Scientia Agricultura Sinica ›› 2012, Vol. 45 ›› Issue (22): 4574-4586.doi: 10.3864/j.issn.0578-1752.2012.22.004

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

Effect of Tillage in Fallow Period on Soil Water, Post-Anthesis Proline Accumulation and Grains Protein Accumulation in Dryland Wheat

 ZHAO  Hong-Mei, GAO  Zhi-Qiang, SUN   Min, ZHAO  Wei-Feng, LI   Qing, DENG   Yan, YANG  Zhen-Ping   

  1. College of Crop Science, Shanxi Agricultural University, Taigu 030801, Shanxi
  • Received:2012-06-26 Online:2012-11-15 Published:2012-09-10

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Abstract: 【Objective】 A field plot experiment was conducted to study the effect of tillage in fallow period at different times on soil water storage, post-anthesis proline accumulation in flag leaves and grains and grains protein accumulation in winter wheat. The study will supply a new way for soil moisture conservation of one time in fallow period and a theoretical basis for improving yield and quality of dryland wheat.【Method】The effects of two treatment stages including 15 days and 45 days after wheat harvest, two tillage methods including deep tillage and subsoiling (no tillage as control) on soil water storage, post-anthesis proline accumulation in flag leaves and grains, protein accumulation, the change of activity of glutamine synthetase (GS) and activity of glutamate dehydrogenase(GDH), grains protein and the relation between proline content and nitrogen metabolism enzyme were determined. 【Result】The results showed that soil water storage at the depth of 0-300 cm was improved by tillage in fallow period, especially in dry year and deep tillage in 45 days after wheat harvest had better soil moisture conservation effects. Proline content in flag leaves, proline content in grains of post-anthesis 5-15 d and activity of GDH in flag leaves and grains were reduced, however, GS in grains and protein yield in grains were enhanced by tillage in fallow period. Tillage stage had obvious difference in activity of GS and grain protein content in different rainfall years. Activity of GS in flag leaves and protein content in grains were reduced by tillage in dry year. In abundant water year the activity of GS in flag leaves and protein content in grains were reduced in 15 days after wheat harvest and enhanced in 45 days after wheat harvest by tillage. Under tillage in fallow period, the correlation between soil water storage before sowing and proline content in grains was higher than that of proline content in flag leaves by tillage in fallow period. The relation between proline content in flag leaves and the activity of GDH in flag leaves, proline content in grains and the activity of GS in flag leaves was closed in 15 days after wheat harvest by tillage. The relation between proline content in flag leaves and the activity of GDH in grains was closed in 45 days after wheat harvest by tillage. But there were no relation between proline in grains and two enzymes in 45 days after wheat harvest by tillage. 【Conclusion】The above results suggested that tillage in fallow period especially in dry year had better soil moisture conservation effects, benefit for decreasing the proline content in flag leaves and proline content in grains at early filling stage, relieving drought degree of wheat suffered. As proline content had a great relation with nitrogen metabolism enzyme, so grains protein accumulation was affected. Tillage stage had great regulation effects on soil water, post-anthesis proline accumulation and grains protein accumulation. Deep tillage after rainfall benefit for grains protein formation.

Key words: dryland wheat , fallow period , tillage , proline content , nitrogen metabolism , protein content

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