长期施用不同剂量氮肥对高粱产量、氮素利用特性和土壤硝态氮含量的影响
王媛1,2(), 王劲松1, 董二伟1, 武爱莲1, 焦晓燕1,*()
Effects of long-term nitrogen fertilization with different levels on sorghum grain yield, nitrogen use characteristics and soil nitrate distribution
WANG Yuan1,2(), WANG Jin-Song1, DONG Er-Wei1, WU Ai-Lian1, JIAO Xiao-Yan1,*()

图1. 不同施氮量下高梁淀粉含量和淀粉产量
不同字母表示同一年度不同处理间差异达0.05显著水平。处理同表3

Fig. 1. Content of total starch and starch yield at different nitrogen application rates (mean±SD)
Values followed by different letters mean significant differences among treatments in a year at the 0.05 probability level. Treatments are the same as those given in Table 3.