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在黑龙江省以及吉林省适宜的农田管理条件下 ,连续 3年田间小区接种试验证明 ,接种联合固氮工程菌 E7( Entrobacter gergoviae E7)对玉米的增产、节肥效应都优于接种野生型菌 ,但增产幅度随土质不同有很大差异。在贫瘠的白浆土、砂壤土中 ,在相同施肥水平下 ,接种工程菌 E7比无菌载体平均增产 1 2 .3%,比接种野生型菌平均增产 8.8%;在相同产量水平下 ,接种工程菌比无菌对照节省氮肥 1 5%～ 2 0 %,比接种野生型菌节省氮肥 1 5%。而在草甸黑土中接种效应不明显。
In Heilongjiang Province and Jilin Province suitable farmland management conditions, three consecutive years of inoculation experiments in field plots showed that inoculation of Enzobacter gergoviae E7 was superior to inoculation of wild-type bacteria on corn yield and fertilizer efficiency Yield increase with different soil have very different. In barren white soil and sandy loam soil, under the same fertilization level, the inoculation engineered bacteria E7 increased by an average of 12.3% compared with the sterile carrier and an average increase of 8.8% compared with the inoculated wild type bacteria. At the same yield level, Compared with the sterile control, the engineered bacteria saved 15% ~ 20% nitrogen, which saved 15% nitrogen fertilizer more than the wild-type bacteria inoculated. In the meadow black soil inoculation effect is not obvious.