Effect of vine cutting on biomass production and nutrient contents of sweetpotato
In order to study the effect of vine cutting on biological yield of sweet potato (SP) ,four SP varieties were selected and planted into 4 blocks of land of 30 m~2 each, randomly designed in quadruplicate. Every block of land was evenly divided into 2 plots. Vines in one of the plot were cut on 94 days in the middle growth phase after transplanting (treatment group) ,and those of another plot were cut at the end of the experiment (control group). The weight and nutritional indicators of both groups were measured. The vines and tubers were harvested on the 154th day,and the weight as well as general nutritional indices and amino acid composition were recorded. The results showed that: 1) The vine production of the treatment group increased by 21.95％,while the tuber yields decreased by 8.06％,as compared to the control group. 2) The total yields of tuber and vine of treatment group increased by 2.53％. 3) The ether extract content of vine in middle growth phase was significantly higher than in the harvest time (p <0.05),while the calcium content of vine in the middle growth phase was significantly lower than in the harvest time(p<0.05). 4) Among the 4 varieties of SP,the tuber of Xushu-18 had the highest production and starch content,and the tuber of Chuan-164 had the better nutrients composition.
sweetpotato cut frequency tuber and vine production
LIU Jin-yuan Carios U ZOU Cheng-yi LI Bin QU Dong YU Dan WANG Lin-shu YANG Jia-bao JING Xu-kai LEON VELARDE
Feed Research Institute of Sichuan Animal Science Academy,Chengdu,610066 International Potato Center,Peru
国际会议
徐州
英文
433-439
2010-11-27（万方平台首次上网日期，不代表论文的发表时间）