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（天丰牌）生物固氮肥系河北省北戴河固氮肥厂研制的无毒无害无污染菌肥,是利用固氮微生物将空气中的氮元素固定在土壤中,其代谢产物供作物生长所需。1997年,我们受温州飞龙绿色工程股份有限公司委托,在分葱上进行肥效试验,效果显著,现报告如下。 一、材料与方法 （一）供试肥料生物固氮肥（北戴河产）,尿素（乌克兰产）。 （二）试验方法1997年4月至6月在瓯海区天河镇郑岙村进行。试验地前作为水稻,质地为砂壤上,肥力中等。试验设4个处理:（A）固氮肥4kg/亩,（B）固氮肥 4kg/亩+尿素15kg/亩,（C）固氮肥4kg亩+尿素25kg/亩.（D）尿素25kg/亩（作对照）。每处理3次重复,随机区组排列,四周设保护行。每小区面积15m~2,行距20cm,株距11cm、于 4月4日定植,管理方法一致。全生育期浇施2次（5月9日和5月25日）,6月15日采收,分别测产,并进行统
(Tianfeng brand) biological nitrogenous fertilizer Hebei Beidaihe nitrogenous fertilizer plant developed non-toxic pollution-free bacterial fertilizer is the use of nitrogen fixation microorganisms in the air of nitrogen in the soil, its metabolites for crop growth. In 1997, we were entrusted by Wenzhou Feilong Green Engineering Co., Ltd. to carry out fertilizer efficiency test on shallots and the effect was remarkable. The report is as follows. I. Materials and Methods (a) Test Fertilizer Biological nitrogen fixation (Beidaihe production), urea (Ukraine). (B) Test Method April 1997 to June in Chenghai Village, Tianhe Town, Ouhai District. Before the experiment as a rice, sandy soil texture, medium fertility. The experiment includes 4 treatments: (A) nitrogenous fertilizer 4kg / mu, (B) nitrogen fixing fertilizer 4kg / mu + urea 15kg / mu, (C) nitrogen fixing fertilizer 4kg mu + urea 25kg / For comparison). Each treatment 3 times repeated random block arrangement, surrounded by protection line. Each plot area of 15m ~ 2, spacing 20cm, plant spacing 11cm, April 4 colonization, the same management approach. The whole growth period of irrigation facilities 2 (May 9 and May 25), June 15 harvest, were measured, and the system