不同耕作方式土壤水分动态变化
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S344

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国家科技支撑计划项目(2011BAD16B10;2012BAD04B02)


Dynamic Changes of Soil Water Content under Different Tillage Methods
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    摘要:

    本研究在长期定位试验(1983年开始)条件下,研究了宽窄行、免耕、翻耕和常规耕作4种耕作方式土壤水分时空变化规律。结果表明:不同年份0~60 cm土壤含水率季节性变化趋势不规律。从平均土壤含水率来看,宽窄行(苗带)>宽窄行(茬带)>免耕>翻耕>常规耕作,2010~2012年宽窄行(苗带)较常规耕作高1.3个百分点。宽窄行(苗带)或(茬带)播种前0~20 cm土壤含水率明显高于其他处理,其次为免耕,土壤含水率最低为翻耕,差异达到显著(p<0.05)或者极显著(p<0.01)水平。从播种前至成熟期,不同耕作方式0~60 cm土壤含水率基本呈上升趋势,30~50 cm土壤含水率较高,宽窄行(苗带)50~60 cm土壤含水率深松后最高,深松后不仅有利于接纳雨水,而且土壤水分有由茬带向苗带侧下方运移的趋势。

    Abstract:

    In this study,dynamic changes of soil water content was studied with wide/narrow row alternation planting,no-tillage,plow tillage and conventional tillage under long-term experiment begun in 1983.The results showed that seasonal change of 0~60 cm soil water content with was irregular in different years.From a viewpoint of average soil water content,W/NRAP(seeding band)>W/NRAP(stubble band)>NT>PT>CT,which was 1.3 percentage higher in W/NRAP(seeding band) than CT from 2010 to 2012 years.Soil water content in 0~20 cm of W/NRAP(seeding band) or W/NRAP(stubble band) was significantly higher than other treatments,followed by the NT,PT was minimum,and the difference was significantly(p<0.05) or highly significant(p<0.01) levels before sowing.From sowing to harvest,soil water content at 0~60 cm appeared rising trend.Soil water content at 30~50 cm was higher than other layer.It was the highest after deep looser for W/NRAP(seedling band) 50~60 cm,because of deep loosen not only stored rainfall,but also transported water from stubble band to the bottom of seeding band.

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刘武仁,郑金玉,罗洋,郑洪兵,李瑞平,李伟堂,徐建飞.不同耕作方式土壤水分动态变化[J].东北农业科学,2014,39(4):1-5,11.

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  • 收稿日期:2014-02-20
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  • 在线发布日期: 2024-12-06
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