Coastal saline soil aggregate formation and salt distribution are affected by straw and nitrogen application: A 4-year field study
文献类型：期刊论文
| 作者 | Xie, Wenjun2; Chen, Qingfeng1; Wu, Lanfang3 ; Yang, Hongjun2; Xu, Jikun2; Zhang, Yanpeng2
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| 刊名 | SOIL & TILLAGE RESEARCH
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| 出版日期 | 2020-04-01 |
| 卷号 | 198页码:8 |
| 关键词 | Aggregate formation and stability Straw and N application Saline soil |
| ISSN号 | 0167-1987 |
| DOI | 10.1016/j.still.2019.104535 |
| 通讯作者 | Xie, Wenjun(xwjeric@163.com) |
| 英文摘要 | Little is known about the effects of straw incorporation on saline soil aggregate formation or salt distribution in coastal zones. In this study, a 4-year coastal wheat/maize rotation field experiment was employed. In each growing season, maize/wheat straw was applied at the rates of 5.0 x 10(3) kg ha(-1) (S) and 1.0 x 10(4) kg ha(-1) (2S), and inorganic N was applied at the rates of 75 kg ha(-1) (N1/2), 150 kg ha(-1) (N), and 300 kg ha(-1) (N2). Treatment without straw addition and applied with 150 kg ha(-1) inorganic N was used as the control (CK). Dry-and wet-sieving techniques were used to fractionate the soils into large macroaggregates ( > 2 mm, LM), small macroaggregates (0.25-2.0 mm, SM), microaggregates (0.053-0.25 mm, MI), and silt-plus-clay particles (< 0.053 mm, CS). Results revealed that the proportion of dry and water-stable macroaggregate fractions (> 0.25 mm, LA + SA) ranged from 74.2 %-88.3 % and 28.4 %-37.6 % in straw applied treatments, which significantly increased by 14.7 %-19.0 % and 21.1 %-32.4 % compared to CK, respectively (p < 0.05). The mean weight diameter (MWD) and aggregate stability rate (AR) enhanced as straw and N application rate increased. After straw application, soil organic carbon (SOC) preferentially accumulated in MI fractions, which was significantly higher than other aggregate fractions, except SN1/2 and CK (p < 0.05). MWD and AR were significantly negatively correlated with soil salinity (p < 0.05), and soil salinity decreased by 20.5 %-26.9 % in straw treatments compared to the initial soil salinity. In the CK and SN1/2 treatments, soil salinity of LA + SA fractions was significantly higher than < 0.25 nun fractions (MI + CS) (p < 0.05). The same difference in soluble Ca2+ was also observed in CK, SN1/2, or SN. In conclusion, saline soil aggregate formation and stability improved after straw and N application, which caused the salinity to decrease and affected salt distribution in aggregates. The findings of this study suggest that adequate N should be applied in order to maximize saline soil reclamation efficiency with straw. |
| WOS关键词 | ORGANIC-MATTER ; CARBON SEQUESTRATION ; WATER INPUTS ; DYNAMICS ; QUALITY ; STABILITY ; IMPACTS ; FRACTION ; YIELD |
| 资助项目 | National Natural Science Foundation of China[41877101] ; National Natural Science Foundation of China[31901456] ; Key Research and Development Program of Shandong Province[2019GNC106003] ; Taishan Scholars Program of Shandong, China[tsqn201812086] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000515443600003 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Key Research and Development Program of Shandong Province ; Taishan Scholars Program of Shandong, China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/132539]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xie, Wenjun |
| 作者单位 | 1.Shandong Normal Univ, Coll Geog & Environm, Jinan 250358, Shandong, Peoples R China 2.Binzhou Univ, Sch Biol & Environm Engn, Key Lab Instrumental Anal Binzhou City, Binzhou 256603, Shandong, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Wenjun,Chen, Qingfeng,Wu, Lanfang,et al. Coastal saline soil aggregate formation and salt distribution are affected by straw and nitrogen application: A 4-year field study[J]. SOIL & TILLAGE RESEARCH,2020,198:8. |
| APA | Xie, Wenjun,Chen, Qingfeng,Wu, Lanfang,Yang, Hongjun,Xu, Jikun,&Zhang, Yanpeng.(2020).Coastal saline soil aggregate formation and salt distribution are affected by straw and nitrogen application: A 4-year field study.SOIL & TILLAGE RESEARCH,198,8. |
| MLA | Xie, Wenjun,et al."Coastal saline soil aggregate formation and salt distribution are affected by straw and nitrogen application: A 4-year field study".SOIL & TILLAGE RESEARCH 198(2020):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
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