Author:
Liu Zhe,Cao Shiliu,Sun Zenghui,Wang Huanyuan,Qu Shaodong,Lei Na,He Jing,Dong Qiguang
Abstract
AbstractTillage treatments have an important effect on soil microstructure characteristics, water thermal properties and nutrients, but little is known in the newly reclaimed cultivated land. For the reason, a long-term field study was to evaluate the tillage effects on soil physicochemical properties and crop yield in newly reclaimed cultivated land via the macroscopic and microscopic analysis. Three tillage treatments were tested: continuous conventional moldboard plow tillage (CT), sub-soiling/moldboard-tillage/sub-soiling tillage (ST) and no-tillage/sub-soiling/no-tillage (NT). Under CT, the microstructure was dominated by weakly separated plates structure and showed highest bulk density (BD) (1.49 g cm−3) and lowest soil organic matter (SOM) (3.68 g kg−1). In addition, CT reduced the capacity of soil moisture retention and temperature maintenance, resulting in aggregate structure deterioration and fragility. Unlike CT, the soil was characterized by moderately separated granular structure and highly separated aggregate structure under conservation tillage practice of ST and NT. NT was associated with the highest soil moisture content (20.42%), highest quantity of macroaggregates (> 0.25 mm) by wet-sieving (34.07%), and highest SOM (6.48 g kg−1) in the surface layer. Besides, NT was better able to regulate soil temperature and improved the values of geometric mean diameter. Under NT and ST, a stable soil structure with compound aggregates and pores was formed, and the maize yield was increased by 12.9% and 14.9% compared with CT, up to 8512.6 kg ha−1 and 8740.9 kg ha−1, respectively. These results demonstrated the positive effects of NT and ST on soil quality and crop yield in newly reclaimed cultivated land.
Funder
the 2018 Open Fund for Shaanxi Key Laboratory of Land Remediation
the Scientific Research Item of Shaanxi Provincial Land Engineering Construction Group
Publisher
Springer Science and Business Media LLC
Reference67 articles.
1. Han, J. & Zhang, Y. Land policy and land engineering. Land Use Policy 40, 64–68 (2014).
2. Liu, Y. S. Introduction to land use and rural sustainability in China. Land Use Policy. 74, 1–4 (2018).
3. Liu, Y. S., Li, J. T. & Yang, Y. Y. Strategic adjustment of land use policy under the economic transformation. Land Use Policy 74, 5–14 (2018).
4. Yi, L. et al. Spatial-temporal change of major reserve resources of cultivated land in China in recent 30 years. Trans. CSAE (in Chinese) 29, 1–12 (2013).
5. Zhang, Y., Li, Z. B. & Dong, Q. G. Analysis of water and nutrients leakage on barren gravel land with different structure of topsoil. J. Soil Water Conserv. 32, 162–166 (2018).
Cited by
43 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献