YAN Qiuyan, DONG Fei, JIA Yaqin, et al. Effects of Tillage Patterns on Soil Water Storage and Wheat Yield in Dryland Wheat Field[J]. 2021, 35(1): 222-228.
DOI:
YAN Qiuyan, DONG Fei, JIA Yaqin, et al. Effects of Tillage Patterns on Soil Water Storage and Wheat Yield in Dryland Wheat Field[J]. 2021, 35(1): 222-228. DOI: 10.13870/j.cnki.stbcxb.2021.01.032.
Effects of Tillage Patterns on Soil Water Storage and Wheat Yield in Dryland Wheat Field
In order to explore the variation characteristics of soil water storage and the potential yield improvement of dryland wheat by different tillage practices in south area of Shanxi Province. Field experiments were conducted to investigate the effect of two consecutive years tillage models (no tillage + drilling sowing
no tillage + furrow sowing
subsoiling + drilling sowing
and deep tillage + drilling sowing) on soil water storage
yield and water use efficiency of dryland wheat with Jinmai 92 as experimental material. The results showed that under no-tillage condition
furrow sowing performs more soil water storage in 100-200 cm depths compared with drilling sowing. The increasing effect of furrow sowing on wheat yield showed weak and even slightly decreased in drought years of 2018-2019. Furthermore
furrow sowing decreased water use efficiency by 3.6% and 9.3% during the two years
respectively. Subsoiling and deep tillage in fallow period increased soil water storage of 0-200 cm before sowing and regreen stage
of which deep tillage performed excellent in water contention. Besides
the increasing effect was mainly concentrated in 0-100 cm depth. During the two experimental years
deep tillage increased yield greatly by 44.6% and 147.2%. There was significant positive correlations between yield and aboveground biomass and grain numbers per spike. Subsoiling and deep tillage increased water use efficiency by 12.7%
46.74% and 53.70%
94.91% during the two years
respectively
and the more obvious effect was obtained in the drier year of 2018-2019. Therefore
deep tillage and subsoiling for two consecutive years in fallow period can improve the water storage capacity and the yield
water use efficiency of dryland wheat. The effect of furrow sowing on wheat yield under no tillage condition varies with different years
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