Scientia Agricultura Sinica ›› 2018, Vol. 51 ›› Issue (15): 2860-2871.doi: 10.3864/j.issn.0578-1752.2018.15.003

• TILLAGE & CULTIVATION·PHYSIOLOGY & BIOCHEMISTRY·AGRICULTURE INFORMATION TECHNOLOGY • Previous Articles     Next Articles

Relationship Between Soil Water Variation, Wheat Yield and Grain Protein and Its Components Contents Under Sub-Soiling During the Fallow Period Plus Mulched-Sowing

ZHANG HuiYu, SUN Min, GAO ZhiQiang, LIANG YanFei, YANG QingShan, ZHANG Juan, LI NianNian   

  1. College of Agronomy, Shanxi Agricultural University, Taigu 030801, Shanxi
  • Received:2017-12-25 Online:2018-08-01 Published:2018-08-01

Abstract: 【Objective】The objective of this paper was to clarify the effects of sub-soiling in fallow period (SS) and mulched-sowing on soil water storage, so as to contribute to explore the best tillage and mulched-sowing technique of winter wheat, which could further improve wheat grain yield and quality coordinately. 【Method】Field experiment was carried out from 2012 to 2014 in Wenxi, Shanxi province. Taking with or without SS as the main plots and three sowing methods (film-mulched soil hole sowing, FSH; film-mulched sowing, FM; drill sowing, DS) as the subplots, the effects of sub-soiling and mulched-sowing on soil water storage in the depth of 3 m, grain yield, grain protein content and yield were assessed.【Result】Compared with NT, the soil water storage in 0-300 cm soil layer from sowing stage to anthesis was improved significantly under SS, the yield was increased by 12%-30%, and the grain glutenin content and grain protein yield were improved significantly. Compared with DS, the soil water storage from wintering stage to anthesis stage was improved significantly, the grain yield was increased by 6%-24%, the grain gliadin content, grain protein content and grain protein yield increased significantly, the grain albumin increased. Compared with FSH, the soil water storage at anthesis was decreased significantly under the condition of SS combined with FM, yet showed no significant difference at each stage under the condition of NT combined with FM. The grain yield under FM was superior to that under FSH, showing significant difference under SS in 2012-2013, NT in 2013-2014. Under the condition of SS, the grain protein components content, grain protein content and yield were improved significantly under FM, compared with FSH. In addition, the soil water storage in the soil layer of 0-100, 100-200, 200-300 cm at anthesis showed positive effect by interaction, the soil water storage in the 100-200 cm soil layer showed closely relationship with grain protein in 2012-2013, and the soil water storage in the 200-300 cm soil layer showed closely relationship with grain protein in 2013-2014. Focusing on the contribution to grain protein yield, SS influenced the grain protein yield by affecting the soil water storage at anthesis; Under the condition of SS, the mulched-sowing influenced the grain protein yield by affecting the soil water storage at booting stage, and the contribution under FM was higher than under FSH. 【Conclusion】SS was beneficial to accumulate the precipitation. Mulched-sowing was conductive to reserve the soil water, such effect could last to anthesis. The soil water during the medium-term of the whole life related closely to the grain protein accumulation. In conclusion, SS plus film-mulched sowing could ultimately achieve the coordinated improvement of yield and grain protein content.

Key words: dryland wheat, sub-soiling during the fallow period, mulched-sowing, soil water, grain protein content

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