Organic amendment increases wheat yield by improving soil N transformations and reducing N loss in North China Plain. Issue 14 (6th December 2022)

• Record Type: Journal Article
• Authors: Liu, Lu; Zhang, Shirong; Chen, Mengmeng; Cui, Dejie; Ding, Xiaodong
• Is Part Of: Archives of agronomy and soil science. Volume 68:Issue 14(2022)
• Page Start: 1974
• Page End: 1987
• Publication Date: 2022-12-06
• Subjects: Organic amendment -- N transformation -- mineral N -- yield; Horticulture -- Periodicals; Soils -- Periodicals; 630.5
• DOI: 10.1080/03650340.2021.1946682
• Languages: English
• ISSNs: 0365-0340

Abstract

ABSTRACT: Organic amendments could improve soil nitrogen (N) availability and transformation characteristics, which decreases the N loss within soil profile induced by N excessive application. A field experiment was designed in Shiqiang village with different organic amendments in 2018: (i) control (CK); (ii) chemical fertilizer (NPK); (iii) 1200 kg C ha −1 plus NPK (NPKM) and (iv) 40 kg humic acid ha −1 plus NPK (NPKH). Compared with NPK treatment, in 0–30 cm soil, NH4 + -N content in NPKM and NPKH treatments was increased by 9.15% and 13.36% and NO3 – N content was increased by 11.44% and 12.85%, respectively, while in 30–60 cm soil, NO3 – N content in NPKM and NPKH treatments was decreased by 13.51% and 8.54%, because organic amendments inhibited N leaching to deeper soil. Soil urease and invertase activity in NPKH treatment was 9.52% and 8.31% higher than that in NPK treatment, which was decreased with the decreasing soil depth. The grain yield was increased by 14.17% and 23.87% in NPKM and NPKH treatments, respectively. Thus, humic acid fertilizer was better in increasing wheat yield by improving N transformation and enzyme activities, which could increase wheat N uptake and inhibit N loss in North China Plain.