[Effects of tillage in fallow period on soil water and nitrogen absorption and translocation by wheat plant].
Field test was carried out to study the effect of tillage in fallow period on soil water before sowing and growth stages, and nitrogen (N) absorption, translocation by wheat plant. The current data showed that tillage in fallow period improved the soil water at the depth of 0-300 cm before sowing and growth stages, especially in dry years. Such tillage significantly improved N accumulation in leaf, stem and sheath (SS) at anthesis, grain N accumulation at maturity, N mobilization in SS and the contribution of mobilized N to grain N, amount of mobilized N in leaf, level of N accumulation before anthesis, N transportation from vegetative organs to grains after anthesis, and nitrogen accumulation after anthesis, which in turn enhanced the efficiency of N uptake. Deep tillage at 45 days after harvest had the best effect. Significant correlations were detected between soil water and N accumulation before anthesis as well as N translation from vegetative organs grains after anthesis, particularly in dry years, while the correlation between soil water from sowing to an thesis and nitrogen accumulation amount after anthesis was significant in wet years, but not in dry years. Tillage in fallow period especially deep tillage after raining could benefit soil water preservation, as well as N absorption and translocation by plant.
Ai-Xia
AX
Ren
Min
M
Sun
Wei-Feng
WF
Zhao
Lian-Feng
LF
Deng
Yan
Y
Deng
Zhi-Qiang
ZQ
Gao
D000383:Agriculture; D009584:Nitrogen / Q000378:metabolism*; D018515:Plant Leaves; D018547:Plant Stems; D012987:Soil / Q000737:chemistry*; D014908:Triticum / Q000502:physiology*; D014867:Water
D012987:Soil; D014867:Water; D009584:Nitrogen