不同轮耕模式对旱地土壤结构及入渗蓄水特性的影响

为了探索免耕与深松隔年轮耕对土壤结构及入渗蓄水性能的影响,2007-2010年在宁南旱区采用免耕/深松/免耕、深松/免耕/深松与连年翻耕3种耕作模式,对土壤体积质量、团聚体、入渗率及水分利用效率等方面的影响进行了研究。结果表明:与连年翻耕相比,免耕/深松/免耕、深松/免耕/深松处理使0~60cm各土层土壤体积质量平均降低3.5%、6.2%(P〈0.05);使0~20cm土层〉0.25mm机械稳定性团聚体数量平均分别增加10.3%(P〈0.05)和20.3%(P〈0.01),〉20~40cm土层分别平均增加17.2%(P〈0.05)和23.6%(P〈0.01)。免耕/深松/免耕处理0~10cm和...

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Published in农业工程学报 Vol. 28; no. 5; pp. 85 - 94
Main Author 侯贤清 贾志宽 韩清芳 孙红霞 王维 聂俊峰 杨宝平
Format Journal Article
LanguageChinese
Published 农业部旱地作物生产与生态重点开放实验室,杨凌712100 2012
西北农林科技大学中国旱区节水农业研究院,杨凌712100
西北农林科技大学农学院,杨凌712100%西北农林科技大学中国旱区节水农业研究院,杨凌712100
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Summary:为了探索免耕与深松隔年轮耕对土壤结构及入渗蓄水性能的影响,2007-2010年在宁南旱区采用免耕/深松/免耕、深松/免耕/深松与连年翻耕3种耕作模式,对土壤体积质量、团聚体、入渗率及水分利用效率等方面的影响进行了研究。结果表明:与连年翻耕相比,免耕/深松/免耕、深松/免耕/深松处理使0~60cm各土层土壤体积质量平均降低3.5%、6.2%(P〈0.05);使0~20cm土层〉0.25mm机械稳定性团聚体数量平均分别增加10.3%(P〈0.05)和20.3%(P〈0.01),〉20~40cm土层分别平均增加17.2%(P〈0.05)和23.6%(P〈0.01)。免耕/深松/免耕处理0~10cm和〉30~40cm土层的水稳性团聚体稳定率分别比连年翻耕提高35.1%和45.8%(P〈0.05),深松/免耕/深松处理〉10~20cm和〉20~30cm土层水稳性团聚体稳定率分别提高101.7%和61.7%(P〈0.01)。不同轮耕模式显著增强了土壤的入渗性能,提高对土壤水分的有效利用及降水利用率,免耕/深松/免耕、深松/免耕/深松处理降雨入渗率较连年翻耕分别提高35.2%和15.3%(P〈0.05),水分利用效率平均提高7.2%和7.7%(P〈0.05),降水生产效率平均提高9.6%和10.7%(P〈0.05)。
Bibliography:Hou Xianqing,Jia Zhikuan,Han Qingfang,Sun Hongxia,Wang Wei,Nie Junfeng,Yang Baoping,(1.The Chinese Institute of Water-saving Agriculture,Northwest Agriculture and Forestry University,Yangling 712100,China;2.Key Laboratory of Crop Production and Ecology,Minister of Agriculture,Northwest Agriculture and Forestry University,Yangling 712100,China;3.College of Agronomy,Northwest Agriculture and Forestry University,Yangling 712100,China)
11-2047/S
soils; water; infiltration; rotational tillage pattern; water use efficiency; arid areas of southern Ningxia
In order to determine the effects of no-tillage(NT),subsoiling(ST) rotational tillage patterns on soil structure,infiltration and water storage characteristics,the rotational tillage experiments were conducted to study on soil bulk density,aggregate,infiltration rate and water use efficiency in arid areas of southern Ningxia from 2007 to 2010.Tillage treatments comprised NT/ST/NT(no-tillage in first year,subsoiling in second year,again no-tillage in third year),ST/NT/
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2012.05.015