Content area
Full Text
Abstract 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-organie fertilizer and green production of strawberry. The results showed that after hole-applying the bio-organie fertilizer at a rate of 22. 5 t/hm2, the contents of NH4 -N , available P, available K and organic matter did not change much with time; and when replacing 50% of chemical fertilizers with the bio-organie fertilizer at a rate of 11.25 t/hm2 ( K3) , the contents of NH4+ -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 K2 and K3 were significantly lower than those of the CK and the conventional fertilization treatment (k ) , 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 K2 and K3 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-organie fertilizer can replace chemical fertilizers, and can achieve the effects of reducing the oeeurrenee of wilt, improving the early yield of fruit commodity and improving fruit quality.
Key words Bacillus amyloliquefaciens; Bio-organie fertilizer; Strawberry; Fertilizer efficiency; Fruit quality
In modem agricultural production, the large investment in chemical fertilizers has positively promoted the growth of crop yields, but meanwhile, it also brings serious ecological problems1121. In facility cultivation, problems such as soil acidification and hardening, reduction of organic matter, secondary salinization and reduction of crop quality and resistance to stress caused by long-term excessive application of chemical fertilizers have attracted extensive attention131. In order to ensure the sustainable development of China's agriculture, the Ministry of Agriculture proposed the...