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农学学报

农学学报 ›› 2023, Vol. 13 ›› Issue (7): 63-69.doi: 10.11923/j.issn.2095-4050.cjas2022-0096

• 林学 园艺 园林 食用菌 • 上一篇    下一篇

秸秆还田方式对低丘橘园土壤碳库与蓄水能力的影响

黄越1(), 商小兰1, 徐星2, 郭水荣1(), 章明奎3   

  1. 1 杭州市农业技术推广中心，杭州 310020
    2 桐庐丰阳家庭农场，浙江桐庐 311500
    3 浙江大学环境与资源学院，杭州 310058
  • 收稿日期:2022-07-25 修回日期:2023-09-29 出版日期:2023-07-20 发布日期:2023-07-18
  • 通讯作者: 郭水荣，男，1966年出生，浙江兰溪人，正高级工程师，本科，主要从事农业生态环境监测。通信地址：310020 浙江杭州上城区杭海路768 号 杭州农业大楼，E-mail：xsgsr@163.com。
  • 作者简介:

    黄越，女，1988年出生，浙江杭州人，农艺师，本科，主要从事农业废弃物资源化利用。通信地址：310020 浙江杭州上城区杭海路768号 杭州农业大楼，E-mail：。

  • 基金资助:
    杭州市财政专项项目“餐厨废弃物原料土壤调理剂的应用试验示范”(2020-2022)

Effects of Different Straw Returning Patterns on Soil Carbon Pool and Water Storage Capacity in Low Hill Citrus Orchards

HUANG Yue1(), SHANG Xiaolan1, XU Xing2, GUO Shuirong1(), ZHANG Mingkui3   

  1. 1 Hangzhou Agricultural Technology Extension Center, Hangzhou 310020, Zhejiang, China
    2 Tonglu Fengyang Family Farm, Tonglu 311500, Zhejiang, China
    3 College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China
  • Received:2022-07-25 Revised:2023-09-29 Online:2023-07-20 Published:2023-07-18

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摘要：

为了深入理解秸秆还田对低丘柑橘园土壤的改良效果，采用田间微区方式开展2年试验，设对照（不施用秸秆）、覆盖还田、浅层还田、深层还田和全层还田等5个处理，比较研究了不同方式秸秆还田对土壤碳库及水分变化的影响。结果表明：各类秸秆还田方式均不同程度改善了土壤物理性状、有机碳含量、肥力指标和酶活性，但它们对不同深度土层的影响有所差异。秸秆覆盖还田只能改善表土最上部分土壤的理化性状，且对表层水分条件的改善优于其他还田方式；但其对深层土壤的影响不明显。秸秆翻耕还田兼具翻耕本身的松土作用和增加有机质输入，同时改善不同深度土层的物理性状与有机质和养分的积累，其对土壤性状的改良作用强度大于秸秆覆盖。总体上秸秆深层还田和全层还田对土壤改良作用的影响范围大于秸秆浅层还田，特别在增加深层土壤有机碳和水分的贮存方面秸秆深层还田效果尤为显著。研究认为，秸秆深层还田与地表覆盖相结合可全方位改善柑橘园土壤性状，新建果园前期可考虑以深层还田为主，后期逐渐转变为浅层还田或覆盖还田。

关键词: 秸秆还田方式, 地表覆盖, 深耕还田, 有机碳组分, 蓄水量

Abstract:

To deeply understand the effect of straw returning on soil improvement of low hill citrus orchards, a two-year micro-area field experiment was carried out. Five treatments were set up, including control (no straw), mulch returning, shallow returning, deep plough returning and full layer returning. The effects of different ways of straw returning on soil carbon pool and water content were studied. The results showed that all the straw returning patterns improved soil physical properties, organic carbon content, fertility index and enzyme activity in varying degrees, but their effects on different soil layers were different. Straw mulch returning could only improve the physical and chemical properties of the uppermost part of topsoil, and its improvement on surface moisture condition was better than that of other patterns of returning, but its effect on deep soil was not obvious. Straw deep plough returning could loosen the soil and increase the organic matter input. It could improve the physical properties of soil layers at different depths and the accumulation of organic matter and nutrients at the same time. The effects on soil were stronger than that of straw mulch returning. In general, the effects of straw deep plough returning and full layer returning on soil improvement were greater than that of straw shallow returning, and straw deep plough returning had especially significant effect on increasing the storage of organic carbon and water in deep soil layer. It is concluded that the combination of straw deep plough returning and surface mulch returning could improve the soil properties of citrus orchards in an all-round way. In the early stage of new orchards, straw deep plough returning should be considered, and in the later stage, the straw returning could be gradually changed to shallow returning or mulch returning.

Key words: straw returning pattern, surface coverage, deep plough returning, organic carbon component, water storage capacity