EFFECT OF NO 3 N AND NH + 4 N ON SOYBEAN SEEDLING AND NITROGEN ACCUMULATION
Song Haixing Shen Sile Yian Shi Ma Shuying (University of Agriculture and Animal Science of PLA, Changchun 130062) Sun Jingxia (Changchun Agricuitural Technology Service Centre)
The results showed that soybean seedlings applied NO 3 N and NH + 4 N together is better than applying any one only. Effect of pH on the soybean seedling applied with NO 3 N or mixed N is not evident, but the seedlings under pH 7.5 are better than that of pH5.5 in using NH + 4 N. The results also indicated that total N content of stems and leaves under seven proportions of NO 3 N; NH + 4 N are as following; 3∶15∶11∶11∶31∶51∶00∶1,the same for plant height and fresh weight. As increasing of application of NO 3 N, the NO 3 N accumulation in stems and leaves is increased, and as increasing of application of NH + 4 N ammonium nitrogen is increased.