Exploration On Cultivation Technique Of Ratoon Rice In South Area Of Henan

South Henan is the main rice growing area in Henan province,In order to make full use of local temperature and light resources,in recent years,the form of ratooning paddy growing began to appear.To realize the goal of high-yield and high-quality and explore the ratooning rice cultivation techniques in South Henan,with the support of Department of Agriculture of Henan Province and Henan Agricultural University’s project of on-duty practice for graduate,the ratooning rice cultivation experiment were carried out in Shangcheng county,Which is early in ratooning rice cultivation.The cultivar for test is Liangyou 6326,All experiments were conducted in the field,and the main results as follow:(1)Application of 195kg/hm2 fertilizer to promote bud fertilizer,application in two times,that is before harvest:after harvest.main-crop rice and the ratooning rice yield were the highest in the treatments of 4:6.The high yield of main-crop rice mainly depended on spike numbers,setting percentage and thousand seed weight.The high yield of ratooning rice mainly depended on spike numbers and number of grain per spike.The yield of ratooning rice determines the the yield of main rice.(2)Under the condition of different agrochemical bioregulators spraying and without of the the second bud fertilizer,urea increased the spike number of ratooning rice.Appearance quality and milled rice rate in GA treatment of ratooning rice rice were better than that in the treatments of indole acetic acid and urea foliar fertilizer.(3)The experiment of stubble height on ratooning rice with three treatments: high stubble(50cm),middle stubble(35cm)and low stubble(20cm)showed that the highest yield was the stubble height of 50 cm,which is 77.07% higher than low stubble,for ratooning rice.High stubble made for high yield of ratooning rice.