Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (20): 124-131.doi: 10.11924/j.issn.1000-6850.casb2021-0332

Special Issue: 生物技术 畜牧兽医 水稻

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Effects of Application Amount of Biogas Slurry from Pig Manure on Agronomic Traits and Silage Quality of Rice

HOU Fuyin(), YANG Zhiqing(), JIN Chongfu, SHI Kai, AN Chen, CHEN Changkuan   

  1. Jiangsu Coastal Area Institute of Agricultural Sciences, Yancheng Engineering and Technology Research Center of Animal Husbandry Equipment, Yancheng, Jiangsu 224002
  • Received:2021-03-30 Revised:2021-07-27 Online:2022-07-15 Published:2022-08-23
  • Contact: YANG Zhiqing E-mail:houfuyin2008@126.com;yangzhiq88@126.com

Abstract:

In order to consume the biogas slurry of stock raising waste on site, reduce environmental pollution, the effect of biogas slurry application amount on rice agronomic traits and silage quality were studied. 17 biogas slurry fertilization levels of N2-N48, as well as conventional fertilizer (CF) application and blank control (CK) were designed. With the increase of biogas slurry application amount, the tillering number of rice increased significantly, and the biomass of rice increased first and then decreased, and the biomass of N8 fertilization group was the highest. The overall score of texture, color and smell of silage rice first increased and then decreased with the increase of biogas slurry application amount. When biogas slurry application amount exceeded N240% replacing nitrogen fertilizer, the pH of silage rice significantly increased (P<0.05). Compared with that of CF and CK, neutral detergent fiber in biogas slurry N2-N8 fertilization groups slightly decreased (P>0.05), but NDF in biogas slurry N14, N16, N20, N28, N32, N36, N40 and N48 groups significantly increased (P<0.05). There was no significant change in soluble sugar, acid detergent fiber, crude protein and crude fiber in different biogas slurry application groups compared with those of CF. Compared with that of CF, the crude ash content of silage rice in biogas slurry N2-N24 (except N14) groups had no significant difference (P>0.05), but when excessive biogas slurry (N280%-N480% replacing nitrogen fertilizer) were applied, the crude ash content significantly decreased (P<0.05). Replacing chemical fertilizer with biogas slurry is helpful to increase the biomass of rice and improve the quality of silage, but it should not be applied in excess.

Key words: biogas slurry from pig manure, rice, agronomic trait, silage quality

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