Effect of Salinity on the Transformation of Wheat Straw and Microbial Communities in a Saline Soil. Issue 12 (4th July 2017)

• Record Type: Journal Article
• Authors: Xie, Wenjun; Wu, Lanfang; Wang, Jishi; Zhang, Yanpeng; Ouyang, Zhu
• Is Part Of: Communications in soil science and plant analysis. Volume 48:Issue 12(2017)
• Page Start: 1455
• Page End: 1461
• Publication Date: 2017-07-04
• Subjects: Microbial community -- nitrogen -- soil organic carbon -- soil salinity -- wheat straw; Soil science -- Periodicals; Plants -- Chemical analysis -- Periodicals; Agricultural chemistry -- Periodicals; 631.405
• DOI: 10.1080/00103624.2017.1373787
• Languages: English
• ISSNs: 0010-3624

Abstract

ABSTRACT: Currently, straw transformation in saline soil is largely unknown. The effect of soil salinity on wheat straw transformation and the roles of nitrogen (N) and phosphorus (P) were evaluated in a greenhouse experiment. By sodium chloride (NaCl) addition, straw was applied at the rate of 30 g kg −1 in various saline soils (2.0–4.0 g kg −1 ). N or combined N and P added in straw amended saline soil (3.0 g kg −1 ). Three replications of each treatment were sampled to determine straw residues at 30, 60, and 90 d. Results showed straw application significantly increased microbial biomass, especially fungal biomass. Soil salinity increased by 1.0 g kg −1, which decreased straw decomposed rate by 6.3 ~ 11.1%. N application significantly increased straw decomposed rate (p < 0.05), and high salinity obviously inhibited the humidification process of straw. We suggested that straw carbon transformation regulation and little straw residue accumulation in saline soil should arouse more attentions in future studies.