配施秸秆沼渣有机肥对菜心生长、产量、经济效益的影响OA

This study was to investigate the characteristics of organic fertilizers derived from straw-based biogas sludge and evaluate their effects on the growth,yield,and economic returns of Chinese flowering cabbage.The experiment was conducted under the condi-tion of uniform chemical fertilizer application.The experiment was conducted by utilizing a research method that combined both indoor and outdoor settings.Straw-based biogas sludge organic fertilizer and 70 round-leaf cauliflowers were selected as the materials for the test.After the bulk density,porosity,electrical conductivity(EC),pH,germination index,and nutrient content of the straw-based bio-gas sludge organic fertilizer had been analyzed,four treatments were then established:the conventional application rate of chemical fertilizers was used as the control(CK);15 tonnes per hectare of straw biogas sludge organic fertilizer combined with 300 kilograms per hectare of compound fertilizer constituted Treatment 1(T1);22.5 tonnes per hectare of straw biogas sludge organic fertilizer mixed with 300 kilograms per hectare of compound fertilizer formed Treatment 2(T2);30.0 tonnes per hectare of straw biogas sludge organic fertilizer together with 300 kilograms per hectare of compound fertilizer comprised Treatment 3(T3).The results showed that the straw biogas sludge organic fertilizer was distinguished by its loose and porous texture,exhibiting a yellowish-brown color and an inherent alkaline property.It boasted a bulk density of 0.29 g·cm-3,alongside a notable germination index of 82.78%.The measured total ni-trogen content stood at 20.29 g·kg-1,and the organic matter content was impressive at 61.82 g·kg-1,qualifying it as an excellent or-ganic fertilizer for nurturing Chinese flowering cabbage.Throughout the growth cycle of the Chinese flowering cabbage,it was observed that plants in the T2 treatment group attained significantly greater heights over those in the CK control group.The growth rates for plant height followed a descending order:T2>CK>T3>T1,and similarly for stem thickness:T2>T3>T1>CK.Yields from areas treated with the straw biogas sludge organic fertilizer surpassed those in the CK group for all treatments,with the T2 treatment outperforming the CK by an impressive 50.54%.After the costs for labor,land leveling,machinery,seeds,fertilizers,and pesticides had been de-ducted,it was determined that the economic benefits derived from the treatments using straw biogas sludge organic fertilizer were higher than those from the CK treatment.The T2 treatment had yielded an economic benefit of 79 600 yuan per hectare,which repre-sented an increase of 18 100 yuan per hectare compared to the CK treatment.In conclusion,the T2 treatment was shown to effectively enhance the growth of Chinese flowering cabbage,leading to a significant increase in yield and yielding higher economic returns.