湖北农业科学 ›› 2018, Vol. 57 ›› Issue (14): 27-31.doi: 10.14088/j.cnki.issn0439-8114.2018.14.006

• 资源·环境 • 上一篇    下一篇

盐渍化弃耕地不同恢复年限对土壤团聚体含量及稳定性的影响

桑文, 王卫超, 杨磊, 张凤华   

  1. 石河子大学农学院/新疆兵团绿洲生态农业重点实验室, 新疆 石河子 832003
  • 收稿日期:2018-02-22 出版日期:2018-07-25 发布日期:2019-12-19
  • 通讯作者: 张凤华, (电子信箱)zfh2000@126.com。
  • 作者简介:桑 文(1996-), 女, 安徽太和人, 在读硕士研究生, 研究方向为农业生态环境, (电话)13029613081(电子信箱)1162243176@qq.com;
  • 基金资助:
    国家自然科学基金项目(31360320); 公益性行业科研专项(201503120); 兵团科技攻关与成果转化项目(2016AD022)

The Content of Soil Aggregates in Different Restoration Years of Salted Abandoned Land and the Impact of Stability

SANG Wen, WANG Wei-chao, YANG Lei, ZHANG Feng-hua   

  1. College of Agriculture, Shihezi University/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Corps, Shihezi 832003, Xinjiang, China
  • Received:2018-02-22 Online:2018-07-25 Published:2019-12-19

摘要: 通过新疆玛纳斯河流域盐渍化弃耕地田间试验, 研究了弃耕地不同恢复年限对土壤团聚体组成分布及稳定性的影响, 从而对弃耕地不同恢复年限处理土壤团聚体特性的变化做出评价。结果表明, 盐渍化弃耕地开垦后增加了大团聚体数量(特别是>5 mm和5~2 mm粒径团聚体), 且随着恢复年限的增加, 整体上大团聚体(直径>0.25 mm)比例均呈先下降(恢复1年)后增加的趋势, 微团聚体(<0.25 mm)比例呈先增加(恢复1年)后下降的趋势。团聚体R0.25MWDGMD恢复1年较弃耕地有所降低, 恢复5年、恢复10年和恢复15年均高于弃耕地, 且随着恢复年限的增加呈增加的趋势;土壤团聚体D随着恢复年限的增加呈现出相反的趋势。盐渍化弃耕地在恢复5年的土壤中团聚体结构性和稳定性显著高于弃耕地, 随着恢复年限的增加表现出增加的趋势。

关键词: 弃耕地, 团聚体, 稳定性, 干旱区

Abstract: Through the field trials of salinized abandoned farmland in the Manas River basin in Xinjiang, the effects of different restoration years of abandoned farmland on the composition and stability of soil aggregate were studied, and the changes of soil aggregate properties under different restoration years of abandoned farmland were evaluated. The results showed that the number of large aggregates(especially>5 mm and 5~2 mm agglomerates) was increased after reclamation of salted abandoned land, and with the increase of planting period after reclamation, the proportion of large aggregates(diameter>0.25 mm) showed decreased first(after 1 year) and then increased trend, and the proportion of micro-aggregates (<0.25 mm) increased first(after 1 year) and then decreased. The agglomerates R0.25, MWD and GMD decreased in the first year of restoration, and recovered for 5 years, recovered for 10 years and recovered 15 years higher than abandoned farmland, and showed an increased trend with the increase of recovery period. The fractal dimension of soil aggregates showed the opposite trend with the increase of recovery period. The structure and stability of aggregates in salted soils were significantly higher than those in abandoned soils after 5 years of restoration, and showed an increased trend with the increase of recovery period.

Key words: abandoned farmland, aggregates, stability, arid area

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