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1973年我县有5万多亩甘薯施用菌肥,获得良好效果,对促进粮食增产起到了一定的作用。一、增产效果根我们44处试验情况来看,每亩用5斤磷细菌或8两“五四○六”孢子粉,掺40斤细土于栽薯时穴施或苗期追肥,不同土质、肥力的地块都有不同程度的增产。增产10-20％的,有6处施用磷细菌,3处施用“五四○六”;增产20-30％的,有18处施用磷细菌,27处施用“五四○六”;增产30％以上的,有20处施用磷细菌,14处施用“五四○六”。一般施用磷细菌的平均增产27.7％,施用“五四○六”的平均增产25.3％。另外,施用菌肥可以降低黑斑病薯块的发病率,一般施用“五四○六”降低3.2％,施用磷细菌降低1.5％。二、增产原因菌肥施入土壤后,经微生物
In 1973, there were more than 50,000 mu of sweet potato in our county, which achieved good effect and played a certain role in promoting grain yield. First, the effect of increasing the yield of 44 of our trial situation, per acre with 5 kg of phosphorus bacteria or 8 two “5460” spore powder, mixed with 40 pounds of fine soil in the potatoes when the hole Shi or seedling fertilizer, different soil Fertility plots have different levels of yield. The yield was increased by 10-20%. Phosphate bacteria were used in 6 places and “5460” in 3 places. Phosphate bacteria were used in 18 places and “5460” in 27 places with a yield increase of 20-30% Above 20%, 20 were used for phosphorus bacteria and 14 for “5460”. The average increase of phosphorus bacteria was 27.7%. The average yield of “May Fourth” was 25.3%. In addition, the application of bacteriostat can reduce the incidence of black spot potato tubers, the general application of “May Fourth” reduce 3.2%, the use of phosphorus bacteria decreased by 1.5%. Second, the reasons for increased production of fertilizer applied to the soil, the microorganisms