Abstract
The study on Growth and Yield of Japanese Sweet Potato Beni Haruka Variety by Using Different of Compose Fertilizer rates, The Objectives of this study was to study on Growth of Growth of Japanese Sweet Potato and Yield of Japanese Sweet Potato. The study was conducted in Department of Plant Science’s Farm Faculty of Agriculture National University of Laos by 5 Months, The Study started in 05 December 2018 to 16 May 2019. The result of this study shown that the growing in The number Peak of Sweet Potato when the age of 150 days was shown that the higher than other is T4 by using compose fertilizer rate is 6kg/m2 , The number of peak by average is 44.33, T2 the number of peak by average is 40.56, T3 the number of peak by average is 37.89 and The lower of the number of peak is T1 control the number of peak by average is 34.00 by sinificant in statistic (p<0.05). Growing in the number of Leaves that higher than other is T4 the number of leave by average is 183.33, T2 The number of leave by average is 182.78, T3 The number of leave by average is 173.78 and the lower of the number of leave is T1 control the number of leave by average is 104.33 by significant in statistic (p<0.05). Yield in the number of yield that higher than other is T4 28.59 kg/7.5 m2 , T3 the number of yield is 24.39 kg/m2 , T2 the number of yield 18.60 kg/m2 and the lower of the number of yield by average is T1 control the number of yield is 13.59 kg/m2 by significant in statistic (p<0.05).