摘要
研究了保护性耕作方式(耙地覆盖、深松覆盖、免耕覆盖)对寒地旱作区土壤温度的影响规律,以传统翻耕为对照组,建立了试验区。试验结果表明:保护性耕作对土壤温度有明显的调节作用。4月21日至5月20日前后,保护性耕作土壤日平均温度明显高于传统翻耕土壤日平均温度,其中耙地覆盖比对照组日均土壤温度高0.58℃,深松覆盖比对照组日均土壤温度高1.22℃,免耕覆盖比对照组日均土壤温度高1.67℃;5月底以后保护性耕作土壤日平均温度低于传统翻耕。研究还表明:保护性耕作与传统翻耕相比,5,10,15,20cm各层土壤平均分别增温0.7～2.6℃、0.5～1.4℃、0.3～1.1℃、0.1～1.0℃,随着土壤层深度的增加,保护性耕作对土壤温度的调节作用越来越小。
For researching the effect of different tillage managements on soil temperature in cold and dry farming areas,the test plot was established.Four treatments were mulch with harrow tillage,mulch with subsoiling and mulch with No-tillage,conventional tillage CK.The testing results indicated there was a visible regulating effect in soil temperature with conservation tillage.From April 21th to May 20th,the soil temperatures of conservation tillage was higher than conventional tillage evidently,the daily average soil temperatures of mulch with harrow tillage,mulch with subsoilingand mulch with No-tillage were higher 0.58℃,1.22℃ and 1.67℃ than conventional tillage respectively.After the end of May,the soil temperature of conservation tillage was lower than conventional tillage evidently.Compared with conventional tillage,the soil temperatures of each layer underground 5,10,15 and 20 cm were increased by 0.7～2.6℃,0.5～1.4℃,0.3～1.1℃ and 0.1～1.0℃ respectively.The regulating effects in soil temperature were reduced with the increase of the depth of soil layer.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2008年第1期44-47,共4页
Journal of Shenyang Agricultural University
基金
农业部“948”项目(2005-Z42)
关键词
耕作方式
寒地
土壤温度
tillage management
cold area
soil temperature
