甘薯源库关系建立、发展和平衡对氮肥用量的响应

宁运旺, 马洪波, 张辉, 汪吉东, 许仙菊, 张永春^*

Response of Sweetpotato in Source-Sink Relationship Establishment, Expanding, and Balance to Nitrogen Application Rates

NING Yun-Wang, MA Hong-Bo, ZHANG Hui, WANG Ji-Dong, XU Xian-Ju, ZHANG Yong-Chun^*

图4 甘薯生长中期不同施氮量处理的生物量增加 N30、N31和N32表示田间裂区试验中3个不同用量氮肥处理, 分别为0、120和240 kg N hm -2 。相同品种和植株部位标以不同字母的值在 P =0.05水平上差异显著。
Fig. 4 Increments of sweetpotato biomass at middle growth stage under different nitrogen rates N30, N31, and N32 were the three treatments with different nitrogen rates in field split-plot experiment, which were 0, 120, and 240 kg N hm -2 respectively. Values followed by different letters in the same cultivar and plant part are significantly different at P =0.05