通过对甘薯茎叶不同刈割率与间隔时间组合的比较试验 ,明确了在一定生长期内多次刈割能显著提高甘薯茎叶产量、地上地下部生物总产量和蛋白质产量。隔周刈割2 / 4的处理获得最高生物产量和粗蛋白质产量 ,分别比对照增加 1 3.3%和 2 1 .7% ,其次为隔 3周刈割 3/ 4处理 Through the comparative experiment of different mowing rate and interval time of sweet potato stem and leaf, it was clear that multiple mowing in certain growth period could significantly increase the yield of stem and leaf of sweet potato, the total biomass and the protein yield of above and below ground. The highest biologic yield and crude protein yield were obtained by 2/4 mulching for the next week, which increased by 3.3% and 21.7% respectively compared with the control, followed by 3/4 mulching at the third week