摘要
采用田间和小面积模拟降水试验的方法,对小麦机械收获后残茬覆盖与不覆盖两种条件下免耕、翻耕和间隔深松3种土壤耕作方式夏玉米田的土壤物理性状和水分利用效率进行了研究。结果表明,残茬覆盖与深松相结合,可平衡和改善耕层土壤温度状况,在土壤温度较低时具有保温作用,在土壤温度较高时具有降温作用;可以增加土壤的蓄水和保水能力,模拟降水后24h测定1m土层含水量比免耕不盖多26.1mm,全生育期平均耕层土壤含水量比免耕不覆盖高9.37%;土壤通透性也得到改善;最终水分利用效率比免耕不盖提高25.26%。
Field experiment on soil physical properties and water use efficiency of summer maize in three kinds tillage management of no tillage, moldboard plowing and subsoiling under two conditions of stubble mulch and no mulch with field and simulated rain fall methods have been conducted. Stubble mulch combined with subsoiling could balance and improve the status of soil temperature through the function of heat preservation on lower soil temperature condition and decrease the temperature at higher soil temperature. It could also increase the ability of water storing and preserving. After 24 hours of simulated rain fall, one meter deep soil water content was 26.1 mm more than that of the treatment of no mulch combined with no tillage, and plowing layer soil moisture was 9.73% higher than that of the treatment of no mulch combined with no tillage in whole growth duration. The soil density properties could be improved, and the whole water use efficiency was increased by 25.26% finally.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第1期52-56,共5页
Transactions of the Chinese Society of Agricultural Engineering
关键词
残茬覆盖
耕作方式
土壤物理性状
夏玉米
水分利用效率
stubble mulch
tillage management
soil physical properties
summer maize
water use efficiency
