Stand establishment, root development and yield of winter wheat as affected by tillage and straw mulch in the water deficit hilly region of southwestern China
| Autor: | Hui Zeng, Jin-gang Li, Gang Huang, Chao-su Li, Chun Wu, Xiao-li Wu, Yong-lu Tang |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Crop residue Agriculture (General) Triticum aestivum Plant Science Root system 01 natural sciences Biochemistry S1-972 Crop Food Animals wheat Tiller stand establishment Mathematics Ecology mulch 04 agricultural and veterinary sciences Straw yield Tillage Agronomy Soil water tillage 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Animal Science and Zoology Agronomy and Crop Science Mulch 010606 plant biology & botany Food Science |
| Zdroj: | Journal of Integrative Agriculture, Vol 15, Iss 7, Pp 1480-1489 (2016) |
| ISSN: | 2095-3119 |
| Popis: | Good crop stand establishment and root system development are essential for optimum grain yield of dryland wheat (Triticum aestivum L.). At present, little is known about the effect of tillage and straw mulch on the root system of wheat under dryland areas in southwestern China. The aim of this study was to evaluate the effect of three tillage treatments (no-till, NT; rotary till, RT; conventional till, CT) and two crop residue management practices (straw mulch, ML; non-straw mulch, NML) on stand establishment, root growth and grain yield of wheat. NT resulted in lower soil cover thickness for the wheat seed, higher number of uncovered seeds, lower percentage of seedling-less ridges and lower tiller density compared to RT and CT; ML resulted in higher tiller density compared to NML. Straw mulching resulted in more soil water content and root length density (RLD) at most of the growth stages and soil depths. The maximum RLD, root surface area density and root dry matter density were obtained under NT. In the topmost 10 cm soil layer, higher RLD values were found under NT than those under RT and CT. There were no significant differences in the yield or yield components of wheat among the tillage treatments in 2011–2012, but NT resulted in a significant higher yield compared to RT and CT in 2012–2013. Grain yield was significantly higher in ML compared to in NML. A strong relationship was observed between the water-use efficiency and the grain yield. Both NT and ML proved beneficial for wheat in term of maintaining higher tiller density, better soil water status and root growth, leading to a higher grain yield and enhanced water-use efficiency, especially in a low rainfall year. |
| Databáze: | OpenAIRE |
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