Effect of long-term fertilisation on enzyme activities and microbial community composition in the rice rhizosphere. (31st December 2022)

• Record Type: Journal Article
• Authors: Li, Weitao; Kuzyakov, Yakov; Zheng, Yulong; Liu, Ming; Wu, Meng; Dong, Yuanhua; Li, Zhongpei
• Is Part Of: Acta agriculturæ Scandinavica. Volume 72:Number 1(2022)
• Page Start: 454
• Page End: 462
• Publication Date: 2022-12-31
• Subjects: Long-term fertilisation experiment -- rhizosphere properties -- enzyme activities -- phospholipid fatty acids; Horticulture -- Periodicals; Soil science -- Periodicals; Crops and soils -- Periodicals; Plant-soil relationships -- Periodicals; 630
• DOI: 10.1080/09064710.2021.2011394
• Languages: English
• ISSNs: 0906-4710

Abstract

ABSTRACT: Mineral fertilisers differ in changing soil properties, and revealing how the rhizosphere and non-rhizosphere respond could provide a robust assessment of fertiliser regimes. Rhizosphere and non-rhizosphere soils were sampled from five fertilisation treatments in a long-term (24 year) experiment. Enzyme activities and total phospholipid fatty acids (PLFA) content in the rhizosphere soil were 85.8% and 51.3% higher than in the non-rhizosphere soil, respectively. Fertilisation increased enzyme activities, especially the N-cycling enzyme β-1, 4-N-acetylglucosaminidase in NP fertilised soil (1.5 and 2.5 times for rhizosphere and non-rhizosphere soil, respectively). The PLFA composition indicated that fungi dominated in the rhizosphere fertilised with P, whereas bacteria were more common in the non-rhizosphere soil. The PLFA contents and enzyme activities in the rhizosphere of P-fertilised plants were lower than those in the non-rhizosphere soil because P availability was lower in the rhizosphere. The redundancy analysis showed that the microbial community in the rhizosphere soil was different from that of the non-rhizosphere soil, mainly because there were differences in the 15:1ω6c and 16:0. Long-term (24 year) fertilisation strongly increased nutrient contents, and microbial biomass and activity in paddy soil. It is advisable to apply P fertiliser in the root zone to increase fertiliser use efficiency.