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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (22): 34-39.doi: 10.11924/j.issn.1000-6850.casb2022-0583

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Influences of Biogas Slurry Instead of Chemical Fertilizer on Yield and Quality of Radish in Open Field and Soil Physicochemical Properties

HAN Xiaofei1,2(), LI Xiaoran1, WANG Junwei3()   

  1. 1 College of Tourism and Planning, Pingdingshan University, Pingdingshan, Henan 467000
    2 Key Laboratory for Value Realization of Ecological Products of Mountains-Rivers-Forests-Farmlands-Lakes-Grasslands in Pingdingshan City, Pingdingshan, Henan 467000
    3 Ruzhou Agricultural and Rural Bureau of Pingdingshan City, Pingdingshan, Henan 467500
  • Received:2022-07-12 Revised:2022-12-02 Online:2023-08-05 Published:2023-07-28

Abstract:

The paper aims to explore the optimal amount of alternative chemical fertilizer under the condition of radish biogas slurry returning to field in the hilly-brown soil area of western Henan, and provide scientific theoretical basis for the recycling of biogas slurry. Under field conditions, radish variety ‘Pingfeng 3’ was used as experimental material, and five treatments were set up, including low biogas slurry (22.5 t/hm2, T1), medium biogas slurry (45 t/hm2, T2), high biogas slurry (67.5 t/hm2, T3), conventional fertilization (600 kg/hm2, T4) and no fertilization (0, CK). The effects of biogas slurry replacing chemical fertilizer on the growth, yield and quality of open field radish and soil physicochemical properties were studied. The results showed that biogas slurry had no negative effect on the growth and development of radish, and ensured the yield of radish. The highest yield of T3 treatment was 10.2% higher than that of T4. The root weight, root transverse stem, root length and leaf length of radish were the best in T3 treatment. The soluble solid content, protein and vitamin C content of radish treated with T1, T2 and T3 were significantly higher than those of T4 and CK (P<0.05). After biogas slurry was returned to the field, the soil nutrient content changed compared with that before returning to the field. Compared with T4 treatment, the organic matter and alkali-hydrolyzable nitrogen content in the biogas slurry treatment group were significantly increased (P<0.05), and the highest (T3 treatment) increased by 7.2% and 8.6%, respectively. The available phosphorus decreased, and the pH and total nitrogen, total phosphorus and total potassium changed little. Under the experimental conditions, it is recommended to apply biogas slurry three times during the whole growth period of open field radish, and the total application amount is controlled at 70t/hm2. The application periods are as basal fertilizer (50%) at the early sowing stage, seedling stage (30%) and rosette stage (20%).

Key words: biogas slurry replacement, radish, yield, quality, soil nutrient