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title: Short-term effects of tillage and residue on spring maize yield through regulating root-shoot ratio in Northeast China
author: You, Debao;  Tian, Ping;  Sui, Pengxiang;  Yang, Bin
Issued Date: 2017
Abstract: In recent years, yield instability of spring maize becomes increasingly pronounced under the traditional cropping system. In 2014 and 2015, short-term effects of tillage (plow-till, rotary-till and no-till) and residue (removal and incorporation) on soil properties, maize growth and yield were investigated in a brown soil region. Our results indicated that short-term reduced tillage (rotary-till and no-till) and residue incorporation promoted soil properties and maize growth. Compared with plow-till, rotary-till and no-till decreased soil bulk density and compaction below the plough layer (similar to 30 cm). The soil organic carbon (SOC), total nitrogen and C:N of surface soil layers increased under the rotary-till (0-20 cm) and no-till (0-10 cm), which were higher in 0-30 cm soil layers for residue incorporation. For both years, root characteristics of root diameter (RAD) and root surface area density (RSD), biomass indexes of root biomass (RB), shoot biomass (SB) and root-shoot ratio (R:S) were increased under these short-term treatments. Although there were positive relationships between soil water content (SWC), C:N, RAD, RSD, RB, SB, R: S and yield, structural equation modeling showed maize yield was directly controlled by R: S. These findings will have important implications for improving the current cropping system (i.e., plow-till with residue removed) in this area.
Content Type: 期刊论文
Appears in Collections:其他_期刊论文

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Recommended Citation:
You, Debao,Tian, Ping,Sui, Pengxiang,et al. Short-term Effects Of Tillage And Residue On Spring Maize Yield Through Regulating Root-shoot Ratio In Northeast China[J]. Scientific Reports,2017,7(X).

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