[Characters of infiltration and preferential flow of black soil in Northeast China under different tillage patterns].
By using dye tracer and double-ring infiltrometer techniques, the characters of infiltration and preferential flow of black soil under no-tillage (NT) and fall moldboard plow (MP) were compared after six years continuous management. The results showed that the infiltration rate was higher under NT than under MP. When the infiltration reached steady, the infiltration rate and accumulative infiltration capacity under NT were 1.35 and 1.44 times as high as those under MP, respectively. The penetration depth of methylene blue reached a depth of 43 cm in NT soil, being 16 cm deeper than that in MP soil. Comparing with MP soil, NT soil had better development of pore structure and more biological pores, and presented better preferential flow character, which were of importance for water infiltration and soil and water conservation.
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China. liwenfeng815@163.com
Wen-Feng
WF
Li
Xiao-Ping
XP
Zhang
Ai-Zhen
AZ
Liang
Yan
Y
Shen
Xiu-Huan
XH
Shi
Jin-Ming
JM
Luo
Xue-Ming
XM
Yang
D000383:Agriculture / Q000379:methods*; D008751:Methylene Blue / Q000032:analysis; D012987:Soil / Q000032:analysis*; D013025:Glycine max / Q000254:growth & development*; D014867:Water / Q000032:analysis; D014872:Water Movements; D003313:Zea mays / Q000254:growth & development*
D012987:Soil; D014867:Water; D008751:Methylene Blue