干旱区生态环境知识资源中心(Arid): Effects of cropping system and fertilization regime on soil phosphorous are mediated by rhizosphere-microbial processes in a semi-arid agroecosystem

Arid

DOI	10.1016/j.jenvman.2020.111033
	Effects of cropping system and fertilization regime on soil phosphorous are mediated by rhizosphere-microbial processes in a semi-arid agroecosystem
	Roohi, Mahnaz; Arif, Muhammad Saleem; Yasmeen, Tahira; Riaz, Muhammad; Rizwan, Muhammad; Shahzad, Sher Muhammad; Ali, Shafaqat; Bragazza, Luca
通讯作者	Arif, MS
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2020
卷号	271
英文摘要	In semi-arid regions, soil phosphorus (P) dynamics in cereal-legume intercropping are not yet fully elucidated, particularly in relation to integrated application of fertilizers. To this aim, we investigate the effects of different fertilizers on various P fractions in relation to the rhizosphere-microbial processes in a cowpea/maize intercropping system. Field experiments were conducted during two consecutive years (2016-2017) in a split-plot design by establishing cowpea/maize alone or intercropped onto the main plot, while the sub-plot was treated with four types of fertilization, i.e. no fertilizer addition (control), organic amendment (compost), mineral fertilizers (NPK) and multi-nutrient enriched compost (NPKEC). Our results showed that NPKEC fertilizer increased NaHCO3-P-i by 69% in maize, 62% in cowpea and 93% in intercropped plots compared to control plots. Similarly, a significant increase in the NaHCO3-P-o fraction was also recorded with NPKEC treatment in all cropping systems. In case of moderately labile P, NPKEC fertilizer caused the highest increase of NaOH-P-o (12.87 +/- 0.50 mg P kg(-1) soil) and NaOH-P-i (22.29 +/- 0.83 mg P kg(-1) soil) fractions in intercropped plots. Except for intercropping, NPK application caused an increase in the non-available P fraction (HCl-P-i), while the use of NPKEC decreased the HCl-P-i concentration in all cropping systems, suggesting stronger merits both for intercropping and NPKEC. Surprisingly, maize exhibited substantially higher phosphatases activity compared to cowpea in monoculture amended with compost, implying distinct crop strategies for adaptation under low P conditions. Based on the multi-factor analysis, the close association of NaHCO3-P with P solubilizing bacteria, root carboxylates and pH indicated that rhizosphere processes are the strongest predictors of immediately available P. Since alkaline phosphatase (ALP) is a P-degrading enzyme of microbial origin, rhizosphere related ALP association may have originated from root-associated microflora promoting P mobilization. Furthermore, the strong association of microbial biomass P (MBP) and acid phosphates (ACP) with NaOH-P fraction indicated moderately available P cycle in soil was mainly driven by microbial-related processes. Factor analysis map and two-way ANOVA confirmed that fertilization regime had a stronger effect on all tested variables compared to cropping system. Altogether, our results suggest that a combination of microbial-rhizosphere processes controls the dynamics of P fertility in semi-arid soils. In the broader context of improving soil P fertility, it is highly recommended the use of environmentally sustainable sources of fertilizer, such as NPKEC, which can enhance the competitive performance of legume-cereal intercropping under semi-arid agroecosystems.
英文关键词	Organic amendment Root carboxylates Soil enzyme activity Cowpea-maize Sandy clay loam
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000558812000086
WOS关键词	ZEA-MAYS L. ; USE EFFICIENCY ; ORGANIC-MATTER ; COVER CROPS ; PHOSPHATE ; WHEAT ; AVAILABILITY ; MANAGEMENT ; COMPOST ; PRODUCTIVITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325579
作者单位	[Roohi, Mahnaz; Arif, Muhammad Saleem; Yasmeen, Tahira; Riaz, Muhammad; Rizwan, Muhammad; Ali, Shafaqat] Govt Coll Univ Faisalabad, Dept Environm Sci & Engn, Faisalabad 38000, Pakistan; [Shahzad, Sher Muhammad] Univ Sargodha, Univ Coll Agr, Dept Soil & Environm Sci, Sargodha, Pakistan; [Bragazza, Luca] Agroscope, Field Crop Syst & Plant Nutr, Res Div Plant Prod Syst, Route Duillier 50,POB 1012, CH-1260 Nyon, Switzerland
推荐引用方式 GB/T 7714	Roohi, Mahnaz,Arif, Muhammad Saleem,Yasmeen, Tahira,et al. Effects of cropping system and fertilization regime on soil phosphorous are mediated by rhizosphere-microbial processes in a semi-arid agroecosystem[J],2020,271.
APA	Roohi, Mahnaz.,Arif, Muhammad Saleem.,Yasmeen, Tahira.,Riaz, Muhammad.,Rizwan, Muhammad.,...&Bragazza, Luca.(2020).Effects of cropping system and fertilization regime on soil phosphorous are mediated by rhizosphere-microbial processes in a semi-arid agroecosystem.JOURNAL OF ENVIRONMENTAL MANAGEMENT,271.
MLA	Roohi, Mahnaz,et al."Effects of cropping system and fertilization regime on soil phosphorous are mediated by rhizosphere-microbial processes in a semi-arid agroecosystem".JOURNAL OF ENVIRONMENTAL MANAGEMENT 271(2020).