一、棉花N化肥全部基施的生理依据试验设3个处理:(1)全基施,每公顷施210公斤N和150公斤P_2O_5;(2)分次追肥,每公顷施210公斤N,67%用作基肥,33%作追肥(追肥中现蕾期追施33%,开花期追施 First, the cotton N fertilizer based on the physiological basis of all three facilities set up three treatments: (1) the whole base facilities, applying 210 kg N and 150 kg P_2O_5 per hectare; (2) sub-top dressing, applying 210 kg N hectare 67 % As a base fertilizer, 33% for top-dressing (top dressing bud stage 33% top-dressing, flowering topdressing