Effects of Tillage Systems on Accumulation and Mineralization of Organic Carbon in Purple Paddy Soil

PENG Juan; FU Zhuo-wang; ZHU Jie; CI En; GAO Ming; XIE De-ti

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Effects of Tillage Systems on Accumulation and Mineralization of Organic Carbon in Purple Paddy Soil

更新时间：2024-11-07

- Effects of Tillage Systems on Accumulation and Mineralization of Organic Carbon in Purple Paddy Soil
- Vol. 25, Issue 4, (2011)
- 作者机构：
  
  西南大学三峡库区农业面源污染控制工程技术研究中心资源环境学院
- 作者简介：
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- Published：2011
- 稿件说明：
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PENG Juan, FU Zhuo-wang, ZHU Jie, et al. Effects of Tillage Systems on Accumulation and Mineralization of Organic Carbon in Purple Paddy Soil[J]. 2011, 25(4).
DOI：

PENG Juan, FU Zhuo-wang, ZHU Jie, et al. Effects of Tillage Systems on Accumulation and Mineralization of Organic Carbon in Purple Paddy Soil[J]. 2011, 25(4). DOI：

摘要

以稻田长期定位试验为平台

研究常规平作(中稻-冬水田)、垄作免耕(中稻-冬水田)、垄作免耕(中稻-油菜)和水旱轮作(中稻-油菜)4种耕作制度对紫色水稻土有机碳累积及矿化动态的影响。结果表明:实行不同耕作制度均能提高土壤有机碳密度

以垄作免耕(中稻-油菜)最佳。不同耕作制度实施20年后

农田0-10 cm表层土壤有机碳密度已趋于稳定

垄作免耕会提高10-20 cm和20-40 cm土层有机碳密度

而水旱轮作各土层有机碳密度均低于其他耕作处理。不同耕作制度下水稻土中易氧化有机碳数量和有机碳氧化稳定系数差异较大

其中

垄作免耕(中稻-油菜)下水稻土有机碳氧化稳定系数最大。各耕作处理中

土壤有机碳的最大矿化速率差异显著

有机碳矿化率和pH呈显著正相关;在培养期间

垄作免耕(中稻-油菜)的累积矿化量始终显著低于其他处理;常规平作(中稻-冬水田)的总矿化强度最大

垄作免耕(中稻-油菜)最小。

Abstract

A 20-year experiment was conducted to study the effects of different tillage systems on accumulation and mineralization of organic carbon in purple paddy soil.The experiment included four tillage treatments: Conventional tillage with rotation of rice and winter fallow system

no-tillage and ridge culture with rotation of rice and winter fallow system

no-tillage and ridge culture with rotation of rice and rape system

and conventional tillage with rotation of rice and rape system.The results showed that the or...

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