the height of the river can not reach the highlands.Government management of water conservancy is relatively perfect.To ensure effective irrigation of land,it set up special management,strict regulation of the order of irrigation,length,width and so on,Sand is the local people to change the climate cold,dry and drier,poor soil and other natural conditions according to local conditions of the invention,to moisture,heat preservation,moisture.But the sand,the cost of sand is 1.5 times than the water conservancy construction.Water conservancy and the use of sand fields to protect the crop cultivation and growth required for hydrothermal conditions.In the Qing Dynasty,the crops area inherited the farming tradition in China.The food crops were dominated by the traditional "grain,crops.The cash crops were tobacco,cotton,oil crops and herbs.The horticultural crops were vegetables and melons.During this period,there are some varieties of new crops in Lanzhou area,for example,corn,tobacco,pumpkin,pepper and so on.Corn,potato has been planted in Lanzhou area.which it as a commodity for sale and sold in the country.Cotton can not grow in Lanzhou area,people try to grow cotton success.As a result of water conservancy,sand fields and ZuoZongtang policy guidance,cotton in Lanzhou area promotion.Cotton in Lanzhou only existed for seven or eight years.Because of the socio-economic reasons,cotton in Lanzhou area is difficult to open the market,and then affected the local cotton cultivation eventually abolished.Planting crops affect the local agricultural development,social economy,people’s lives and the ecological environment.Crop cultivation is conducive to farmland development,land use,increase food production,enrich people’s daily life,economic crops can bring much earnings,which link agriculture,industry and business together.From the long-term development point of view,the development of local agriculture destroyed forest vegetation,resulting in soil erosion,soil desertification,destruction of the fragile ecological environment. |