Application of Bio-organic Fertilizer Containing High-efficient Nitrogen-fixing Bacillus amyloliquefaciens on Strawberry

摘要

With strawberry as a test material,the effects of the bio-organic fertilizer containing high-efficiency nitrogen-fixing Bacillus amyloliquefaciens on nutrient contents in strawberry-planted soil,wilt occurrence and strawberry yield and quality were studied by a plot experiment,so as to provide reference for scientific use of the bio-organic fertilizer and green production of strawberry.The results showed that after hole-applying the bio-organic fertilizer at a rate of 22.5 t/hm 2,the contents of NH+4-N,available P,available K and organic matter did not change much with time;and when replacing 50%of chemical fertilizers with the bio-organic fertilizer at a rate of 11.25 t/hm 2(K 3),the contents of NH+4-N and available P in the soil did not change much with time,and the contents of available K and organic matter decreased slightly with time,but were both higher than the CK(the unfertilized treatment).Meanwhile,the disease index values of strawberry wilt disease in treatments K 2 and K 3 were significantly lower than those of the CK and the conventional fertilization treatment(K 1),and the vitamin C contents of strawberry fruit in the two treatments were significantly higher than that of the CK.The yield determination showed that the cumulative yields of treatments K 2 and K 3 increased by 9.8%and 3.3%,respectively,and the increase rates of the early yields(before the Spring Festival)were 30.6%and 21.9%,respectively.Therefore,the application of the bio-organic fertilizer can replace chemical fertilizers,and can achieve the effects of reducing the occurrence of wilt,improving the early yield of fruit commodity and improving fruit quality.