Discussion on New Concept of Modern Agricultural Water-saving Sustainable Water-saving －Starting from Development of Xinjiangs Agricultural Irrigation in Last 50 Years
The paper analyses firstly the condition of water-land exploitation and water-saving irrigation in Xinjiang in last 50 years.In the recent 50 years,the irrigation area has been developed from 120 × 104hm2 to 462.69 × 10hm2.And the irrigation water demand increased from 160 × 108m3 to 460 × 08m3.There is 882.4× 108m3 water of stream flow in Xinjiang.Instead of 37.8 × 108m3 water which is in high plateau and desert area,the utilizable surface water volume is 844.6 × 108m3.In fact,it is 400 × 108m3 surface water which can supply to national economy.It is obvious that the utilizable surface water volume hadnt satisfied the need of surface water diversion of realistic diversion-water irrigation area.Therefore,it is fairly severe situation of water resources utilization in Xinjiang.And so,agricultural water-saving is alternative to this problem.Taking a comprehensive view of development of agricultural irrigation in Xinjiang in last 50 years,there have surface irrigation technology and new-high water-saving technology.Through there are two kinds of irrigation technologies above-mentioned,it is difficult to realize the effect of water-saving and increasing production using the former which is engineering water-saving mode using canal anti-seepage technique.In some degree,it deprives ecological water use.The latter which is agronomic water-saving mode laying emphasis on crop growth mechanism can realize the effect of water-saving and increasing production.But,on the other hand,it is unable to improve the soil characteristics.On the contrary,it even possible aggravates soil salinization.Therefore,both engineering water-saving and agronomic water-saving must reconsider sustainability of watersaving.Can it realize reasonable water resources allocation of the whole watershed? Can it realize sustainable utilization of water resources in the whole watershed? This paper advances a new concept of modern agricultural water-saving-sustainable water-saving,which is different from real water-saving.
sustainable water-saving modern agriculture water-saving irrigation water and land exploitation Xinjiang
Zhong Ruisen Ma Yingjie Dong Xinguang He Ying
School of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi,8,30052,China
国际会议
南京
英文
174-182
2006-08-16（万方平台首次上网日期，不代表论文的发表时间）