利用自然界中的有益微生物应用于农业生产 ,是减少化肥投入 ,减轻土壤板结 ,提高作物产量和经济效益的一条有效途径。“九五”期间黑龙江省农垦科学院作物所研究了玉米联合固氮工程菌 Enterbactergergoviae E7的田间接种效应 ,试验结果表明 ,E7具有增产节肥作用。但由于液体生 The use of beneficial microorganisms in nature for agricultural production is an effective way to reduce input of chemical fertilizers, reduce soil compaction, increase crop yields and economic benefits. During the “Ninth Five-Year” period, the Crop Research Institute of Heilongjiang Academy of Land Reclamation Sciences studied the field inoculation effect of Enterbacter gergoviae E7 combined with nitrogen-fixing engineering bacteria. The results showed that E7 had the effect of increasing yield and saving fertilizer. However, due to liquid students