Effect of fertilization constitution on soil microorganism and soil respiration of tomato

In solar greenhouse,effect of CK(no fertilization),NP fertilizer,organic manure,biogas fertilizer on soil microorganism and respiration was studied.The results showed that,compared to CK,the number of bacteria of soil decreased by 0.6%～57.2%,fungi of soil increased first and then decreased,and actinomycete of soil increased by 7.4%～65.0% when using NP fertilizer.Application amount of NP fertilizer reduced a half,the number of fungi of soil increased,but actinomycete of soil decreased.By using organic manure,the number of bacteria,fungi and actinomycete of soil increased by 12.1%～160.8%,5.1%～142.3% and 46.2%～157.5%.When the application amount of organic manure reduced a half,the number of bacteria,fungi and actinomycete of soil decreased by 28.0%～87.8%,9.7%～40.3% and 21.8%～71.1%.By applying biogas fertilizer,the numbers of bacteria,fungi and actinomycete increased first and then reduced.Fertilization enhanced soil respiration,the extent of increasing under organic manure was the biggest,with 23.5%～118.6%,and that with biogas fertilizer was 20.8%～38.5%,while that with NP fertilizer was the smallest in all treatments.