文献类型： 外文期刊

作者： Zhang, Shuai ¹ ; Chen, Shuo ¹ ; Jin, Jiawen ¹ ; Wu, Gang ² ; Bolan, Nanthi S. ³ ; White, John R. ⁴ ; Shaheen, Sabry M. ⁵ ; Rinklebe, Joerg ⁵ ; Chen, Qing ¹ ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent Cont, 2 Yuanmingyuan Xilu, Beijing 100193, Peoples R China

2.Anhui Acad Agr Sci, Soil & Fertilizer Res Inst, Hefei 230031, Peoples R China

3.Univ Western Australia, UWA Sch Agr & Environm, UWA Inst Agr, Perth, WA 6001, Australia

4.Louisiana State Univ, Coll Coast & Environm, Dept Oceanog & Coastal Sci, Wetland & Aquat Biogeochem Lab, 3239 Energy,Coast & Environm Bldg, Baton Rouge, LA 70803 USA

5.Univ Wuppertal, Inst Fdn Engn, Sch Architecture & Civil Engn, Lab Soil & Groundwater Management, Pauluskirchstr 7, D-42285 Wuppertal, Germany

6.King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Arid Land Agr, Jeddah 21589, Saudi Arabia

7.Univ Kafrelsheikh, Fac Agr, Dept Soil & Water Sci, Kafr Al Sheikh 33516, Egypt

8.Shoolini Univ, Int Res Ctr Nanotechnol Himalayan Sustainabil IRC, Solan 173212, Himachal Prades, India

关键词： Flooded soil; Phosphorus leaching; Straw incorporation; Fe reduction; Acidification effect

期刊名称：GEODERMA （ 影响因子：7.422； 五年影响因子：7.444 ）

ISSN： 0016-7061

年卷期： 2022 年 428 卷

页码：

收录情况： SCI

摘要： Calcium cyanamide and straw additions coupled with one-month of flooding conditions can effectively inhibit soil diseases by generating anaerobic conditions and hydrolysing cyanamide during the summer fallow period in agricultural settings. However, the response of soil phosphorus (P) forms and mobility to the calcium cyanamide and straw additions under flooding conditions remain unknown. This study employed column leaching devices to monitor the P fractions and related movement in a flooded soil with six treatments: control, 0.5 g kg(-1) calcium cyanamide (CC), 2 g kg(-1) straw (S2), 0.5 g kg(-1) calcium cyanamide coupled with 2 g kg(-1) straw (CS2), 10 g kg(-1) straw (S10) and 0.5 g kg(-1) calcium cyanamide coupled with 10 g kg(-1) straw (CS10). The results showed that the CC significantly reduced the cumulative P leaching by 26.3%, compared with the control, attributed to the fixation of dissolved P by calcium hydroxide hydrolyzed from calcium cyanamide. The S2, CS2, S10 and CS10 reduced the cumulative P leaching by 10.4%, 41.0%, 70.0% and 80.5%, and enhanced soil P adsorption maximum and the proportions of NaOH-P fraction, compared with the control, respectively. The reason for low P mobility in treatments with straw addition could be attributed to the strengthened association between dissolved P and poorly crystalline Al/Fe/Mn oxides in soils due to an acidification effect induced by decomposition of straw under flooded conditions. Such acidification further coupled with calcium hydroxide was responsible for the lowering of P mobility in CS2 and CS10 treatments. Redundancy analysis indicated that topsoil organic carbon is the most important factor explaining 32.9% of the variations in soil P fractions and cumulative leached P across the treatments. This study highlights that calcium cyanamide in combination with straw additions suppressed soil P leaching under flooded conditions during the summer fallow period, which provided a net water quality benefit slowing release of P to the environment. Future studies should be carried out in agricultural regions with various soil mineral matrices.