Study On Water Saving Potential Of Rice In Jianghuai Hilly Area

Anhui province is a major province of rice production.The Jianghuai Hilly Area is an important rice planting area in Anhui province.At present,the contradiction between water supply and demand has become an important limiting factor for grain production.In this context,how to make efficient use of limited water resources to produce more food,and to meet the needs of people is particularly important.To explore the rice under different irrigation water requirement and water requirement,from 2014 and 2015 in Anhui Province Water Conservancy Science Research Institute of Feidong comprehensive experimental station to carry out agricultural water rice shallow wet irrigation experiment,dry different irrigation irrigation mode and the whole process of shallow wet irrigation way is compared through the design process in different rice planting the growth period,with measured daily water consumption and yield data of rice in Jianghuai Hilly Area under different irrigation water consumption,yield and water use efficiency were analyzed,and draw the curve in different growth stages of dry days and yield rate.The results showed that rice in different stages,different dry days of irrigation,water consumption of rice than the whole shallow wet irrigation treatments do not fall dry water consumption is small,with the increase in the number of dry rice consumption has gradually decreased,by2014 rice shallow wet irrigation experiment data analysis can get four fertility of rice during the period of water-saving rate of the order :Heading and flowering stage >tillering stage > jointing booting stage > mature stage;2015: Heading and flowering stage > jointing booting stage > tillering stage > mature st;rice dry treatment after the water consumption of rice often rebound phenomenon,in a short time the end of drying after the treatment,the daily water consumption of rice than dry time;jointing booting and flowering period is the growth period of daily water consumption more,in the two stage dry treatment water the most obvious effect,water saving rate was14.5%~53.3%;with the fall dry days increased,rice yield increased gradually,but the fall dry days increased further but will make the production rate decrease,especially the mature stage may also lead to excessive water production,increased the yield by-18% ~34.9%;from the production point of view,shallow wet irrigation rice tillering stage,jointing booting stage and heading stage and mature stage suitable for dry days were 4~6d,3~4d,3~4d,3d.Combined with the existing conditions of production,farming,and meteorological conditions in different growth stages of appropriate dry days of shallow wet irrigation is easy to operate,more easily accepted by the user,iseasy to popularize.