棉花秸秆还田对土壤团聚体有机碳及氮磷钾含量的影响

doi:10.13287/j.1001-9332.201612.015

应用生态学报 ›› 2016, Vol. 27 ›› Issue (12): 3944-3952.doi: 10.13287/j.1001-9332.201612.015

棉花秸秆还田对土壤团聚体有机碳及氮磷钾含量的影响

王双磊^1,2, 刘艳慧¹, 宋宪亮¹, 魏少滨³, 李金埔^1,4, 聂军军¹, 秦都林¹, 孙学振^1*

¹作物生物学国家重点实验室/山东农业大学农学院, 山东泰安 271018;
²烟台市农业技术推广中心, 山东烟台 264001;
³山东省东营区史口镇农业综合服务中心, 山东东营 257000;
⁴平顶山市种子管理站, 河南平顶山 467000

收稿日期:2016-04-14 出版日期:2016-12-18 发布日期:2016-12-18
通讯作者: * E-mail: sunxz@sdau.edu.cn
作者简介:王双磊,男,1989年生,助理农艺师. 主要从事农业技术推广工作. E-mail: wsl_050304@126.com
基金资助:
本文由国家科技支撑计划项目(2013BAD05B06)、山东省现代农业产业技术体系(棉花)建设专项(SDAIT-03)、山东省农业良种工程项目(2013LZ, 2014LZ)、山东省自然科学基金项目(ZR2013CM005)和山东农业大学盐碱地改良利用项目(2014)资助

Effects of cotton straw returning on soil organic carbon, nitrogen, phosphorus and potas-sium contents in soil aggregates

WANG Shuang-lei^1,2, LIU Yan-hui¹, SONG Xian-liang¹, WEI Shao-bin³, LI Jin-pu^1,4, NIE Jun-jun¹, QIN Du-lin¹, SUN Xue-zhen^1*

¹State Key Laboratory of Crop Biology / College of Agronomy, Shandong Agricultural University, Tai’an 271018, Shandong, China;
²Yantai Agricultural Technology Extension Center, Yantai 264001, Shandong, China;
³Comprehensive Agricultural Service Center of Shikou Town, Dongying 257000, Shandong, China;
⁴Seed Management Department of Pingdingshan, Pingdingshan 467000, Henan, China

Received:2016-04-14 Online:2016-12-18 Published:2016-12-18
Contact: * E-mail: sunxz@sdau.edu.cn
Supported by:
This paper was supported by the Key Projects in National Science & Technology Support Program (2013BAD05B06), Modern Agro-industry Technology Research System (SDAIT-03), Shandong Program for Improved Varieties of Agriculture (2013LZ, 2014LZ), Natural Science Fund of Shandong Province (ZR2013CM005) and Saline Alkali Land Improvement and Utilization Project of Shandong Agricultural University (2014).

摘要/Abstract

摘要： 试验设置棉花秸秆还田和不还田两个处理,还田年限为3年.于第3年11月采集0～5、5～10、10～20和20～30 cm的原状土,采用干筛法将土壤团粒结构分级,研究棉花秸秆还田对土壤团聚体组成和不同粒径土壤团聚体中有机碳和速效氮、磷、钾含量的影响.结果表明: 在0～5 cm土层,棉花秸秆还田显著提高了>5和5～2 mm团聚体含量,显著降低了<0.25 mm微团聚体含量;团聚体有机碳、碱解氮和速效钾含量显著提高,平均提高幅度分别为19.2%、14.2%和17.3%.在5～10 cm土层中,棉花秸秆还田显著提高了>5和5～2 mm团聚体含量,显著降低了<0.25 mm微团聚体含量;团聚体有机碳、碱解氮和速效钾显著提高,平均提高幅度分别为19.6%、12.6%和23.4%.在10～20 cm土层中,棉花秸秆还田显著降低了<0.25 mm微团聚体含量;团聚体有机碳、碱解氮和速效钾含量显著提高,平均提高幅度分别为8.4%、10.9%和11.5%.在20～30 cm土层中,棉花秸秆还田仅显著提高了团聚体速效钾含量,比对照提高了12.0%.棉花秸秆还田显著提高了0～5、5～10 cm土层>5和2～5 mm团聚体各养分贡献率及0.25～0.5 mm团聚体有机碳、碱解氮贡献率,显著降低了<0.25 mm微团聚体各养分贡献率.棉花秸秆还田能增加大团聚体百分含量,降低微团聚体百分含量;显著提高各粒径土壤团聚体中有机碳、碱解氮和速效钾的含量,对速效磷含量无显著影响;提高了大团聚体对土壤养分的贡献率,有利于土壤结构及其养分状况的改善和棉花籽棉、皮棉产量的提高.

Abstract: To clarify the effects of cotton straw returning on the composition and contents of nu-trients in different particle sizes of aggregates, two treatments with or without cotton straw returning were tested in continuous three years. After three years straw treatments, we collected undisturbed soil within 0-5, 5-10, 10-20 and 20-30 cm soil layers, and to measure the composition, soil organic carbon, nitrogen, phosphorus and potassium contents in different particle sizes of aggregates classified using dry sieving. Returning cotton straw into the field significantly increased particle contents of 2-5 mm and >5 mm aggregates in 0-5 cm soil layer, while the content of <0.25 mm micro-aggregates was decreased. Cotton straw returning significantly improved soil organic carbon, nitrogen, and potassium contents by 19.2%, 14.2% and 17.3%, respectively, compared to no returning control. In 5-10 cm soil layer, cotton straw returning increased the contents of 2-5 mm and >5 mm aggregates, reduced the content of <0.25 mm micro-aggregate, but significantly increased contents of soil organic carbon, available nitrogen and potassium by 19.6%, 12.6% and 23.4%, compared to no straw returning control. In 10-20 cm soil layer, cotton straw returning significantly reduced the content of <0.25 mm micro-aggregates, and significantly enhanced soil organic carbon, nitrogen, and potassium contents by 8.4%, 10.9% and 11.5%, compared to the control. However, in 20-30 cm soil layer, cotton straw returning only increased soil available potassium content by 12.0%, while there were no significant changes in particle size, organic carbon, nitrogen and phosphorus contents. We concluded that cotton straw returning could significantly improve the structure of surface soil by increasing the number of macro-aggregates, contents of organic carbon, available nitrogen and potassium in aggregates, while decreasing micro-aggregate content. The enhancement of the contribution of macro-aggregates to soil fertility by returning cotton straw could improve soil physical structure, fertility and then increase cotton yield.

王双磊, 刘艳慧, 宋宪亮, 魏少滨, 李金埔, 聂军军, 秦都林, 孙学振. 棉花秸秆还田对土壤团聚体有机碳及氮磷钾含量的影响[J]. 应用生态学报, 2016, 27(12): 3944-3952.

WANG Shuang-lei, LIU Yan-hui, SONG Xian-liang, WEI Shao-bin, LI Jin-pu, NIE Jun-jun, QIN Du-lin, SUN Xue-zhen. Effects of cotton straw returning on soil organic carbon, nitrogen, phosphorus and potas-sium contents in soil aggregates[J]. Chinese Journal of Applied Ecology, 2016, 27(12): 3944-3952.

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棉花秸秆还田对土壤团聚体有机碳及氮磷钾含量的影响

Effects of cotton straw returning on soil organic carbon, nitrogen, phosphorus and potas-sium contents in soil aggregates

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