000			03089nab|a22003977a|4500
001			64627
003			MX-TxCIM
005			20211203225702.0
008			202102s2020||||xxk|||p|op||||00||0|eng|d
022			_a2045-2322 (Online)
024	8		_ahttps://doi.org/10.1038/s41598-020-64857-w
040			_aMX-TxCIM
041			_aeng
100	0		_aNaling Bai _925485
245	1	0	_aLong-term effects of straw return and straw-derived biochar amendment on bacterial communities in soil aggregates
260			_aLondon (United Kingdom) : _bNature Publishing Group, _c2020.
500			_aPeer review
500			_aOpen Access
520			_aImproving soil structure, fertility, and production is of major concern for establishing sustainable agroecosystems. Further research is needed to evaluate whether different methods of straw returning determine the variations of soil aggregation and the microbial community in aggregates in the long term. In this study, we comparatively investigated the effects of long-term fertilization regimes performed over six years, namely, non-fertilization (CK), chemical fertilization (CF), continuous straw return (CS), and continuous straw-derived biochar amendment (CB), on soil aggregation and bacterial communities in rice-wheat rotation systems. The results showed that straw/biochar application increased soil nutrient content and soil aggregate size distribution and stability at both 0–20 cm and 20–40 cm soil depths, compared with those of CF and CK; CB performed better than CS. CB increased bacterial community diversity and richness in 0–20 cm soil, and evenness in 0–40 cm soil (p < 0.05); CS had no significant effect on these aspects. Variations in the relative abundance of Actinobacteria, Chloroflexi, Bacteroidetes, Nitrospirae, Gemmatimonadetes, and Latescibacteria in specific aggregates confirmed the different effects of straw/biochar on bacterial community structure. The partial least squares discrimination analysis and permutation multivariate analysis of variance revealed that fertilization, aggregate size fractions, and soil depth affected the bacterial community, although their effects differed. This study suggests that CB may reduce chemical fertilizer usage and improve the sustainability of rice-wheat cropping systems over the long term, with a better overall outcome than CS.
546			_aText in English
650		7	_aStraw _2AGROVOC _98207
650		7	_aSoil structural units _2AGROVOC _99249
650		7	_aBacteria _2AGROVOC _91017
650		7	_aSoil micro-organisms _2AGROVOC _925480
700	0		_aHanlin Zhang _925486
700	0		_aSheng Zhou _925487
700	0		_aHuifeng Sun _925488
700	0		_aYuhua Zhao _925489
700	0		_aXianqing Zheng _925490
700	0		_aShuangxi Li _925491
700	0		_aJuanqin Zhang _925492
700	0		_aWeiguang Lv _918391
773	0		_gv. 10, art. 7891 _dLondon : Nature Publishing Group, 2020. _x2045-2322 _tNature Scientific Reports _wa58025
856	4		_yClick here to access online _uhttps://doi.org/10.1038/s41598-020-64857-w
942			_cJA _n0 _2ddc
999			_c64627 _d64619