Studies on the feasibility of high-density breeding of black soldier fly larvae
To achieve faster conversion of food waste by black soldier fly through high insect densities,different feeding density conditions(60 000,120 000 and 200 000 larvae/m2)were evaluated using laboratory simulation experiments regarding the characteristics and production performance of black soldier fly culture,which could provide technical support for reducing the land area in large-scale aquaculture design and improving the input-output benefits for the project.Overall,the increase in insect density demonstrated the following effects:①Higher temperature was observed for the breeding material,and the organic matter,total nitrogen,total potassium and total nutrient contents of the residual materials gradually decreased after the transformation of black soldier flies,but the total phosphorus content increased to varying degrees.On the other hand,the average length and weight of black soldier fly larvae gradually decreased,along with less crude fat content in the worm.The total potassium in the worm increased to varying degrees,while the total nitrogen and total phosphorus in the worm remained little changed.② The survival rate and feeder ratio of black soldier fly larvae gradually decreased,but the collected insect amount and material reduction rate per unit area gradually increased,suggesting the treatment cycle of food waste could be shortened and the overall conversion efficiency could be improved.Under the best production conditions(with feeding density of 200 000 larvae/m2),the conversion time of food waste was 10 d,the insect collection per unit area was 15.75 kg/m2,the material reduction rate was81.72％,and the insect ratio was 3.22.Our research will provide the basis for the optimization of production technical parameters with regards to the transformation of food waste in black soldier fly.
万方数据
维普
