摘要
通过分析不同秸秆覆盖量以及耕作方式对0~20cm、20~40cm、40~60cm土层土壤孔隙度、土壤持水性、土壤供水能力以及土壤水分有效性的影响,揭示黑土区秸秆覆盖、耕作方式对土壤水分特性的影响机制。结果表明:土壤持水性、土壤供水能力及土壤水分有效性与土壤孔隙度密切相关。0~20cm、20~40cm、40~60cm土层的土壤总孔隙度、毛管孔隙度、相同土壤水吸力下土壤含水率、比水容量以及有效水含量,在传统耕作条件下,秸秆覆盖均高于无覆盖;在秸秆覆盖条件下,免耕均高于传统耕作。免耕秸秆覆盖处理影响土壤孔隙度、土壤持水性、土壤供水能力及土壤水分有效性,随秸秆覆盖量增加,土壤总孔隙度、毛管孔隙度、相同土壤水吸力下土壤含水率、比水容量以及有效水含量逐渐增大,随土层加深,各处理土壤孔隙度、土壤持水性及土壤供水能力逐渐减小。本研究区最适宜的秸秆覆盖与耕作方式为免耕150%秸秆覆盖处理。
By analyzing the effects of different straw mulching amounts and tillage methods on the soil porosity,soil water retention property,soil water supply capacity and soil water effectiveness in 0~20 cm,20~40 cm and 40~60 cm soil layers,the mechanism of straw mulching and tillage methods on soil water characteristics in black soil region was revealed.The result showed that soil water retention property,soil water supply capacity and soil water effectiveness were closely related to soil porosity.Under conventional tillage treatment,the soil total porosity,soil capillary porosity,soil water content under the same soil water suction,specific water capacity and available water content under straw mulching treatment were higher than those under bare soil in 0~20 cm,20~40 cm and 40~60 cm soil layers.Under straw mulching treatment,the soil total porosity,soil capillary porosity,soil water content under the same soil water suction,specific water capacity and available water content under no-tillage treatment were higher than those under conventional tillage treatment in 0~20 cm,20~40 cm and 40~60 cm soil layers.No-tillage with straw mulching treatment affected soil porosity,soil water retention property,soil water supply capacity and soil water effectiveness.Under no-tillage treatment,soil total porosity,soil capillary porosity,soil water content under the same soil water suction,specific water capacity and available water content were increased with the increase of straw mulching.Soil porosity,soil water retention property and soil water supply capacity were decreased gradually with soil depth.The most suitable straw mulching and tillage method in the study area was no-tillage with 150%straw mulching.
作者
刘继龙
李佳文
周延
付强
张玲玲
刘璐
LIU Jilong;LI Jiawen;ZHOU Yan;FU Qiang;ZHANG Lingling;LIU Lu(School of Water Conservancy and Civil Engineering,Northeast Agricultural University,Harbin 150030,China;School of Science,Northeast Agricultural University,Harbin 150030,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2019年第7期333-339,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金项目(51409046)
黑龙江省自然科学基金项目(E2018005、E2016005)
东北农业大学学术骨干项目(16XG12)
东北农业大学青年才俊项目(17QC25)
黑龙江省博士后科研启动金项目(LBH-Q16023)
黑龙江省博士后经费项目(LBH-Z17009)
关键词
秸秆覆盖
耕作方式
土壤孔隙度
土壤持水性
土壤供水能力
土壤水分有效性
straw mulching
tillage methods
soil porosity
soil water retention property
soil water supply capacity
soil water effectiveness
